摘要
全林整体生长模型对总蓄积的估计与对生长量的估计是相容的，可以用来计算林分生长率。基于全林整体模型和马什假设的名义年龄法是一种估算林分类型纯生长量的好方法，本文详细介绍了此法的计算步骤。大青山实验局两个树种的实验表明，此法给出生长率的无偏估计。对一个林分类型生长率的估计，其精度大致相当于１～４个固定样地的估计精度。因而特别适于对含有多种林分类型林区综合生长率的估计。
Integrated whole stand growth and yield model(
ISGM)is such a model thatits estimate of growth is compatible with the estimate of yield.Any
model like this can beused to predict the growth rate of the stand.The nominal age method
which is based on IS-GM and Marsh hypothesis is a good method to predict the net growth rate
of the stand.Thecalculation approach of this method is stated step by step in this paper. This
method has beenused to estimate the growth rates of two tree species in Daqingshan
Experimental Bureau andthe result is promising. This method can get unbiased estimate of
growth rates. Accuracy ofthis method for one type of stands is equivalent to the accuracy for
investigating 1～4 perma-nent plots. Therefore,this method is suitable for estimating general
growth rate of manytypes of stands in an area.
出处
《林业科学研究》
CSCD
北大核心
1995年第5期471-476,共6页
Forest Research
基金
1992年国家自然科学基金
关键词
纯生长量
林分
计算
net growth rate,model,stands,nominal
age Tang Shouzheng,Professor,Li Xifei( The Research Institute of Forest Resources
Information and Technique,CAF Beijing 100091).
