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。
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。
The ratios of stem, bark and branch biomass to total biomass of stand and individual tree are basically steady in different site index and planting density.
林分和单株的树干、树枝、树皮生物量组成比例均随立地指数、造林密度的变化无明显的差异。
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。
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。
应用推荐