我国西北山区干旱少雨，如果植树后不采取保墒措施，造林成活率很低。笔者通过几年实践，摸索出压砂保墒植树法，简便易行，现介绍如下。 所谓压砂，就是把鹅卵以下的小石头，以５至１０厘米厚铺盖在新栽的小树周围，相当于给土壤覆盖一层风力吹不走、雨水冲不坏、太阳晒不烂， In the northwestern mountainous area of ​​our country, there is aridity and little rain. If we do not take measures to conserve soil after tree planting, the survival rate of afforestation is very low. The author through a few years of practice, to explore the pressure sand and soil moisture planting tree method, simple and easy, are introduced below. The so-called sand, that is, the small stones below the goosefoot to 5 to 10 cm thick cover around the newly planted trees, the equivalent of a layer of soil to cover the wind blowing, the rain is not bad, the sun is not bad,