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- Effects of forest stand density on wood properties of Casuarina equisetifolia plantations 林分密度对木麻黄人工林木材性质的影响
- Estimation and mapping of forest stand density, volume, and cover type using the K-nearest neighbors method 用K-最近邻方法估算和标绘森林立木密度、材积及植被型
- forest stand density 林分密度
- The average population density is above 118 in the forest stand that robur can account for 90% , and 50 in a forest stand that robur account for 40% . 虫口密度与林分组成的关系为栎树纯林和栎树比例在9以上的林分平均虫口在118头／株以上,危害重;而栎树比例在4以下的林分平均虫口在50头／株以上,危害轻。
- Quantitative Estimation for Forest Stand Crown of Different Stand Densities by Remote Sensing 不同密度林分冠幅的遥感定量估计
- To clarify the relation between the pollen percentage of Larix and its stand density, surface samples from tundra, forest tundra and taiga in the Far East Russia were analyzed. 为了搞清楚落叶松花粉百分比和实际森林密度的关系,我们系统地分析了从苔原、森林苔原以及泰加林的表土样品。
- Stand density was reduced from 404 to 387 stem/hm 2,and basal area from 44 83 to 43 79 hm 2.All species in high canopy layer except Acer mono decreased in number of stems. 林分密度从404株/hm2降至387株/hm2，而基础面积从44.;83hm2降至43
- The results showed that Pielou evenness index, gap-fraction, openness, stand basal area, and stand density were influenced by spatial structure of the community at a broad scale. 结果表明,群落均匀度指数、空隙度和开度、林分胸高断面积和林分密度在大尺度上表现出显著的空间结构。
- Our research finds that the living needles can pyrolyze easily.The decomposition of needles can result in the total reduction of heat of forest stand from DSC thermogram. 且由活松针与上下层枯落松针之高低温热解曲线之变化，说明松叶腐化过程对林分整体热含量之减低有其作用。
- In urbanizing area, there were three major land use types, i.e., urban building, ecological regulation (mainly forest stand), and agricultural production (mainly crop land). 在不同的城乡梯度带;城市化地区城建用地、生态用地和生产用地3种主要土地利用方式的价值输出不同.
- In the midst of the endless pine forest stood a single group of oak trees. 在无边无际的松林当中,有一小丛橡树。
- The relationship between plantation productivity and stand density as well as the distribution law ofthe above ground biomass tbr Pinus sylvestris var. mongolica were preliminarily analyzed. 根据生物量调查资料，对樟子松人工林生物生产力与密度的关系以及樟子松各器官生物量的分配规律做了初步分析。
- Based on foregoing information, density index of stand was led into drowing control chart of stand density into variable-density yield table so that the outputting results between chart and. 引入林分密度指数，将林分密度控制图导成可变密度收获表，保证了图表之间输出结果的一致性，为可变密度收获表的编制提供了一种方法。
- The results also showed that when they were in mid-age, the water holding ability of the litter in the mixed forest stand of broadleaf and conifer was higher than that of the litter in the pure broadleaf or in the pure conifer forest stand. 研究结果还表明 ;在同为中龄林条件下 ;三峡库区针阔混交林林下枯落物持水能力大于阔叶树纯林或针叶树纯林林下枯落物持水能力 .
- Are you willing to stand surety for your brother? 你愿意当你弟弟的保证人吗？
- It is suitable for developing water sports.Along the bank, casuarina equisetifolia forest stands there. 沿岸有大片木麻黄林，可为森林活动提供宽阔的腹地空间。
- But Yi Hong was like the stone forest standing tall by the river;proud, jagged, and seemingly thrusting into the heart of heaven! 而衣红却像耸立江畔的石林，傲骨嶙峋，直插天心！
- The forest will act as a defense against desert dust. 森林能起防御沙漠灰沙的作用。
- How much do they stand to lose by this merger? 这次合并，他们要遭受多大损失？
- Stand clear of the swinging boom of the crane. 不要走近转动的超重机吊杆。
