The structure characters of broad-leaved woodland I.The relationship between stand age and stand density;
阔叶林林分结构特征 I.林分年龄与林分密度的关系
Effects of Pinus massoniana plantation stand density on understory vegetation and soil properties
马尾松人工林林分密度对林下植被及土壤性质的影响
Relations of stand density and the biomass of the artificial young Larix principis-rupprechtii forest
华北落叶松人工幼林林分密度与生物量的关系
In this paper the relationships between forest density and index of decline disease, and soil moisture content were studied and determined in Pinus taeda plantations in Anhui province.
对安徽省火炬松林分密度与衰退病的感病指数和土壤含水量的关系分别进行了研究 ,结果表明 :林分密度与衰退病和土壤含水量关系十分密切 ,在一定的树龄和密度范围内 ,林分密度与衰退病的病情指数呈正相关 ;与土壤含水量 (在干旱条件下 )呈负相关。
Through real surveying material, the paper determines the influence of forest density and felling intensity to stander damage and finds out changing regulation.
本文通过兴隆林业局的实测资料,确定出林分密度和采伐强度对保留木损伤的影响,找出其变化规律,认为:①随着林分密度的增加,保留木损伤率也增加。
Based on the model compatibility, the whole stand model for papermaking and raw material stand of masson pine has been made by establishing the dynamic predicting model of stand density index with Korf equation in accordance with the auxiliary variables of age, site index and original planting density.
以年龄、地位指数、初植密度为辅助变量 ,利用 Korf方程建立林分密度指数动态预估模型 ,从模型相容性思想出发 ,研制了马尾松造纸原料林全林分模型 ,模型经检验精度高、误差小 ,且能反映林分测树因子动态变化及因子之间关系的基本规律 ;最后给出了模拟已知初始密度林分自然生长过程的实
This paper formulates the definition and functions of the system yield table in comparison with the conventional yield table and forest stand density control diagram by overview.
林分密度管理图是根据林分密度效果编制的可预测林分平均收获的图。
The correlation between the output of different dimension stock and stand density was significant.
不同规格材的出材量高低与林分密度相关密切。
Studies on the Relation between Density and Undergrowth Diversity of Pinus Tabulaeformis and Populus Davidana Forests in DA WO PU;
大窝铺油松林山杨林林分密度与林下植物多样性研究
Influence of stock density on crown structure of Prunus davidiana
林分密度对山桃树冠结构的影响研究
The Relationship between Growth and Stand Density of the Artificial Forest of Pinus Tabulaeformis in Daqing Mountains;
大青山区油松人工林生长与林分密度关系研究
Stand Density of Planted Scenic Forest Pinus Tabulaeformis and Platycladus Orientalis in Beijing Mountain Area
北京山区油松侧柏人工风景林林分密度确定
Physico-mechanical Properties of Pinus densiflora Plantations of Different Stand Densities
不同林分密度人工林赤松物理力学性质的比较
Study on Wind-resistance of Young Eucalypt Plantation at Different Stand Density
不同林分密度桉树幼林抗风性比较研究
Relations of stand density and the biomass of the artificial young Larix principis-rupprechtii forest
华北落叶松人工幼林林分密度与生物量的关系
Effects of Pinus massoniana plantation stand density on understory vegetation and soil properties
马尾松人工林林分密度对林下植被及土壤性质的影响
ESTABLISHMENNT AND APPLICATION OF DENSITY CONTROL DIAGRAM OF JAPANESE LARCH STAND
日本落叶松林分密度控制图的编制及应用
A STUDY ON METHOD OF DRAWING FOREST DENSITY CHART OF PINUS MASSONIANA IN HUBEI PROVINCE
湖北省马尾松人工林林分密度管理图编制方法探讨
Study on the Effects of Stand Density and Site Condition on Larix Principis-rupprechtii Plantation
林分密度及立地条件对华北落叶松人工林影响的研究
Study on Effects on Tree Growth and Undergrowth Herb Diversity in Larix Principis-rupprechtii Plantation;
林分密度对华北落叶松人工林林木生长及林下植物多样性影响的研究
The Research on Growing Process and Stand Desity of Larch and Chinese Spruce Multi-layer Stand in QingShan Forest Farm of SouthEast China;
黑龙江省青山林场落叶松云杉人工复层林生长过程与林分密度研究
Growth Characteristics of Eucalyptus urophylla×E.grandis Stands with Different Planting Spacing
尾巨桉不同造林密度林分生长特性研究
Analysis of Density Effect of Armeniaca sibirica Forests in Western Region of Liaoning Province
辽西地区山杏林分栽植密度效应的分析
the density of a forest, the fog, etc
森林的密度、 雾的浓度.
Study on the Characteristics of Fine Root Distribution and Growth of E. Grandis·herbs Compound Mode under Different Density;
不同密度巨桉林·草模式细根分布及其生长特性