最优分割法划分6个主要造林树种的适生立地条件

CLASSIFICATION ON SUITABLE SITE OF SIX SILVICULTURAL TREE SPECIES BY USING THE OPTIMAL SEPARATED METHOD

本文采用最优分割法对东北林业大学帽儿山林场6个主要造林树种的合理立地边界及其在各地形条件下的生长状况进行了研究。根据对调查材料的定量分析,发现:①在山下平缓地段,相对高差小,土壤含水率高,存在逆温现象,气温最低;在山中缓坡内,土壤含水率适中,气温最高;山上陡坡,海拔高,土壤含水率低,气温随着海拔增高而下降。②红松、黄波罗和椴树在山的上、下两段生长较差,在山中部的立地条件下生长较好。山中部较好的立地条件对落叶松和水曲柳生长的影响不明显。胡桃楸适合于山中、上部的立地条件。

The paper researches suitable site and plantation growth for six silvicultural tree species in Maoershan Forest Farm of Northeast Forestry University by using the optimal separated method. Based on quantitative analyzing, we find:① In lower area of hill, relative differences of elevation are not much, and there is a higher moisture content in soil, phenomenon of temperature inversion, and lower temperature than any other area of the hill. In middle area of hill, moisture content in soil is suitable, and the air temperature is the highest. In upper of the hill, the moisture content in soil is lower than other area of the hill, and the air temperature decreases with the increasing of elevation. ② The growth of korean pine, amur corktree and amur linden in the lower and upper area of hill is worse than that in other area of the hill, but in middle area of hill the case is inverse. For dahurian larch and manchurian ash, the best site in middle area of hill doesn't appear significant effect on their growth. The most suitable growing site of manchurian walnut is middle and upper areas of hill.