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林木
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  forest
    Water condition is reluctantly satisfied for the requirement of tree growth in forest zone.
    森林带的水分条件可满足林木成材对水分的需求,林木采伐后土壤水分可得到很好恢复;
短句来源
    The effects of different intercrop modes and densities of poplar with grain on growth of poplar and net benefit were studied by field experiments and statistical analysis. The results showed that poplar intercropping with grain increase forest growth as well as agriculture income,providing theoretial basis for the technology spreading of intercropping poplar and grain.
    通过进行相同密度不同林龄间作试验、相同林龄不同间作模式对林木生长的影响试验、杨树轮伐期内不同间作模式经济效益对比、不同间作密度对杨树生长影响试验 ,分析了杨粮间作的经济效益 ,得出了杨粮间作对提高林木生长量、提高农业收入具有重要作用 ,为开展杨粮间作技术推广提供了理论依据。
短句来源
    The results showed that slope runoff head loss was related to slope gradient,forest density,net rainfall intensity and slope length. The relationship of water head loss with the distance among trees and the diameter at the ground of tree was E∝(D/b)~(4/3).
    结果表明,坡面径流水头损失与坡面坡度、林木密度、净雨强、坡长等有关,水头损失与林木间距(b)和树木地径(D)间的关系为:E∝(D/b)4/3;
短句来源
    Rainfall Collecting Techniques and Soil Moisture Environment for forest Growth
    集水技术与林木生长的土壤水环境研究
短句来源
    At present, studies on soil water displacement pursue mostly pure farmingland and pure forest field, and it has less study on agri-forestry system of its soil water movement. Ifthere are some, most study the impacts of soil water content on forest growth, crops growth or itsproductivity.
    目前,关于土壤水分运移的研究,绝大多数是针对纯农田或纯林地的,农林复合生态系统土壤水分运动的研究还很少,且大都局限于探讨土壤含水量对林木生长、作物生长以及产量的影响等。
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  “林木”译为未确定词的双语例句
    An Influnce on the Eruption of Arboreal Seed Effected by He-Ne Laser Radiation
    He-Ne激光对林木种子萌发的影响
短句来源
    Study on the Spatial Distribution Root System of Chinese Prickly Ash and Wheat Agri-forestry in Weibei Arid-plain Area
    渭北旱塬花椒-小麦复合系统中林木及作物根系空间分布特征研究
短句来源
    Effects of Forests on Slope Stability in the Granite Mountainous Area of the Three Gorges Reservoir Area
    三峡库区花岗岩山地林木对坡面稳定性影响的研究
短句来源
    Study on Agroforestry Management-Effects of Rotation of Eucalptus Plantation with Pineapple on Trees and Soil
    农林复合经营研究──菠萝与桉树轮作对林木生长和土壤的影响
短句来源
    The shading and its effect on crop yield under poplar-crop intercropping system.
    农林间作系统林木遮荫及其对产量的影响
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  forest
Moreover, a backward reasoning forest of a reachable marking was generated for explicitly representing reachable paths in RBS.
      
Growth Model System for National Continuous Forest Inventory
      
A Growth Model System is developed for data updating and forecasting of the national continuous forest inventory.
      
Its design is based on the inherent forest growth laws, and its parameters are estimated by modern regression methods.
      
It is suitable for forest resource information updating and forecasting for a large region, e.g., a province.
      
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  forest trees
The results showed that the forest trees grew in a clumped pattern in the stage dominated by the pioneer trees, and that the trees were distributed in a random pattern in the stage dominated by the companion trees or in the mature stage.
      
From population genetics to population genomics of forest trees: Integrated population genomics approach
      
Reducers in the Plant Debris of Wild Fruit and Forest Trees and Shrubs on Sandy Lands in the Semidesert Zone of Stavropol Krai
      
Since the shola forest trees are characterized by their short stature with low to medium girth, about 89% of the total number of deadwood is of the size ranging from 10.1 cm to 40.0 cm in diameter.
      
Some progresses of transferring and expressing Bt toxin gene in forest trees are offered with a discussion on the limits and future prospects of using Bt products in forestry.
      
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Because of the very low boiling point(-55℃),sulphuryl fluoride

本文主要是介绍农业部植检所和有关单位共同协作进行的应用技术方面的研究结果。杀虫效果方面:室内试验得出:对谷斑皮蠹成虫、幼虫、蛹,温度11~14℃,10克/m~3,处理24~48小时,效果100%。对谷斑皮蠹卵,温度11~14℃,15~50克/m~3,处理24小时,效果9.0~62.5%,50克/m~3处理48小时,40克/m~3处理72小时效果100%,温度20~22℃,40克/m~3处理24小时,15克/m~3处理48小时也100%死亡。对谷象、玉米象、绿豆象的卵,温度20℃,15克/m~3处理48小时效果100%。对胚后期的黑皮蠹、烟草坪,印度谷蛾幼虫、玉米象、谷蠹和绿豆象成虫的效果更好。室外粮垛上试验,粮温15~16℃,50~70克/m~3处理24小时,对玉米象和绿豆象各虫态的效果100%。中草药材垛上试验,温度27~28℃,30克/m~3处理二天,对黑皮蠹幼虫、玉米象各虫态以及锯谷盗成虫效果100%。真空熏蒸,真空度负745~720mmHg,温度12~20℃,70克/m~3处理3小时,对谷象和绿豆象卵的效果方能100%。熏蒸粮食残留量测定结果:20~70克/m~3熏蒸3天,小麦中氟残留量为0.55~1...

本文主要是介绍农业部植检所和有关单位共同协作进行的应用技术方面的研究结果。杀虫效果方面:室内试验得出:对谷斑皮蠹成虫、幼虫、蛹,温度11~14℃,10克/m~3,处理24~48小时,效果100%。对谷斑皮蠹卵,温度11~14℃,15~50克/m~3,处理24小时,效果9.0~62.5%,50克/m~3处理48小时,40克/m~3处理72小时效果100%,温度20~22℃,40克/m~3处理24小时,15克/m~3处理48小时也100%死亡。对谷象、玉米象、绿豆象的卵,温度20℃,15克/m~3处理48小时效果100%。对胚后期的黑皮蠹、烟草坪,印度谷蛾幼虫、玉米象、谷蠹和绿豆象成虫的效果更好。室外粮垛上试验,粮温15~16℃,50~70克/m~3处理24小时,对玉米象和绿豆象各虫态的效果100%。中草药材垛上试验,温度27~28℃,30克/m~3处理二天,对黑皮蠹幼虫、玉米象各虫态以及锯谷盗成虫效果100%。真空熏蒸,真空度负745~720mmHg,温度12~20℃,70克/m~3处理3小时,对谷象和绿豆象卵的效果方能100%。熏蒸粮食残留量测定结果:20~70克/m~3熏蒸3天,小麦中氟残留量为0.55~1.48ppm,水稻中为0.29~2.48ppm,玉米中为0.09~1.51ppm。熏蒸粉类粮食残留量高。硫酰氟熏蒸粮、棉、油、蔬菜以及林木种籽,对发芽安全。粮食在熏蒸期间对硫酰氟的吸附量,以大豆和玉米为例,分别只有溴甲烷吸附量的36%,20.3%

Over Three hundred thousand kilograms of masson pine seeds were needed for afforestation by aerial sowing in Guang Xi each years. The top amount reached four hundred and fifty thousand kilograms in some years. Most of the seeds were collected by people and purchased by the forest departments. The quality and the-class of seeds must be appraised and divided in the shortest time during purchasing. According to the inspection method of the forest seeds(Ministry Standard), the rectilinear correlative relation between...

Over Three hundred thousand kilograms of masson pine seeds were needed for afforestation by aerial sowing in Guang Xi each years. The top amount reached four hundred and fifty thousand kilograms in some years. Most of the seeds were collected by people and purchased by the forest departments. The quality and the-class of seeds must be appraised and divided in the shortest time during purchasing. According to the inspection method of the forest seeds(Ministry Standard), the rectilinear correlative relation between viability and germination percentage was found while doing a research for the correlated coefficient of the viability and germination percentage in masson-pine seeds. Set up a rectilinear equation then calculated the correclated coefficient of the viability and the germination percentage, it is very useful to the seeds bussiness activties.

广西每年飞播造林需要马尾松种子30万千克以上,有些年份高达45万千克。而大部分种子领先群众采集,林业部门收购,在林木种子经营活动中,收购种子需要在最短时间之内鉴定出种子质量等级,所以,根据林木种子检验方法(部颁标准),对马尾松种子生活力与发芽率相关系数作了研究,发现存在直线相关关系,建立直线方程,计算出生活力与发芽率之间的相关系数,在林木种子经营活动中是很有实用价值意义的。

In this Paper,the effects of contiol burnhng on Losses of soil organic material and nutrient,the erosion lossesof water and soil, soill fertility, treegrowth and underplant species in ecosystem of young Ohinese fir plantation were introduced in detail. Aimming atn unfavourable ecologicajcal results, the strategies and technologies for its prevention are alsoiscussed. These can provide theory basisfor rational evaluating and reforming Cotrol burningmethod.

详细介绍了炼山对杉木幼林生态系统的土壤有机质和养分烧失、水土流失、土壤肥力、林木生长及林下植被种类的影响,并针对炼山的不利生态后果,提出了几点防治对策。为合理地评价和改革炼山制度提供理论依据。

 
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