西部地区主要以干旱大陆性气候为主，该地区面积大，有林地少，荒山荒地多，干旱少雨，风沙和水土流失危害十分严重。因此西部地区造林更为重要，但又存在相当大的因难，造林成活率往往较低。怎样才能提高北方干旱地区的造林成活率、是大家十分关心的问题，我们总结了托县地区 The western region is mainly dominated by arid continental climate. The area is large with less woodland and more barren hills and wilderness. It is very damaging for aridity, wind-blown sand and soil erosion. Therefore, the afforestation in the western region is more important, but there are still quite large difficulties, and the afforestation survival rate is often low. How we can improve the survival rate of afforestation in the northern arid areas is a matter of great concern to all. We have summarized the Tuoxian area