尾巨桉DH32-28间伐效应分析

Analysis on the Effects of Thinning Eucalyptus urophylla×E.grandis DH32-28

以5年生尾巨桉DH32-28萌芽林林分为研究对象,设置5种间伐强度进行比较分析,结果表明:间伐2.5年后,林分胸径生长和单株材积生长达到极显著水平;林分蓄积生长差异显著;林分树高生长差异不显著。间伐强度增大有利于胸径和单株材积的生长,间伐强度越大,胸径和单株材积增长量越大。

A 5-year-old coppice plantation of Eucalyptus urophylla×E.grandis clone DH32-28 was subjected to five thinning intensities and subsequent growth differences were analysed.At 2.5 years after thinning,differences among thinning treatments for DBH growth and individual tree volume growth were highly significant;difference for stand volume growth were significant;but there were no significant differences among treatments for height growth.Increased intensity of thinning proved beneficial to DBH growth and individual tree volume,and DBH increment and individual tree volume increased as the intensity of thinning increased.