By using observation data over 50 years, the paper systematically analyzed the relations of different stand density with diameter, height, crown of trees and so on.
利用近50年的系统定位观测资料，分析红松果材兼用林不同林分密度与直径、树高、冠幅等主要测树因子的关系。
The evaluation of the stand density.
对林分密度的评价。
S function was the best model in the fitting between stand density and age.
密度与林龄的拟合以S函数为最优模型。
This not only tested the forest dynamics model but also verified the theory of stand density effect.
通过本文的研究既检验了林窗动态模型又印证了林分密度效应理论。
These models could be used to generate the standard tables for tree height, dbh, stand density and density control map.
模型可用于编制树高标准表、直径标准表、密度标准表以及密度控制图等。
It was larger in sunny slope than in shady slope under the similar density, and the index gap between different slope increased with the increase of stand density.
叶面积指数随林分密度的增加而增加，在相同密度条件下阳坡的叶面积指数大于阴坡，且密度愈大两者相差愈大。
The model of calculating new culm yield has also been established depending on the nonlinear relationship between new culm yield and bamboo stand density, culm age component.
并根据新竹产量与竹林密度和林分年龄组成的非线性相关关系，建立了新竹产量的预测模型。
Selective cutting intensity, stand density and felling tree volume per stem were considered as the major influencing factors by analyzing related researches at home and abroad.
影响油锯择伐作业中保留木损伤率的因素很多，经过分析可知采伐强度、林分密度和采伐木单株材积是影响保留木损伤率的主要因素。
Single age variable stock volume growth model had low coefficient of determination, but it was improved a lot by introducing site index and stand density index in reparameterization.
林龄单因变量的蓄积量生长模型决定系数低，引入地位指数和密度指数再次参数化的生长模型可显著提高模型拟合度。
At last, this paper will also apply the stand density model established with artificial neural network in asset assessment of forest resources and the estimation of growth and harvest.
最后，本文还将把人工神经网络建立的林分密度模型用于森林资源资产评估，进行生长收获的预估。
By means of the studies we also found that the stand density and site conditions had important effects on the dead and dying tree number, but the density was more important than the site conditions.
研究发现，林分密度和立地条件对枯死木株数均有重要作用，但密度比立地条件更重要。
Stand density index (SDI) was applied as a quantitative index to measure mean crowd degree between trees.
选择林分密度指数(SDI)作为反映林分中林木之间平均拥挤指标。
Stand density had a weak impact on height, crown height, crown width, diameter and length of upper branches;
密度对上层木的树高、冠长、冠幅、树冠上层枝直径和枝长等的影响比较小；
Stand density had a weak impact on height, crown height, crown width, diameter and length of upper branches;
密度对上层木的树高、冠长、冠幅、树冠上层枝直径和枝长等的影响比较小；
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