带状间伐促进赤松人工林天然更新的效果(Ⅱ)——更新种群的结构与生长  

The effect on natural regeneration of pinus densiflora plantation by cutting in strip(Ⅱ):the structure of natural regeneration population and its growth

作　　者：王成[1] 刘继生[1] 武红[1] 张美淑[1] 张鹏[1] 

机构地区：[1]延边大学农学院森林科学系,吉林龙井133400

出　　处：《延边大学农学学报》2000年第3期164-168,共5页Agricultural Science Journal of Yanbian University

基　　金：国家自然科学基金资助项目! (3976 0 0 6 5 )

摘　　要：通过在人工林内带状间伐开拓天然更新效应带 ,分析了赤松在不同试验地内的天然更新种群的结构与生长状况 .结果表明 :更新种群个体数量按年龄分布的曲线呈偏态分布 ,峰值偏左 ,在7年生苗木达到最高 .采伐后更新的赤松幼苗 ,地径和苗高生长在 4年生以后对环境条件的差异产生显著反应 ,7年生最为剧烈 ,不同样地中以采伐带内同龄幼苗生长分化最为严重 .带状采伐对伐前更新苗木的高生长也有很大促进作用 .更新苗木死亡的年龄主要集中在 7年生以下阶段 .因此 ,改善林地内的光照条件有利于提高更新幼苗的保存率 。Based on cutting in strip to increase natural regeneration in Pinus densiflora plantation, the structure and growth of regeneration population were analyzed. The results showed that the distribution curve of numbers of regeneration seedlings and young trees was partial, the peak value was partial to left, the number of 7a seedlings was maximum. The ground diameter and height of seedlings responded to environmental changes caused by cutting in strip after 4 years, and 7a seedlings were remarkable. The differentiation among seedlings with same age was seriously in cutting strip. The method of cutting in strip could accelerate the growth of seedlings regenerated before cutting. The ages of dead seedlings were concentrated on the phase below 7 years. So it was good for increasing reserved ratio and improving the growth of seedlings.

关 键 词：赤松人工林 天然更新 种群结构 带状间伐抚育 

分 类 号：S753[农业科学—森林经理学] S791.245[农业科学—林学]