stand density的例句大全

It was suggested that a low stand density management and a proper heavy thinning with low thinning frequency will be adequate.

提出了对人工林实行低密度管理（高强度、低频度间伐）的改进意见。

Design and application of the stand density form of Chinese white poplar

毛白杨林分密度表的编制及其应用

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43.79hm2。除色木槭之外，冠层林木的株数降低。

A study on the stand density control diagrams

林分密度管理图编制的研究

An Approach to Derive Stand Density Control Chart from the Integrated Stand Growth Model

由全林整体生长模型推导林分密度控制图的方法

Studies on the stand density control diagram for Cunninghamia lanceolata

编制杉木林分密度管理图研究报告

Studies on the stand density control diagram for black locust plantation in Liaoning Province

编制辽宁省刺槐人工林林分密度管理图

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。

preliminary studies on the stand density of magnolia officinalis and its inexorable law

厚朴密度作用规律的初步研究

studies on the stand density control diagram of cryptomeria fortunei plantations in eastern fujian

闽东柳杉人工林林分密度控制图的研究

the stand density of swcfswl was determined.

研究确定了辽西地区林分密度；

the stand density control diagram is prepared with the sample plot materials of cryptomeria fortunei plantations in eastern fujian areas, the precision meets the demands.

利用闽东地区的柳杉人工林标准地材料研制林分密度控制图，经检验精度满足要求。

based on the law of stand density effect, stand density control chart refers to a forest management chart formulated with the mathematical model of establishing the quantitative relationship between the stem density and each test stand density according to the theoretical principle of stand density effect.

林分密度控制图是根据林分密度效应法则理论，以林分密度效应规律为基础，建立株数密度与林分各测树因子之间的数量关系的数学模型来编制的一种森林经营图。

The results indicate that: ( 1) Bifurcation ratio is positively related with the tree size and it is negatively related with the stand density. For the suppressed trees in stand, the bifurcation ratio does more affect from the stand density.

研究结果表明：（1）分枝率与林木的大小呈正相关，与林分密度呈负相关，且林分中生长水平越差的林木的分枝率受到林分密度的影响越大。

The 5-year study indicates that the optimal thinning treatment for 20~ 30-year-old natural birch stands is to maintain a stand density of 1 100 stems · hm-2 and the pruning intensity should not exceed 1/ 2 tree height.

5a的研究结果表明，林龄20～30a的白桦天然林最适林分密度为1100株·hm-2，修枝强度不应超过1/2树高。

It has been shown that in many clonal perennials, when light is limiting, shoot natality decreases and shoot mortality increases with increasing stand density.

对许多多年生克隆植物来说，大量的研究表明：当光是限制因子时，随着立地密度的不断增加，克隆分株的出生率逐渐减小、死亡率逐渐增加。

Study on Effect of Stand Density on Tree Stem Form of Slash Pine

林分密度对湿地松林木干形影响的研究

a new index of stand density& the crown volume index

林分密度的新指标&冠积指数

The density of the stand for producing middle pole trees should be 3 460 tree per hectare, the spacing should be 1.7m × 1.7m. ( 2) high planting density and severe thinning regime is favorable to all kind of timber production;

中径材1.7m×1.7m，3460株/hm2。（2）采用较高的初植密度，并采用强度较大的间伐机制，对小径材和大、中径材的生产都是有利的；

and the effects of the site type, silviculture density and stand age on the above indexes are studied.

并分别立地类型、造林密度、林分年龄对这些指标的影响进行了研究。