92-690: Magnolia champaca , known in English as champak ( / ˈ tʃ ʌ m p ə k / ), is a large evergreen tree in the family Magnoliaceae . It was previously classified as Michelia champaca . It is known for its fragrant flowers, and its timber used in woodworking. The species epithet, champaca , comes from the Sanskrit word चम्पक campaka ( pronounced [tɕɐmpɐkɐ] ). Other vernacular names in English include joy perfume tree, yellow jade orchid tree and fragrant Himalayan champaca. The tree
184-900: A flowering plant family, the magnolia family , in the order Magnoliales . It consists of two genera : Magnolia and Liriodendron (tulip trees). Unlike most angiosperms , whose flower parts are in whorls (rings), the Magnoliaceae have their stamens and pistils in spirals on a conical receptacle . This arrangement is found in some fossil plants and is believed to be a basal or early condition for angiosperms. The flowers also have parts not distinctly differentiated into sepals and petals , while angiosperms that evolved later tend to have distinctly differentiated sepals and petals. The poorly differentiated perianth parts that occupy both positions are known as tepals . The family has about 219 species and ranges across subtropical eastern North America , Mexico and Central America ,
276-494: A clear-felled boreal forest site in northeastern Ontario. Similar plants were potted and kept in a greenhouse. In outplanted trees, maximum stomatal conductances (g) were initially low (<0.01 cm/s), and initial base xylem pressure potentials (PSIb) were -2.0 MPa. During the growing season, g increased to about 0.20 cm/s and PSIb to -1.0 MPa. Minimum xylem pressure potential (PSIm) was initially -2.5 MPa, increasing to -2.0 MPa on day 40, and about -1.6 MPa by day 110. During
368-414: A dam, or changing a watercourse. or building manmade ponds. The water source and water pumps should to be close to fields In this situation, water will need testing for pH, and testing for chemicals in the water to ensure an acceptable water quality. Two common types of irrigation systems are drip irrigation , and overhead irrigation . Landscape Topography A good slope for a plant nursery
460-445: A desired size. Mostly the plants concerned are for gardening, forestry , or conservation biology , rather than agriculture . They include retail nurseries, which sell to the general public; wholesale nurseries, which sell only to businesses such as other nurseries and commercial gardeners ; and private nurseries, which supply the needs of institutions or private estates. Some will also work in plant breeding . A " nurseryman "
552-534: A freezer chest and cooled to some level for some specific duration; a few days after removal, seedlings were assessed for damage using various criteria, including odour, general visual appearance, and examination of cambial tissue (Ritchie 1982). Stock for fall planting must be properly hardened-off. Conifer seedlings are considered to be hardened off when the terminal buds have formed and the stem and root tissues have ceased growth. Other characteristics that in some species indicate dormancy are color and stiffness of
644-462: A greater early season resistance to water-flow through the soil–plant–atmosphere continuum (SPAC) than had containerized outplants. Resistance to water flow through the SPAC decreased in bareroot stock of both species as the season progressed, and was comparable to containerized seedlings 9 to 14 weeks after planting. Bareroot black spruce had greater new-root development than containerized stock throughout
736-695: A high-elevation planting study in southeastern British Columbia. In the larger gaps (≥1.0 ha), height increment by year 6 was ranging from 10 cm to 20 cm. Lajzerrowicz et al. Concluded that plantings of conifers in clearcuts at high elevations in the southern mountains of British Columbia are likely to be successful, even close to timberline; and group selection silvicultural systems based on gaps 0.1 ha or larger are also likely to succeed. Gaps smaller than 0.1 ha do not provide suitable conditions for obtaining adequate survival or for growth of outplanted conifers. Planting stock, "seedlings, transplants, cuttings, and occasionally wildings, for use in planting out,"
828-487: A major influence on field performance. The field performance among various stock types in Ontario plantations was examined by Paterson and Hutchison (1989): the white spruce stock types were 2+0, 1.5+0.5, 1.5+1.5, and 3+0. The nursery stock was grown at Midhurst Forest Tree Nursery, and carefully handled through lifting on 3 lift dates, packing, and hot-planting into cultivated weed-free loam. After 7 years, overall survival
920-509: A means of beauty ornament as well as a natural perfume. Flowers are floated in bowls of water to scent the room, as a fragrant and colourful decoration for bridal beds, and for garlands. The tree was traditionally used to make fragrant hair and massage oils. Jean Patou ’s famous perfume, ' Joy ', the second best selling perfume in the world after Chanel No. 5 , is derived in part from the essential oils of champaca flowers. The vernacular name "Joy perfume tree" comes from this. A scent similar to
1012-511: A minimized handling and lifting-planting cycle, a system based on specification for nursery stock and minimum morphological standards for acceptable seedlings works tolerably well. In certain circumstances, benefits often accrue from the use of large planting stock of highly ranked morphological grades. Length of leading shoot, diameter of stem, volume of root system, shoot:root ratios, and height:diameter ratios have been correlated with performance under specific site and planting conditions. However,
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#17327823956601104-418: A morning heat shock increased HSP 73 in the mitochondrial but decreased it in the microsomal fraction. Heat shock increased soluble HSP 72/73 levels in both the morning and afternoon. In all instances, shoot and root heat tolerances were significantly greater in the afternoon than in the morning. Planting stock continues to respire during storage even if frozen. Temperature is the major factor controlling
1196-459: A narrow umbelliform crown . It has strongly fragrant flowers in varying shades of cream to yellow-orange which bloom during June to September. The obovoid-ellipsoid carpels produce 2−4 seeds during September to October. Magnolia champaca varieties and hybrids include: In Thailand, there are other purported hybrids cultivated with other species, including with Magnolia liliifera and Magnolia coco . In Theravada Buddhism , champaca
1288-450: A percentage of TA was higher in field-planted white spruce than jack pine until the end of the season. The stomata of both white and black spruce were more sensitive to atmospheric evaporative demands and plant moisture stress during the first growing season after outplanting on 2 boreal sites in northern Ontario than were jack pine stomata, physiological differences that favoured growth and establishment being more in jack pine than in
1380-499: A phylogeny with fifteen major clades, two subfamilies, two genera, and fifteen sections, maintaining Magnolia' s classification as one monophyletic genus. Dong et al. also place Magnolia as the sole genus of the subfamily Magnolioideae made up of fifteen sections. However, Yang et al. and Zhao et al. work with phylogenies of the Magnoliaceae that recognize several genera in the Magnolioideae. Although phylogenetic trees of
1472-407: A root system to develop new roots or extend existing roots cannot be determined by eye, yet it is the factor that makes or breaks the outcome of an outplanting operation. The post-planting development of roots or root systems of coniferous planting stock is determined by many factors, some physiological, some environmental. Unsatisfactory rates of post-planting survival unrelated to the morphology of
1564-429: A salable size and either sold to other nurseries that may continue to grow the plants out in larger containers or field grow them to desired size. Propagation nurseries may also sell plant material large enough for retail sales and thus sale directly to retail nurseries or garden centers (which rarely propagated their own plants). Nurseries may produce plants for reforestation , zoos, parks, and cities. Tree nurseries in
1656-508: A short growing season, low air and soil temperatures, severe winters, and deep snow. The survival and growth of Engelmann spruce and subalpine fir outplanted in 3 silvicultural trials on such sites in gaps of various sizes were compared by Lajzerowicz et al. (2006). Survival after 5 or 6 years decreased with smaller gaps. Height and diameter also decreased with decreasing size of gap; mean heights were 50 cm to 78 cm after 6 years, in line with height expectations for Engelmann spruce in
1748-414: A specific number and size of plant, while others produce a wide range of plants that are offered for sale to other nurseries and landscapers and sold as first come first served. Retail nurseries sell plants ready to be placed in the landscape or used in homes and businesses. Propagation nurseries produce new plants from seeds, cuttings, tissue culture, grafting, or division. The plants are then grown out to
1840-417: A specific type of plant using a small area of land, or very larger operations covering many acres. They propagate plant material or buy plants from other nurseries which may include rooted or unrooted cuttings, or small rooted plants called plugs, or field ~grown bare root plants, which are planted and grown to a desired size. Some wholesale nurseries produce plants on contract for others which place an order for
1932-449: Is planted in the ground in tropical and in subtropical climate gardens, such as in coastal Southern and Central California. It is planted in containers in cooler temperate climates. It requires full sun and regular watering. The fragrant flowers attract butterflies and hummingbirds . Its aril -covered seeds are highly attractive to birds. Magnoliaceae The Magnoliaceae ( / m æ ɡ ˌ n oʊ l i ˈ eɪ s i i / ) are
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#17327823956602024-407: Is 1-2 degrees. Any more than 5 degrees will make the nursery susceptible to soil erosion. The nursery stock should be planted in rows running across the slopes. If the landscape of the nursery has sections of land where erosion could occur, the nursery needs to come up with a solution such as by using erosion prevention structures like rip rap. Topography impacts nursery design and layout and it
2116-411: Is 2-year-old seedling planting stock that has not been transplanted, and Candy's (1929) white spruce 2+2+3 stock had spent 2 years in the seedbed, 2 years in transplant lines, and another 3 years in transplant lines after a second transplanting. Variations have included such self-explanatory combinations, such as 1½+1½, etc. The class of planting stock to use on a particular site is generally selected on
2208-414: Is a factor in strategizing what direction to plant rows. It also impacts where windbreaks should be planted. If an area has a flat slope and is open, it will need a windbreak . Soil Conditions For a nursery to produce healthy crops, it will need to have healthy soil. The soil should have good drainage and nutrient holding capacity. Soil testing will help a nursery find out its pH levels, and also
2300-576: Is a person who owns or works in a nursery. Some nurseries specialize in certain areas, which may include: propagation and the selling of small or bare root plants to other nurseries; growing out plant materials to a saleable size, or retail sales. Nurseries may also specialize in one type of plant, e.g., groundcovers , shade plants, or rock garden plants. Some produce bulk stock, whether seedlings or grafted trees, of particular varieties for purposes such as fruit trees for orchards or timber trees for forestry. Some producers produce stock seasonally, ready in
2392-401: Is a solitary, showy flower with indistinguishable petals and sepals. Sepals range from six to many; stamens are numerous and feature short filaments which are poorly differentiated from the anthers . Carpels are usually numerous, distinct, and on an elongated receptacle or torus. The fruit is an etaerio of follicles which usually become closely appressed as they mature and open along
2484-515: Is always subject to a variety of conditions that are never optimal in toto . The effect of sub-optimal conditions is to induce stress in the plants. The nursery manager aims, and is normally able to avoid stresses greater than moderate, i.e., restricting stresses to levels that can be tolerated by the plants without incurring serious damage. The adoption of nursery regimes to equip planting stock with characteristics conferring increased ability to withstand outplanting stresses, by managing stress levels in
2576-515: Is grown under many diverse nursery culture regimes, in facilities ranging from sophisticated computerized greenhouses to open compounds. Types of stock include bareroot seedlings and transplants, and various kinds of containerized stock. For simplicity, both container-grown and bareroot stock are generally referred to as seedlings, and transplants are nursery stock that have been lifted and transplanted into another nursery bed, usually at wider spacing. The size and physiological character of stock vary with
2668-598: Is home to about two-thirds of the species in Magnoliaceae, with the remainder of the family spread across the Americas with temperate species extending into southern Canada and tropical elements extending into Brazil and the West Indies. The earliest botanical description of the Magnoliaceae as a family is in Antonii Laurentii de Jussieu's Genera Plantarum , which describes eight genera included within
2760-461: Is likely to be well founded. The physiological qualities of planting stock are hidden from the eye and must be revealed by testing. The potential for survival and growth of a batch of planting stock may be estimated from various features, morphological and physiological, of the stock or a sample thereof. The size and shape and general appearance of a seedling can nevertheless give useful indications of PSPP. In low-stress outplanting situations, and with
2852-610: Is native to southern Tibet and southern/southwestern Yunnan Provinces. In 2021, an isolated, presumably native population of M. champaca was identified in Yemen , making M. champaca the only species in the Magnoliaceae known to inhabit the Arabian Peninsula . In its native range Magnolia champaca grows to 50 metres (160 ft) or taller. Its trunk can be up to 1.9 metres (6.2 ft) in diameter. The tree has
Magnolia champaca - Misplaced Pages Continue
2944-596: Is native to the Indomalayan realm , consisting of South Asia, Southeast Asia−Indochina, and southern China. It is found in tropical and subtropical moist broadleaf forests ecoregions, at elevations of 200–1,600 metres (660–5,250 ft). It is native to the Maldives , Bangladesh , Cambodia , China , India , Indonesia , Malaysia , Myanmar , Nepal , the Philippines , Thailand , and Vietnam . In China it
3036-485: Is nursery stock that has been made ready for outplanting. The amount of seed used in white spruce seedling production and direct seeding varies with method. A working definition of planting stock quality was accepted at the 1979 IUFRO Workshop on Techniques for Evaluating Planting Stock Quality in New Zealand: "The quality of planting stock is the degree to which that stock realizes the objectives of management (to
3128-955: Is planted, undergoes any substantive physiological or physical change. In its present form, RGC testing is silviculturally useful chiefly as a means of detecting planting stock that, while visually unimpaired, is moribund. Seedling moisture content can be increased or decreased in storage, depending on various factors including especially the type of container and the kind and amount of moisture-retaining material present. When seedlings exceed 20 bars PMS in storage, survival after outplanting becomes problematical. The Relative Moisture Content of stock lifted during dry conditions can be increased gradually when stored in appropriate conditions. White spruce (3+0) packed in Kraft bags in northern Ontario increased RMC by 20% to 36% within 40 days. Bareroot 1.5+1.5 white spruce were taken from cold storage and planted early in May on
3220-790: Is reflected by changes in root activity. This is helpful in determining the readiness of stock for lifting and storing and also for outplanting after storage. Navratil (1982) reported a virtually perfect (R² = 0.99) linear relationship in the frequency of 3+0 white spruce white root tips longer than 10 mm with time in the fall at Pine Ridge Forest Nursery, Alberta, decreasing during a 3-week period to zero on October 13 in 1982.Root regenerating research with white spruce in Canada (Hambly 1973, Day and MacGillivray 1975, Day and Breunig 1997) followed similar lines to that of Stone's (1955) pioneering work in California. Simpson and Ritchie (1997) debated
3312-700: Is said to have been used as the tree for achieving enlightenment, or Bodhi, by the fourteenth Buddha called "Aththadassi – අත්ථදස්සි". According to Tibetan beliefs, the Buddha of the next era will find enlightenment under the white flower canopy of the champaca tree. It also has importance in Hindu culture. The flowers are used in South Asia, especially India, for several purposes. They are primarily used in worship ceremonies, whether at home or out in temples, they are also more generally worn in hair by girls and women as
3404-483: Is used in furniture making, construction, and cabinetry. The species is protected from logging in some states of India, especially in the Southwestern region, where certain groves are considered sacred by Hindus and Buddhists. Magnolia champaca is cultivated by specialty plant nurseries as an ornamental plant , for its form as an ornamental tree, as a dense screening hedge , and for its fragrant flowers. It
3496-460: The Magnolia genus as a sister group to the subgenus Yulania and also find that the section Rytidospermum is not monophyletic, placing some of its members in a clade with the section Oyama . The most recent research on the family continues the debate over the genera of the family. Wang et al.'s study analyzes complete chloroplast genome sequences of 86 species in the Magnoliaceae and supports
3588-509: The West Indies , tropical South America , southern and eastern India , Sri Lanka , Indochina , Malesia , China , Japan , and Korea . The number of genera in Magnoliaceae is a subject of debate. Up to 17 have been recognized, including Alcimandra , Lirianthe , Manglietia , Michelia , Pachylarnax , Parakmeria , Talauma and Yulania . However, many recent studies have opted to merge all genera within subfamily Magnolioideae into
3680-506: The Frasier magnolia, Magnolia fraseri , are harvested and marketed collectively as "yellow poplar." This is a lightweight and exceptionally fine-grained wood, lending itself to precision woodworking for purposes such as pipe organ building. Magnolias have a rich cultural tradition in China, where references to their healing qualities go back thousands of years. The Chinese have long used
3772-604: The Magnoliaceae still include anywhere from 2 to 17 genera, the broad generic concept (where one genus, Magnolia , is in the Magnolioideae) is largely accepted as a practical construction upheld by molecular and morphological evidence. Even as debates over rank persist, monophyletic groups are largely established with opportunities for further research into endangered and extinct species. The family's place as early angiosperms means that research into its taxonomy and evolutionary history contributes to our broader understanding of
Magnolia champaca - Misplaced Pages Continue
3864-458: The U.S. produce around 1.3 billion seedlings per year for reforestation projects. Nurseries grow plants in open fields, on container fields, in tunnels or greenhouses. In open fields, nurseries grow decorative trees, shrubs and herbaceous perennials. On a containerfield nurseries grow small trees, shrubs and herbaceous plants, usually destined for sales in garden centers. These have proper ventilation, sunlight etc. Plants may be grown by seeds, but
3956-466: The abaxial surface. Seeds have a fleshy coat, aril , and color that ranges from red to orange (except Liriodendron ). Magnoliaceae flowers are beetle pollinated, except for Liriodendron , which is bee pollinated. The carpels of Magnolia flowers are especially thick to avoid damage by beetles that land, crawl, and feast on them. The seeds of Magnolioideae are bird-dispersed, while the seeds of Liriodendron are wind-dispersed. Due to its great age,
4048-484: The abundance of HSPs depending on protein fraction and time of day. Without heat shock, nuclear membrane-bound HSP 73 was absent from plants in the morning and only weakly present in the afternoon, and heat shock increased the abundance of nuclear membrane. Heat shock also affected the abundance of HSP 73 in the afternoon, and caused HSP 73 to appear in the morning. In the mitochondrial and microsomal protein fractions, an afternoon heat shock reduced HSP 73 , whereas
4140-433: The amounts of nutrients in the soil. To test soil drainage, one method is to dig an 18" deep hole that is at least 4" in diameter. Fill the hole with water, and leave it for an hour. This will allow the soil to saturate. Next, fill the hole with water again but leave the top 2" of soil in the hole without water. Wait an hour then return to the hole with a measurement tool like a ruler to find out how much water has drained from
4232-436: The bark of Magnolia officinalis , a magnolia native to the mountains of China with large leaves and fragrant white flowers, as a remedy for cramps, abdominal pain, nausea, diarrhea, and indigestion. Certain magnolia flowers, such as the buds of Magnolia liliiflora , have been used to treat chronic respiratory and sinus infections and lung congestion. Recently, magnolia bark has become incorporated into alternative medicine in
4324-613: The basis of historical record of survival, growth, and total cost of surviving trees. In the Lake States, Kittredge concluded that good stock of 2+1 white spruce was the smallest size likely to succeed and was better than larger and more expensive stock when judged by final cost of surviving trees. Because age alone is an inadequate descriptor of planting stock, various codes have been developed to describe such components of stock characteristics as height, stem diameter, and shoot:root ratio. A description code may include an indication of
4416-399: The concept that larger is better negates the underlying complexities. Schmidt-Vogt (1980), for instance, found that whereas mortality among large outplants is greater than among small in the year of planting, mortality in subsequent growing seasons is higher among small outplants than among large. Much of the literature on comparative seedling performance is clouded by uncertainty as to whether
4508-487: The diurnal variability in heat tolerance of roots and shoots in black spruce seedlings 14 to 16 weeks old found in all 4 trials that shoot heat tolerance was significantly greater in the afternoon than in the morning. The trend in root heat tolerance was similar to that found in the shoots; root systems exposed to 47 °C for 15 minutes in the afternoon averaged 75 new roots after a 2-week growth period, whereas only 28 new roots developed in root systems similarly exposed in
4600-407: The divergences within and between East Asian and East North American species of Magnolia , presenting molecular evidence which shows that Dandy's section Rytidospermum is not monophyletic. Azuma et al. employ both molecular phylogeny and parsimonious mapping of the chemistry of floral scents in 1999 to propose a phylogenetic tree where, unlike Dandy's taxonomy, they include Michelia species within
4692-425: The electrical conductivity of which depends on the degree to which cell membranes have been ruptured by freezing releasing electrolyte. A −15 °C frost hardiness level has been used to determine the readiness of container stock to be moved outside from the greenhouse, and −40 °C has been the level determining readiness for frozen storage (Colombo 1997). In an earlier technique, potted seedlings were placed in
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#17327823956604784-399: The end of the rotation or achievement of specified sought benefits) at minimum cost. Quality is fitness for purpose." Clear expression of objectives is therefore prerequisite to any determination of planting stock quality. Not only does performance have to be determined, but performance has to be rated against the objectives of management. Planting stock is produced in order to give effect to
4876-416: The evolution of plant life. The development of DNA sequencing at the end of the 20th century had a profound impact on the research of phylogenetic relationships within the family. The employment of ndh F and cpDNA sequences has refuted many of the traditionally accepted phylogenetic relationships within the Magnoliaceae. For example, the genera Magnolia and Michelia were shown to be paraphyletic when
4968-463: The exception of ornamental cultivation, the economic significance of magnolias is generally confined to the use of wood from certain timber species and the use of bark and flowers from several species believed to possess medicinal qualities. The wood of the American tuliptree, Liriodendron tulipifera and the wood of the cucumbertree magnolia, Magnolia acuminata , and, to a lesser degree, that of
5060-524: The family ( Euryandra , Drymis , Illicium, Michelia , Magnolia , Talauma, Liriodendrum , and Mayna ) as well as four genera closely related to the family ( Dillenia , Curatella , Ochna , and Quassia ). Bentham and Hooker's Genera Plantarum , almost a century later, sorts the family's genera into three tribes: the Wintereae, including the genera Drimys and Illicium , the Magnolieae, including
5152-440: The first half of the growing season, PSIm was below turgor loss point. The osmotic potential at turgor loss point decreased after planting to -2.3 MPa 28 days later. In the greenhouse, minimum values of PSIT were -2.5 MPa (in the first day after planting. the maximum bulk modulus of elasticity was greater in white spruce than in similarly treated jack pine and showed greater seasonal changes. Relative water content (RWC) at turgor loss
5244-657: The forest policy of the organization. A distinction needs to be made between "planting stock quality" and "planting stock performance potential" (PSPP). The actual performance of any given batch of outplanted planting stock is determined only in part by the kind and condition, i.e., the intrinsic PSPP, of the planting stock. The PSPP is impossible to estimate reliably by eye because outward appearance, especially of stock withdrawn from refrigerated storage, can deceive even experienced foresters, who would be offended if their ability were questioned to recognize good planting stock when they saw it. Prior to Wakeley's (1954) demonstration of
5336-559: The genera Talauma, Magnolia, Manglieta, Michelia , and Liriodendron , and the Schizandreae, including the genera Schizandra and Kadsura . In his following work Adansonia , Baillon recognizes Bentham and Hooker's changes and additions but proposes an alternative taxonomy where he sets aside the Tulipier genus and include all remaining genera under one Magnolieae tribe. From this basic separation, scholars have continued to debate
5428-488: The genus Magnolia . Thus, Magnoliaceae would include only two extant genera, Magnolia and Liriodendron . The monophyly of Magnoliaceae is supported by a number of shared morphological characters among the various genera in the family. Most have bisexual flowers (with the exception of Kmeria and some species of Magnolia section Gynopodium ), showy, fragrant, radial, and with an elongated receptacle. Leaves are alternate, simple, and sometimes lobed. The inflorescence
5520-512: The geographical distribution of the Magnoliaceae has become disjunct or fragmented as a result of major geologic events such as ice ages , continental drift , and mountain formation . This distribution pattern has isolated some species, while keeping others in close contact. Extant species of the Magnoliaceae are widely distributed in temperate and tropical Asia from the Himalayas to Japan and southwest through Malaysia and New Guinea . Asia
5612-515: The growing season. The greater efficiency of water use in newly transplanted 3-year-old white spruce seedlings under low levels of absolute humidity difference in water-stressed plants immediately after planting helps explain the commonly observed favourable response of young outplants to the nursing effect of a partial canopy. Silvicultural treatments promoting higher humidity levels at the planting microsite should improve white spruce seedling photosynthesis immediately after planting. Planting stock
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#17327823956605704-448: The hole. The corresponding measurements will allow the tester to decide what type of drainage capacity their soil has. If the water level drops 1/2" or less it is poor draining. If water drops 1/2" to 1", it drains at a medium rate. 1"< means that the soil drains quickly. Seedlings vary in their susceptibility to injury from frost. Damage can be catastrophic if "unhardened" seedlings are exposed to frost. Frost hardiness may be defined as
5796-563: The importance of the physiological state of planting stock in determining the ability of the stock to perform after outplanting, and to a considerable extent even afterwards, morphological appearance has generally served as the basis for estimating the quality of planting stock. Gradually, however, a realization developed that more was involved. Tucker et al. (1968), for instance, after assessing 10-year survival data from several experimental white spruce plantations in Manitoba noted that "Perhaps
5888-407: The length of growing period and with growing conditions. Until the technology of raising containerized nursery stock bourgeoned in the second half of the twentieth- century, bareroot planting stock classified by its age in years was the norm. The number of years spent in the nursery seedbed by any particular lot of planting stock is indicated by the 1st of a series of numbers. The 2nd number indicates
5980-417: The lower end of the scale are usually culled to an arbitrary limit, but, especially among bareroot stock, the range in size is commonly considerable. Dobbs (1976) and McMinn (1985a) examined how the performance of 2+0 bareroot white spruce related to differences in initial size of planting stock. The stock was regraded into large, medium, and small fractions according to fresh weight. The small fraction (20% of
6072-508: The minimum temperature at which a certain percentage of a random seedling population will survive or will sustain a given level of damage (Siminovitch 1963, Timmis and Worrall 1975). The term LT 50 (lethal temperature for 50% of a population) is commonly used. Determination of frost hardiness in Ontario is based on electrolyte leakage from mainstem terminal tips 2 cm to 3 cm long in weekly samplings (Colombo and Hickie 1987). The tips are frozen then thawed, immersed in distilled water,
6164-463: The morning. HSP 73 was detected in black spruce nuclear, mitochondrial, microsomal, and soluble protein fractions, while HSP 72 was observed only in the soluble protein fraction. Seedlings exhibited constitutive synthesis of HSP 73 at 26 °C in all except the nuclear membrane fraction in the morning; HSP levels at 26 °C in the afternoon were higher than in the morning in the mitochondrial and microsomal protein factions. Heat shock affected
6256-560: The most common method is by planting cuttings, which can be taken from shoot tips or roots. With the objective of fitting planting stock more able to withstand stresses after outplanting, various nursery treatments have been attempted or developed and applied to nursery stock. Buse and Day (1989), for instance, studied the effect of conditioning of white spruce and black spruce transplants on their morphology, physiology, and subsequent performance after outplanting. Root pruning, wrenching, and fertilization with potassium at 375 kg/ha were
6348-443: The most important point revealed here is that certain lots of transplants performed better than others", even though all transplants were handled and planted with care. The intuitive "stock that looks good must be good" is a persuasive, but potentially dangerous maxim. That greatest of teachers, Bitter Experience, has often enough demonstrated the fallibility of such assessment, even though the corollary "stock that looks bad must be bad"
6440-457: The needles, but these are not apparent in white spruce. Whether in the forest or in the nursery, seedling growth is fundamentally influenced by soil fertility , but nursery soil fertility is readily amenable to amelioration, much more so than is forest soil. Nitrogen , phosphorus , and potassium are regularly supplied as fertilizers, and calcium and magnesium are supplied occasionally. Applications of fertilizer nitrogen do not build up in
6532-413: The nursery to "condition" planting stock to increase tolerance to various post-planting environmental stresses, has become widespread, particularly with containerized stock. Outplanted stock that is unable to tolerate high temperatures occurring at soil surfaces will fail to establish on many forest sites, even in the far north. Factors affecting heat tolerance were investigated by Colombo et al. (1995);
6624-536: The original stock) had barely one-quarter of the dry matter mass of the large fraction at the time of outplanting. Ten years later, in the blade-scarified site, seedlings of the large fraction had almost 50% greater stem volume than had seedlings of the small fraction. Without site preparation, large stock were more than twice the size of small stock after 10 years. Similar results were obtained with regraded 2+1 transplants sampled to determine root growth capacity. The large stock had higher RGC as well as greater mass than
6716-433: The production and roles of heat shock proteins (HSPs) are important in this regard. HSPs, present constitutively in black spruce and many other, perhaps most, higher plants are important both for normal cell functioning and in a stress response mechanism following exposure to high, non-lethal temperature. In black spruce at least, there is an association between HSPs and increased levels of heat tolerance. Investigation of
6808-402: The proposition that root growth potential of planting stock predicts field performance; their conclusion was that root growth potential, as a surrogate for seedling vigor, can predict field performance, but only under such situations as site conditions permit. Survival after planting is only partly a function of an outplant's ability to initiate roots in test conditions; root growth capacity is not
6900-476: The rate, and care must be taken to avoid overheating. Navratil (1982) found that closed containers in cold storage averaged internal temperatures 1.5 °C to 2.0 °C above the nominal storage temperature. Depletion of reserves can be estimated from the decrease in dry weight. Cold-stored 3+0 white spruce nursery stock in northern Ontario had lost 9% to 16% of dry weight after 40 days of storage. Carbohydrates can also be determined directly. The propensity of
6992-451: The remaining four genera of the Magnolioideae are split out. In fact, even many of the subgenera ( Magnolia subg. Magnolia , Magnolia subg. Talauma ) have been found to be paraphyletic. Although no completely resolved phylogeny for the family has yet been determined, these technological advances have allowed systematists to broadly circumscribe major lineages. As a whole, the Magnoliaceae are not an economically significant family. With
7084-402: The rigors of the outplant site. Nutrients in oversupply can reduce growth or the uptake of other nutrients. As well, an excess of nutrient ions can prolong or weaken growth to interfere with the necessary development of dormancy and hardening of tissues in time to withstand winter weather. Nursery stock size typically follows the normal curve when lifted for planting stock. The runts at
7176-469: The scent of this plant is said to be emitted by a civet in Sri Lanka , Paradoxurus montanus . Because all the other civets are known to emit very unpleasant odours, this species is renowned for emitting a pleasant odour similar to this plant's scent. In its native India and Southeast Asia, champaca is logged for its valuable timber . It has a finely textured, dark brown and olive-colored wood, which
7268-401: The site. Irrigation Plants need water to grow. Water needs will vary depending on plant species, weather, and soil. An example is in Ontario, irrigation water is used most in late spring and in summer, when plants need water most, and based on climate patterns in Ontario, this time is also when there is the least amount of rainfall. Some nurseries will create water sources by building
7360-485: The small stock fraction. The value of large size at the time of planting is especially apparent when outplants face strong competition from other vegetation, although high initial mass does not guarantee success. That the growth potential of planting stock depends on much more than size seems clear from the indifferent success of the transplanting of small 2+0 seedlings for use as 2+1 "reclaim" transplants. The size of bareroot white spruce seedlings and transplants also had
7452-496: The soil to develop any appreciable storehouse of available nitrogen for future crops. Phosphorus and potassium, however, can be accumulated as a storehouse available for extended periods. Fertilization permits seedling growth to continue longer through the growing season than unfertilized stock; fertilized white spruce attained twice the height of unfertilized. High fertility in the rooting medium favours shoot growth over root growth, and can produce top-heavy seedlings ill-suited to
7544-444: The sole predictor of plantation performance. Some major problems militate against greater use of RGC in forestry, including: unstandardized techniques; unstandardized quantification; uncertain correlation between quantified RGC and field performance; variability within given, nominally identical, kinds of planting stock; and the irrelevance of RGC test values determined on a sub-sample of a parent population that subsequently, before it
7636-487: The spring for export to colder regions where propagation could not have been started so early or to regions where seasonal pests prevent profitable growing early in the season. There are a number of different types of nurseries, broadly grouped as wholesale or retail nurseries, with some overlap depending on the specific operation. Wholesale nurseries produce plants in large quantities which are sold to retail nurseries Wholesale nurseries may be small operations that produce
7728-574: The spruces. With black spruce and jack pine, but not with white spruce, Grossnickle and Blake's (1987) findings warrant mention in relation to the bareroot-containerized debate. During the first growing season after outplanting, containerized seedlings of both species had greater needle conductance than bareroot seedlings over a range of absolute humidity deficits. Needle conductance of containerized seedlings of both species remained high during periods of high absolute humidity deficits and increasing plant moisture stress. Bareroot outplants of both species had
7820-435: The stock, led to attempts to test the physiological condition of planting stock, particularly to quantify the propensity to produce new root growth. New root growth can be assumed to be necessary for successful establishment of stock after planting, but although the thesis that RGC is positively related to field performance would seem to be reasonable, supporting evidence has been meager. The physiological condition of seedlings
7912-475: The stocks being compared share the same physiological condition; differences invalidate such comparisons. Height and root-collar diameter are generally accepted as the most useful morphological criteria and are often the only ones used in specifying standards. Quantification of root system morphology is difficult but can be done, e.g. by using the photometric rhizometer to determine intercept area, or volume by displacement or gravimetric methods. Planting stock
8004-478: The systematics of the family. Dandy's taxonomic proposal in 1927 sets aside the genus Liriodendron as a part of the subfamily Liriodendreae and includes Bentham and Hooker's four genera in addition to four more ( Kmeria, Pachylarnax, Alcimandra , and Elmerrillia ) within the Magnolieae tribe. Dandy's model with eleven genera was widely accepted until molecular evidence brought it into question (Figlar, 2019). Qiu et al. analyzed molecular data in 1995 to investigate
8096-436: The treatments applied. Root pruning and wrenching modified stock in the nursery by decreasing height, root collar diameter, shoot:root ratio, and bud size, but did not improve survival or growth after planting. Fertilization reduced root growth in black spruce but not of white spruce. For a nursery to produce healthy crops, they must manage many factors, a few of them being irrigation, landscape topography, and soil conditions of
8188-418: The west, where tablets made from the bark of M. officinalis have been marketed as an aid for anxiety, allergies, asthma, and weight loss. Compounds found in magnolia bark might have antibacterial and antifungal properties, but no large-scale study on the health effects of magnolia bark or flowers has yet been conducted. Plant nursery A nursery is a place where plants are propagated and grown to
8280-406: The years subsequently spent in the transplant line, and a zero is shown if indeed there has been no transplanting. A 3rd number, if any, would indicate the years subsequently spent after a second lifting and transplanting. The numbers are sometimes separated by dashes, but separation by plus sign is more logical inasmuch as the sum of the individual numbers gives the age of the planting stock. Thus 2+0
8372-430: Was 80-87%. Available turgor (TA), defined as the integral of turgor over the range of RWC between PSIb and xylem pressure potential at the turgor loss point) was 4.0% for white spruce at the beginning of the season compared with 7.9% for jack pine, but for the rest of the season TA for jack pine was only 2%, to 3% that of white spruce. Diurnal turgor (Td), the integral of turgor over the range of RWC between PSIb and PSIm, as
8464-586: Was 97%, with no significant differences in survival among stock types. The 1.5+1.5 stock with a mean height of 234 cm was significantly taller by 18% to 25% than the other stock types. The 1.5+1.5 stock also had significantly greater dbh than the other stock types by 30-43%. The best stock type was 57 cm taller and 1 cm greater in dbh than the poorest. Lifting date had no significant effect on growth or survival. High elevation sites in British Columbia's southern mountains are characterized by
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