不同间伐强度对人工阔叶红松林生长的影响

文章针对不同间伐强度对人工阔叶红松林生长的影响进行了调查研究。结果表明:阔叶树胸径生长和蓄积增长率随间伐强度加大而增加,但对树高的影响较小;间伐强度的增大会明显促进红松胸径和树高的生长,但是首次抚育间伐会使当年的树高生长量显著降低,以后随林龄的增加树高生长量会逐渐恢复正常生长;中度间伐措施对阔叶树和红松的生长均比较有利,10a生的阔叶红松林实施上层抚育的适宜间伐强度为45%左右;中度间伐的林分由于资源水平适中(主要是光资源),因而有利于林下植被均匀度和多样性的提高。

Effects of Different Intermediate Cutting Intensities on Growth of man-made Broad-leaved and Korean pine mixed forests

In this paper,effects of different intermediate cutting intensities on growth of man-made broad-leaved and Korean pine mixed forests were studied.The results indicated that: average DBH and increasing rates of volume for broad-leaved trees increased with the increase of intermediate cutting intensity,but influenced a little on height;the growth of Pinus koraiensis's DBH and height were promoted obviously as the increase of intermediate cutting intensity,but declined just in the year of the first intermediate cutting,and then increased with the ages;Pinus koraiensis in open light when its ages reached at about 20 years would appear declining trend obviously;The intensity of mid-intermediate cutting was both favorable for the growth of broad-leaved trees and Pinus koraiensis,a upper story thinning intensity at about 45% was suitable for 10-year broadleaved and Korean pine mixed forest;The suitable resource level(light resource mainly)was favorable for the increase of the vegetation's Evenness index and diversity index under canopy in forests of mid-intermediate cutting intensity.