贵阳市长坡岭林场次生林非空间结构研究

目的]了解贵阳市长坡岭林场次生林的结构。方法]采用设置标准样地的方法,共20个样地,将样地划分为6个群落,调查样地内所有乔木树种组成,测定胸径、树高等因子,并计算林木的密度、蓄积量、直径分布等。结果]场部工区和谷立工区主要的乔木树种共计23种,多样性不高,幼龄林和中龄林居多,由于小径级林木占多数,林分蓄积量不高,最多的群落3蓄积量也仅为8.084 m~3/hm~2,林木直径分布符合倒"J"型,即随着林木直径的增大,数量减少。结论]贵阳市长坡岭林场各群落林分结构尚不稳定,均属于增长型群落,制订合理的森林经营方案有利于林木蓄积量的上升。

Study on Non-spatial Structure of Secondary Forest in Changpoling Forest Farm of Guiyang

Objective]To understand the structure of the secondary forest in Changpoling forest farm of Guiyang.Method]All the tree species in the plot were surveyed by setting the standard plot,and 20 samples were involved,and the plot was divided into six communities.Diameter,tree height factor and so on were determined,the density,volume and diameter distribution of the trees were calculated.Result]The results showed that there were 23 species of tree species in the field area and the diversity was not high.The majority of young trees and middle age trees were the most.Community three units of hectares of accumulation were only 8.084 m3/hm2,forest diameter distribution in line with the inverted J-type,that was,with the increase in the diameter of trees,the number reduced.Conclusion]It can be seen that the forest stand structure was not stable,all belong to growth-oriented community,the development of rational forest management plan was conducive to the rise of forest reserves.