塞罕坝地区华北落叶松人工林林分结构密度分异性研究

Study on the stand density differentiation of L.principis-rupprechtii plantation in Saihanba Mechanized Forest Center

为了培育大径材林木,对塞罕坝地区不同密度的华北落叶松人工林进行了调查研究。结果表明:华北落叶松密度不同,林木的径级组成、分化程度也不同。密度越大,径级数越多,林木分化指数越大。

Larix principis-rupprechtii plantation is the main body of forest management in Saihanba Mechanized Forest Center. Now there are 34,000 hm2 , accounting for more than half of the total forest area. Therefore, it＇s of importance to study the degree of differentia tion of different stand density of Larix principis-rupprechtii plantation, in order to provide scientific basis for management and control of Larix principis-rupprechtii plantation. This paper mainly studies four different densities of Larix principis-rupprechtii plantation. The statistical analysis reveals different diameter class and degree of differentiation with different stand density. The larger stand density is, the more amount of diameter elasse and the high- er differentiation index.