研究确定了辽西地区林分密度；
还建立了林分密度指数动态预估模型。
And also makes a structure of density of stocking index dynamic estimate model.
对林分密度的评价。
林分营养元素积累量随林分密度的增加而增加；
The standing nutrient accumulation in whole stand increased with the increase of density.
此时林分密度仍是影响林分生物量的主要因子；
Plantation density was still a major factor influencing biomass of the five-year-old plantation.
林分密度和受灾率及土层厚度和受害株数均呈显著的线性负相关；
The ratio of damaged trees was negatively correlated with stand density, soil depth and size class of diameter, and positively correlated with tree height.
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。
This not only tested the forest dynamics model but also verified the theory of stand density effect.
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 index (SDI) was applied as a quantitative index to measure mean crowd degree between trees.
土壤主要营养成分及土壤物理性状则有随林分密度降低而改善的趋势。
Conversely, the nutrition and soil physical property were enhanced with the decrease of density.
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。
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.
它们是树龄、林分密度、割脂、降雨量、温度、粘性土、石砾土、土层瘠薄、积水、病虫危害。
These were tree age, stand density, resin tapping, rainfall, temperature, clay soil, stone soil, soil depth, water logging, and other diseases and insect pests.
弦面和径面抗剪强度，林分密度相对低的林分人工林赤松低于林分密度相对高的林分人工林赤松；
The shearing strength in tangential face and shearing strength in radial face of P. densiflora wood from the stand with low density were lower than those from the stand with high density.
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。
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.
不同林分密度人工林纤维长宽比差异显著；不同海拔梯度人工林及不同林木等级间基本密度差异显著。
There were significant differences in ratios of fibre length to width of plantations, with different densities, as well as in basic densities of different elevation gradient and of tree classes.
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。
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.
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。
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.
应用正交试验设计方法，系统分析了不同林龄、不同立地条件和不同林分密度下人工杉木林木材纤维形态的变异规律。
By using orthogonal design, this paper systematically analysed the variation law of fiber morphology of Chinese fir wood from plantations with different ages, densities and growing sites.
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。
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.
因此被苔藓所覆盖的非常古老的树木的密度确实对森林的林分水平很重要。
So it's really the density of very large old trees that are draped in moss that is important at a forest stand level.
密度大的林分，生物量和净生产力也大。
The stand of big density has a larger quantity of living beings and net productivity.
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。
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.
结果表明，在郁闭林分内油松更新苗密度平均为5 375株。
The seedling density regenerated in closed stands is 5 375 ind.
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。
And the effects of the site type, silviculture density and stand age on the above indexes are studied.
结果表明，保留密度的变化对树高生长影响不大，对林分胸径和单株材积的生长影响显著。
The results showed that the effect of the reserve density on the diameter and volume of individual tree were obvious.
随着密度的增加，林分达到数量成熟期的年限变短，若以数量成熟期为采伐年限，则单位面积年均材积产量仍以高密度林分为最大。
Higher density stands reach quatitive maturity earlier than lower density stands, the annual stem volume produced by unit land area of higher density stand is larger than that of lower density stands.
在本研究中，吾人将森林分为高、中、低密度三种等级。
In the research, forest density is classified into three levels: high, medium and low.
相同立地等级的林分随着造林密度的增加，林分的市场收入价格和成本价格逐渐增大。
With increase of planting density, market income price and cost price of stand which have same site grade gradually enhance.
但蓄积量大幅下降，林分的龄组、密度结构严重失调，林分生长量偏低。
But stand volume descents to a great extent, age class and stand density structure are maladjusted badly, and the number of stand growth is low.
沙丘部位对林分不整齐性的影响作用要大于密度。
The location at sand dune was also an important factor, and its effect was more obvious than that of density.
另外，对杉木不同初植密度下林分断面积、蓄积和生物量的生长过程进行了分析和模型拟合。
In addition, the paper analyzed and simulated growth process of stand basal area, volume and biomass under different initial planting density for Cunninghamia lanceolate, plantation.
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