密度对华北落叶松人工林树高、胸径和物种多样性的影响
张立民;刘彩虹;王立辉;罗晨
【期刊名称】《河北林果研究》 【年(卷),期】2015(000)001
【摘要】以河北省木兰围场国有林场管理局克勒沟林场华北落叶松人工林为研究对象，对标准地内保留密度为400株／hm2、600株／hm2、900株／hm2、1100株／hm2的华北落叶松在上坡位、中坡位、下坡位的树高和胸径以及物种多样性进行了调查分析，结果表明：在保留密度为600株／hm2时，林木生长最好，树高最大；保留密度小于600株／hm2时，树高随着密度的增大而增大，但大于600株／hm2时，树高会随着密度的增大而呈现降低的趋势；胸径会随着保留密度的增大而减小；对不同密度样地中的植物重要值及物种多样性指数进行了计算，林下草本层植物的数量、多样性指数在保留密度为600株／hm2时达到最大值，之后随着密度的增加均呈递减的趋势。%In this paper ,based on the research of L arix p rincipis‐rup p rechtii of Kelegou Forestry Farm of Mulanweichang Forestry Administration ,the tree height and DBH of L ar‐ix p rincipis‐rup p rechtii on uphill ,middlehill ,downhill slope positions ,chosen from suit‐able sample plots in the density of 400 ,600 ,900 ,and 1100 plants/hm 2 were investigated and analyzed .The result showed that in the density of 600 plants/hm 2 ,trees grew the best , with the highest tree height .When in less than 600 plants /hm 2 density ,the tree height in‐creased with the density increasing ,but decreased with the density increasing at more
密度对华北落叶松人工林树高、胸径和物种多样性的影响
