1.树种和苗木选择关本着“适地适树”的原则,根据经营目的,选择适宜当地气候条件、立地条件的树木品种。所选苗木应发育健壮,无病虫害,苗高和苗径应达到一定的要求。如毛白杨、杂交杨、法桐等苗木胸径应在3厘米以上,苗高在3.5米以上,苹果、梨、杏、桃等苗木树高在1米以上。尽量 1. Selection of tree species and seedlings In line with the principle of “suitable tree”, according to business purposes, select the appropriate local climatic conditions, site conditions of the tree species. Selected seedlings should develop robust, no pests, seedling height and seedling size should reach certain requirements. Such as poplar, hybrid poplar, Fatong and other seedlings should be more than 3 cm in diameter, height above 3.5 meters, apple, pear, apricot, peach and other seedlings height of more than 1 meter. Try hard