采伐作业产生的大林窗对阔叶林天然更新的影响  

Effects of Larger Gaps Caused by Harvesting on Natural Regeneration in Broad leaved Forest

作　　者：郝清玉[1] 周玉萍[2] 孙显林[3] 

机构地区：[1]吉林林学院交通工程系 [2]吉林林学院计算机系 [3]吉林林学院实验林场

出　　处：《吉林林学院学报》1998年第2期69-73,共5页

摘　　要：通过对不同采伐年限的大林窗进行调查分析，结果表明：阔叶林林窗尺寸小于０．０６ｈｍ２时，林窗内进界更新显著高于林冠下进界更新；林窗内阔叶乔木占有优势，未形成灌木杂草丛，并且林窗周围保留林木生长良好；林窗内进界更新数量与采伐年限成正比，而幼树更新与采伐年限成反比；不必担心出现林窗，人为保留老龄过熟木以减小林窗尺寸，会造成不必要的损失．By investing and analyzing larger gaps caused by harvesting after different years from harvesting,the results showed:When the size of gaps was less than 0.06hm 2,the regeneration of ingrowth and seedling in gaps was better than in crown and broadleaved trees dominanted the gaps.Residual trees around the gaps was healthy.The quantities of ingrowth regeneration were directly proportional to the years after cutting.On the contrary,that of seedling regeneration was inversely proportional to the years after cutting.Therefore,it was not necessary to remain overmature trees in order to decrease the size of gaps.

关 键 词：阔叶林 林窗 天然更新 树种多样性 

分 类 号：S718.54[农业科学—林学] S754.1