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造林树种生态适应性评价研究进展 总被引：1，自引：0，他引：1
简述了树种选择和立地类型研究这两个造林的必备条件,综述了单一树种、同类树种、多类树种在不同立地条件下的生态适应性评价方法。旨在通过对不同立地条件下树木生长表现出的差异性进行生态适应性评价,确定不同立地类型适宜的造林树种,为选择造林树种提供依据。 相似文献
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阔叶树种造林试验与生长效果分析 总被引：1，自引：0，他引：1
在将乐国有林场开展台湾桤木、酸枣、毛红椿、白花树等10个阔叶树种的短周期工业原料林造林试验,通过对其适应性和9a来的生长情况分析,得出:台湾桤木、白花树2个树种可作为短周期工业原料林在当地推广应用;2种不同密度造林对高、径和材积的生长影响,因树种不同而不同,因此在培育短周期工业原料林时宜根据不同树种而采用其适宜的密度造林。 相似文献
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《浙江林业科技》2015,(1)
通过完全随机试验,调查并分析了9种处理方法对普陀樟(Cinnamomum japonicum var.chenii)、木荷(Schima superba)、湿地松(Pinus elliottii)3个树种造林成活率、高生长及地径生长等指标的影响,结果表明:不同处理对3个树种造林成活率的影响差异较为显著,而对同一树种成活率的影响差异不显著;不同处理对不同树种高生长量和地径生长量之间差异极显著;选择高生长、地径生长、成活率及造林成本4个指标,利用隶属函数法对普陀樟、木荷、湿地松3个树种在9种处理条件下的造林效益进行综合评价,结果表明对于3个树种施肥100 g、保水剂15 g处理条件下造林综合效益最高。 相似文献
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通过对甘肃康南林区近十年日本落叶松植苗造林后,幼林生长状况连续调查对比分析显示:本区整体对日本落叶松造林适宜、树种适生,但不同立地要素对日本落叶松幼林生长影响显著。选择最佳地域造林,其丰产性能得到极大发挥,生长迅速,林木生长势强,林地生物量积累快,生产力高,极丰产,树种抗逆性明显增强;选择次生区造林,其丰产性能不同程度受阻,制约了本树种速生、丰产特性,林分生长状况差于优生区。 相似文献
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针对弥渡县少林、造林树种单一和林业发展需要,根据适地适树的原则,结合该县自然地理条件,选择出比较适合该县生长的造林树种63种次,分别林种列表介绍了各树种的特性、生境条件等,并根据树种的生物学物性、立地条件、造林目的和当地经济条件,分别不同林种、树种配置了相应的造林密度。 相似文献
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温岭市盐碱地适生树种引种试验初探 总被引：1，自引：0，他引：1
通过造林试验区实地种植和室内不同含盐泥质基质试验,调查各试验树种的成活率、生长节律和抗盐能力,筛选出适合本地盐碱地造林的树种。 相似文献
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《Forest Ecology and Management》1997,98(1):49-60
A red alder planting spacing study was used to compare three modeling approaches that have been successfully used for other tree species. These three approaches predict stand structure and dynamics in plantations that are 7 to 16 years old, with planting densities of 976 to 13 899 trees/ha. The diameter-distribution-prediction approach tended to over-predict the diameter at breast height (dbh) for larger trees in stands planted at low density and to under-predict dbh for smaller trees in stands planted at high density. This approach may be useful for comparing planting densities when a tree list is not available. The stand-table-projection approach tended to under-predict dbh for smaller trees in young stands planted at low density and to over-predict dbh for smaller trees in young stands planted at high density. This approach, however, provided consistency between stand- and tree-level growth projections, and should be useful for comparing planting densities when a tree list is available. The individual-tree-growth approach provided the best representations of observed diameter distributions at all planting densities, stand ages, and growth intervals. This approach may be best suited for stands that have been thinned, stands with mixtures of species, and stands with heterogeneous size classes. 相似文献
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大叶榉人工栽培技术研究 总被引：9，自引：0，他引：9
榉树是国家二级保护树种，人工大面积栽培在国内尚未见报道。实践证明，榉树人工造林后生长良好。１年生苗高平均可在１ｍ以上，最高达１。７５ｍ，１０年生树，年平均高生长０．７８ｍ，胸径０．７２ｃｍ，优于同等条件下的马尾松，次于杉树，是优良的速生硬阔叶树种。人工林５０年可达工艺成熟，每亩年平均利润约７０００元，宜种子繁殖。 相似文献
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以青海省格尔木市为例,分析了影响树木生长的原因,探讨了种植树木对生态环境的有利影响,为城市生态环境建设提供了有益的探索。 相似文献
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J. Eastham P. R. Scott R. A. Steckis A. F. M. Barton L. J. Hunter R. J. Sudmeyer 《Agroforestry Systems》1993,21(3):223-237
Survival and growth were investigated for 10Eucalyptus species and 2 fodder tree species planted for salinity control in the wheatbelt of Western Australia. After two years of growth the trees were harvested to determine fodder biomass production and yields of cineole from the eucalyptus leaf oil. Subsequent harvests were conducted at three and five years after planting.At each harvest, biomass production from fodder species was greater than from most species of eucalypts. Biomass yields from eucalypts were variable, and there were no consistent trends in the productivity of the different species for the three harvests.Leaf cineole concentrations and cineole yields were low after two years of growth, but after three and five years cineole yields were generally higher from all species.E. kochii subspp.plenissima andkochii, E. horistes, E. radiata andE. angustissima produced consistently high cineole yields after three and five years. These species appear to have potential for the production of high grade eucalyptus oil in the wheatbelt of Western Australia. 相似文献
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尾叶桉、细叶桉、赤桉、粗皮桉、巨桉（简称桉树类，下同）和马占相思、粗果相思及薄果相思（简称相思类，下同）等８个树种，在水土严重流失的贫瘠丘陵地经７年的生长试验，结果表明：除巨桉和细叶桉在该立地生长较缓慢外，其余６个树种生长快，产量较高。尤其是尾叶桉和马占相思，７年生胸径年均生长量在１．０ｃｍ以上，单位面积生物量（地上部分鲜重，下同）为５２．６９ｔ／ｈｍ２和４３．６７ｔ／ｈｍ２。不同树种的生长比较：桉树类树种（除巨桉外）４年生以前胸径、树高和生物量生长均比相思类树种生长快，４年后相思类树种逐渐赶上或超过桉树类树种。性状生长高峰期分别为：胸径桉树类为２年生（细叶桉１年生）、相思类为３～４年生，树高桉树和相思类均为１年生，生物量桉树类为２～３年生、相思类为４～６年生。 相似文献
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为了指导河北省滦平县的苹果栽植,以3a生国光苹果苗木为试材,研究了不同栽植时期苗木的成活率及生长情况,结果表明,4月8日栽植的苗木成活率、下部小主枝上的长梢数分别为92.67%、9.26个,极显著高于4月15日和4月22日栽植的处理;新梢平均长度为39.93cm,显著高于4月15日和4月22日栽植的处理;单株长梢数13.73个,显著高于4月22日栽植的处理。4月15日栽植的苗木成活率、下部小主枝萌芽率、下部小主枝上的长梢数分别为75.67%、39.71%、7.58个,极显著高于4月22日栽植的处理;单株中梢数为14.95个,显著高于4月22日栽植的处理。3个栽植时期的地径、单株短梢数和叶丛枝数无显著差异。表明4月8日栽植苹果苗木的生长情况优于后面的2个时期,在滦平县4月份内栽植苹果苗木应越早越好。 相似文献
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Mirco PlathKarsten Mody Catherine PotvinSilvia Dorn 《Forest Ecology and Management》2011,261(3):741-750
Plantations of native timber species established on former pasture are a potential strategy to reduce the logging pressure on remnant natural forests in the tropics. Such plantations may help to mitigate or reverse the negative impacts of land degradation, and they may contribute to the long-term livelihood of livestock farmers. Planting native trees is, however, perceived as a risky activity due to limited knowledge of their performance and due to marked losses of newly established seedlings attributed to insect pests. Our study focuses on the small-scale effects of environmental heterogeneity, tree diversity and insecticide treatment on the performance of three native Central American timber species two years after establishment, and on damage inflicted by insect herbivores. Growth, survival and herbivore leaf damage were quantified for Anacardium excelsum (Anacardiaceae), Cedrela odorata (Meliaceae) and Tabebuia rosea (Bignoniaceae) planted in an experiment in Panama as (1) monocultures, (2) mixed stands, and (3) mixed stands protected by insecticides. Our study revealed that small-scale effects can have a substantial impact on the success of timber trees planted on former pasture. Growth performance and survival of the three species was strongly affected by small-scale environmental heterogeneity, which was expressed as significant differences in growth and survival among different plantation plots at the same study site. Establishment of trees in mixed stands did not have significant effects on tree survival and growth compared to pure stands, although it reduced herbivore pressure in one of the studied tree species. All tree species grew best and suffered lowest leaf damage when protected by insecticides, indicating a general influence of insect herbivory on growth of newly established trees. In contrast to growth performance, survival was not significantly affected by different management practices or herbivory. The large variability among plots in tree survival and growth, and also in the effects of management practices such as planting design and insecticide treatment, emphasizes the importance of small-scale environmental heterogeneity on tree survival and growth. 相似文献
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Amounts of total and extractable major nutrients have been measuredin soils under a variety of tree plantations at three sitesin Lowland Britain. The measurements repeat a study performedat these sites 23 years previously. Comparisons are made betweentotal stocks of litter and soil nitrogen, phosphorus, potassiumand calcium under broadleaved and coniferous trees planted oncontrasted lowland soils. Accumulation is shown under some conifersbut few broadleaves except for alder, under which progressiveincreases in nitrogen are suggested. Nutrient stocks are shownto be related to growth rate. The results reported also lendsome support to the view that the effects of different treespecies on development of soil properties are less significant,when viewed over a whole rotation, than measurements made earlyin the rotation, especially in the canopy closure to first thinningperiod, would suggest. 相似文献
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Many forest plantations in the humid neo-tropics are established on degraded soils in abandoned pasture land and, with some exceptions, the species planted have not grown successfully. Studies of adaptability and growth under these conditions are scarce, particularly for native species. In this paper we present data on growth and tree form at 3 years of age for 11 species planted in abandoned pastures. The research plantation was established at La Selva Biological Station, in the Atlantic lowlands of Costa Rica (10° 26′N, 83° 59′W). Survival, diameter at breast height (DBH), total height, basal area, volume index and tree form were used to evaluate the species performance. After 3 years, Vochysia guatemalensis displayed a survival significantly higher (98%) than that of the other species. The lowest survival was 75% for Pinus tecunumanii. There were significant differences in growth measures among species. Acacia mangium exhibited significantly higher growth rates than the other species. Although this species grew rapidly, it did not develop straight single stems. About 14% of trees of A. mangium had bifurcation below DBH and more than 50% showed multiple axes or branches as large in diameter as the principal axis. The native species with the highest growth rate was Vochysia guatemalensis (DBH 12.7 cm, total height 7.5 m, volume index 55 m3 ha−1 at 3 years of age). Vochysia ferruginea exhibited a slightly lower growth rate. Both Vochysia species were ranked highly with regard to tree form, with more than 80% straight single stemmed trees. The lowest growth rates were exhibited by Pentaclethra macroloba, Pithecellobium macradenium and Virola koschnyi; however, the latter two species formed straight single terms. Pentaclethra macroloba and Inga edulis failed to form straight single stems. In general, the growth rates of the species studied were high in comparison with results reported from other tree plantations in the tropics. In spite of this, it is not prudent to draw final conclusions on the basis of these 3 year measurements. 相似文献