杨树混交林的研究

Studies on the Mixed Forest of Populus spp

杨树是北方沙壤土分布的重要树种,生长迅速,树干通直,成林率高。杨树的生态特性是喜水、喜肥、边缘效应明显,在光照充足,通气良好的条件下、生长旺盛。但病虫害较多,因此适宜营造混交林,特别宣与沙棘、刺槐混交,需要注意保持一定的混交比例。

Populus spp are important trees on the sandy loam soil in the northern part of China. They have straight trumks, higher storks and like aboundant water and fertilizer, especially grow faster at border row. In the conditions of abundant light and good circulation of air, they grow vigorously, but the diseases and pests occur seriously. Hence mixed forest are suitable, especially with Robinia pseudoacacia, Hippophae rhamnoides. Attention should be paid to keep a suitable mixing ratio that is very important.