森林抚育间伐对华北落叶松生长的影响

Effect of Forest Tending and Thinning on Growth of Larix principis-rupprechtii

为了研究森林抚育间伐对华北落叶松生长的影响,选择华北落叶松人工纯林作为研究对象,对经过抚育的华北落叶松的生长情况进行了调查。结果表明,华北落叶松林分抚育后的平均胸径和生长率均增加,其中生长率的增长随抚育间隔年限不同而变化,抚育后第1年生长率开始明显增长,第2~3年达到最大值,第4年开始下降,是先增长后下降,呈正态曲线的变化趋势。

In order to study the effect of forest tending and thinning on the growth of Larix principis-rupprechtii Mayr,the artificial pure forest of Larix principis-rupprechtii was selected as the research object,and the growth of the forest was investigated.The results showed that the average diameter at breast height and growth rate of Larix principis-rupprechtii increased after forest tending and thinning.The growth rate was different in different years.The growth rate began to increase significantly in the first year after forest tending and thinning,reached the maximum value in the second and third year,and began to decline in the fourth year,showing the trend of the normal curve.