长白落叶松人工林的适宜经营密度

Suitable Management Density of Larix olgensis Plantation

针对目前长白落叶松人工林间伐研究缺乏长期定位资料的状况,对东北东部林区同一立地条件下、同一林龄长白落叶松人工林采取不同密度经营指数(近似0.7、0.8、0.9、1.0、>1.0)进行了间伐,并长期记录其生长状况,研究其间伐的长期效果。结果表明:到达成熟期时,样地内保留木的平均胸径是随着经营密度指数的增大而减小,即间伐强度越大,林木的平均胸径越大。而不同的经营密度指数对单位面积蓄积量的影响没有明显差异。综合研究认为:落叶松人工林适宜采取的经营密度指数为0.7、0.8。

An experiment was conducted to study the thinning effect of Larix olgertsis plantations of the same age with different density indexes （ close to 0.7, 0.8, 0.9, 1.0, and more than 1.0 ） under the same site conditions by observing tree growth over a long period of time aiming at the lack of long-term localization data of thinning at present. Results show that the mean diameter at breast height of the reserved mature tree in the sampling plot decreases with density index increasing. Nevertheless, the effect of different density indexes on unit stock volume is indistinctive. Synthetic analysis proves that the most suitable density index for Larix gmelini plantation is 0.7 or 0.8.