通过对不同强度抚育间伐落叶松人工林进行研究,结果表明:间伐8年后,各间伐强度均能够促进落叶松胸径的增长,并且随着间伐强度的增加,胸径生长量的增长效果就愈加明显;对落叶松林分树高的生长会产生一定的影响,但这种影响在各间伐强度与对照间均不存在显著性差异,影响不大。各间伐强度能提高林分单株材积生长率,并且林分单株材积生长量随着间伐强度的增加呈递增趋势。由于间伐减少了林地内落叶松的数量,初期各处理区落叶松单位面积的蓄积量要明显低于对照。到间伐处理后的8年,极强间伐区落叶松单位面积的蓄积量295.3m³/hm²已超过了对照区的260.57m³/hm²,而其它处理区单位面积的蓄积量依旧低于对照区。

Experiments were conducted in different thinning intensity conditions of larch plantation.The results showed that the thinning intensities were able to promote the growth of larch DBH 8 years ofter the thinning operations,and with increasing of thinning intensity,diameter growth and volume growth effect is more obvious,which had certain influence on the tree height,but there was not significant differences.With increasing of the thinning intensity,the growth rate of stand tree volume and single tree volume growth could be improved.Because of the decrease of the tree numbers,the initial of the larch per unit area volume was significantly lower than the control after thinning.The volume of the strong thinning treatment area(295.3m³/hm²) exceeded the control area(260.57m³/hm²)8 years after the thinning treatment,and other processing unit area in the region of accumulation amount was still lower than the control area.