择伐强度对马尾松天然次生林生长的影响  

The effects of selective cutting intensive on growth of masson's pine natural secondary forest

作　　者：邓志华 

机构地区：[1]福建省三明市国有陈大林业采育场

出　　处：《森林工程》1999年第4期7-8,43,共3页Forest Engineering

摘　　要：本文采用固定试验地调查方法.马尾松天然次生林(9松1阔)按2种择伐强度对保留木生长和土壤水分物理性质的影响进行研究。结果表明:强度择伐(40％)与中等强度择伐(30％)比较。伐区木材生产直接单位成本降低32.8％;择伐5.58年后林分定期生长量指标(平均胸径,平均树高和单位面积蓄积量)的变化差异较小;土壤容重、孔隙状况和土壤通气度的变化差异也不明显。By investigating in regular test areas, the author studys on the effects of two kinds of selective cutting intensive on growth of remain trees and physical properties of soil and water in masson's pine natural secondary forests. The results show that unit cost of heavily cutting (40%) decreases 32. 8% compared with medium cutting (30%), that the indexes of periodical growth of stand (average diameter, average height and stocks per areas) vary less and soil volume, soil porosity and soil permeability are not clear than that of medium cutting.

关 键 词：择伐强度 马尾松 天然次生林 定期生长量 

分 类 号：S791.248[农业科学—林木遗传育种] S752.22[农业科学—林学]