抚育措施对华北落叶松直径生长的影响

Effects of Tending Measures on Growth of Larix principis-rupprechtii

为研究抚育措施对华北落叶松直径生长的影响,选择华北落叶松纯林作为研究对象,对林木经过抚育措施后直径的变化进行测定,结果表明:第1次抚育措施后,林木的生长率呈现增加的趋势,在2007年达到了最高值,为11.06%,是2003年的1.53倍;进行第2次抚育措施后,其林木直径有一定的增长,其生长率的峰值在2015年出现,为9.89%,是采取抚育措施2011年的1.36倍;2次抚育措施后林分的生长率在一定时间内都有增长,说明抚育措施有利于林木的直径生长。

In order to study the effect of tending measures on the diameter growth of Larix principis-rupprechtii,pure forest of Larix principis-rupprechtii was selected as the research object,field investigation&measurement were conducted,and the diameter change of trees after tending measures was measured by analytic tree method.Result shows that the growth rate of trees increase after the first tending measures,reaching the highest value in 2007,which is 11.06%.After the second tending measures,the diameter of the trees has certain increase,and the peak growth rate is 9.89%in 2015,which is 1.36 times higher than that in 2011.After the two tending measures,the growth rate of the stands increase in a certain period of time,indicating that the growth environment of the trees has been improved and the growth space is relatively adequate after the two tending measures.It is beneficial to the diameter growth of trees.