郁闭度

因此必须先估测森林郁闭度，再建立包含郁闭度的蓄积量估测方程，才能实现以遥感和GIS为基础的蓄积量估测。

Therefore , it is essential to estimate forest canopy density first and then set up a stock volume estimation equation including canopy density to fulfill stock volume estimation based on remote sensing and GIS .

在分析LS估计存在缺陷的基础上，提出采用岭估计建立郁闭度估测方程。

Then , based on the analysis of possible limitation of LS estimation , the ridge estimation is put forward to establish the equation of canopy density estimation .

在模型中首次使用植被覆盖度fg这个遥感因子代替外野调查的郁闭度。

The vegetation covering ratio f_g is firstly used in the remote sensing biomass model .

利用LANDSATTM数据对森林郁闭度进行遥感分级估测

Estimation of Forest Closure Using Landsat TM Data

草本植物的Shannon-Wiener多样性指数与群落郁闭度显著负相关，与土壤pH显著正相关。

There was a significantly positive correlation between Shannon-Wiener species diversity index of herb and soil pH.4 .

运用该K值计算了杉木人工林的饱和密度，并由此推导出了不同立地条件下郁闭度分别为0.6,0.7,0.8和0.9时的杉木经营密度指标。

Using the K-value , the stand saturation density and the density index under different site condition were calculated when the canopy desity was 0.6 , 0.7 , 0.8 and 0.9 , respectively .

为建立监测区域以遥感和GIS为基础的森林郁闭度及蓄积定量估测方程，需在监测区域抽取一定数量有代表性的样地。

In order to establish the forest canopy density and stock volume estimation equation based on remote sensing and GIS in the monitoring area , it 's needed to sample certain amounts of representative sample plots .

蜜源林培育的合理郁闭度为0.6～0.8，适宜培育周期为15～20a。

Its reasonable canopy density is 0 6 ~ 0 8 , the management period is 15 ~ 20 a.

但不同密度的间作系统中PAR值不同，表现为明显的株行距效应和树冠开张、枝组结构、林间郁闭度等因素对树冠受光的影响。

PAR values were different in different density intercropping system , showing the obvious spacing effect , and showing the canopy opened , branch group structure , canopy density and other factors affected canopy to accept light .

次生林下栽植红松生长的最适生态条件是无灌，距大立木2m以远及林冠郁闭度0.5&0.6。

Optimal ecological conditions for the growth of planted Korean pine are sites with sparse bush cover , more than 2m far from big tree and a canopy density of 0 . 5-0 . 6 .

研究结果表明郁闭度对蓄积量估测起非常重要的作用，若要通过监测区域样地对应的遥感和GIS信息，建立以样地为单位的蓄积量估测方程，郁闭度是不可或缺的影响因子。

Result shows that canopy density palyes a very important role in stock volume estimation . Canopy density is an indispensable influencing factor in setting up stock volume estimation equations with sample plot as unit by means of corresponding remote sensing and GIS information of sample plots in monitoring area .

结果表明，林内郁闭度为0.75，平均胸径为6.67cm，平均高度为8.01mm，物种丰富度，Shannon-Wiener指数，Simpson指数由草层向灌木层、乔木层逐层递减。

The results show that plantation density is 0.75 , DBH is 6.67 cm , average height is 8.41 m , and species richness , Shannon-Wiener index , Simpson index generally reduce from herb layer to arbor layer .

CCA分析表明：环境因子与群落分布的相关性由大至小依次为岩石裸露度、坡度、海拔、郁闭度、坡向。

The results of Canonical Correspondence Analysis indicated that the correlations order of the community distribution with the environmental factors were bareness degree of rock , slope gradient , altitude , canopy cover and slope aspect in large to small .

退耕后期，退耕20a后，林分相对稳定期，林分郁闭度增大，土壤质量指数随之下降；

The later period is from 20 years after conversion initiation to current time . The period is the stable period characterized by the forest with dense canopy and a modest decline in soil quality index .

对于影像上树冠比较容易识别的低郁闭度林，提出了一种利用NDVI等值线结合树冠反射率最大点提取树冠的方法。

As to the forest part with low canopy density , which is easy to identify clearly in the images , a method of extracting the crown , with the combination of NDVI contour lines and the points whose reflectivity being the greatest in crowns , was proposed .

在郁闭度小于0.5林分中，平均中误差为0.502m，集中分布在0~0.7m范围内，频率为82.8%，中误差小于1m的频率为91.4%。

In the forest stand whose crown closure is under 0.5 , the average value of mean square error is 0.502m , distributed between 0 to 0.7m and the frequency is 82.8 % and the frequency whose mean square error is under 1m is 91.4 % .

大熊猫的活动区域尽量远离人类干扰，平均海拔达2819m，中坡位，郁闭度较高（57%）的原生林，距最近水源距离为139m。

The area of the giant panda 's acting is far from human disturbance , average elevation is 2819m , middle slope site , tree canopy is big ( 57 % ), original forest , the distance from the nearest water source is 139m .

基于不同郁闭度的青海云杉冠层截留特征研究

A Study of Interception of Picea Crassifolia Based on Different Canopy Closure

森林郁闭度对蓄积量估测的影响规律

Standard Effect of Forest Canopy Density on Stock Volume Estimation

森林郁闭度定量估测遥感比值波段的选择

Selection of Remote Sensing Ratio Wave Band for Canopy Density Quantitative Estimation

基于鱼眼镜头的林冠郁闭度简易测量方法

Simplified approach to measure canopy closure based on fish lenses

这些群落郁闭度高、树种丰富、结构完整、生长健康。

These communities canopy high species richness , structural integrity , grow healthy .

人工同龄纯林理论郁闭度测定计算的研究

Measurement and calculation of theoretical canopy density of pure artificial even aged stand

用岭估计及稳健估计测估测森林郁闭度及蓄积；

Forest canopy density and stock estimation by using ridge estimation and robust estimation .

确定监测区域建立森林郁闭度估测方程最优样地的研究

Determining the optimum sample plots for establishing canopy density estimating equation in monitoring area

滩地林分郁闭度与钉螺密度关系的研究

Study on Relations with Stand Crown Cover and Oncomelania Hupensis Density on Beach Land

能见度测定仪（气象仪器）授郁闭度航空象片测法

Visibility meter ( mete or meteorological instruments ) crown closure measurement in aerial photo

中性温度层结时森林郁闭度与林冠上风速廓线的关系

The Relationship Between Canopy Density of Forest and Wind Speed Profile Under Neutral Stratification

低郁闭度乔木行带式固沙林防风效果研究

Study on Wind Breaking Effects with Belt Scheme Arbor Forest at Low Canopy Density

油松枯萎病的发生与树种组成、林分密度和郁闭度的关系密切。

The disease was correlated with tree species composition , stand density and canopy density .