“永林公司”不同森林经营模式林分结构比较研究

对“永林公司”经营区9种森林经营模式林分结构比较研究,结果表明：应用Weibull分布、正态分布、对数正态分布、贝塔分布、伽玛分布等方法,对9种不同经营模式下的林分直径分布进行拟合,贝塔分布拟合效果较为理想,说明由于受到了人为的干扰破坏,林分结构发生了显著的变化.林分总体混交度均小于0.8,林分结构的均匀程度要优于整齐程度,在样地中封禁保护模式、集约经营模式的均匀度已经十分接近5,也就是接近一般均匀林的程度.

Study on stand structure in different forest management model in Fujian Yong’an Forestry(Group)Joint-stock Co.,Ltd

The stand structure in different forest management model in Fujian Yong＇an Forestry （Group）Joint-stock Co.,Ltd were studied. The results showed that： Using Weibull distribution ,normal distribution, log-normal distribution, Beta distribution, Gamma distribution for describing the diameter distribution of the stands within the 9 models, 13distribution showed a relatively ideal result. This indicated that the stand structure which was more in accordance with Weibull or normal distribution changed a lot, due to human disturbance. The total mixed degree of the stands was less than 0.8, and even degree was superior to its uniformity. The even degree of intensively-managed plots was very close to 5, namely, close to the degree of ordinary uniform forests.