从水资源分布特点和粮食基地建设谈河西干旱地区种草种树问题

种草种树,是改善干旱地区生态环境,促进经济发展的根本大计,具有战略意义。但在干旱地区不是随处都能种草种树,只有选择适宜地区才能成功。根据自然地理条件和水资源分布特点,河西有条件种草种树的地区可划分为:祁连山天然降水宜林宜草区,河西走廊灌溉宜林宣草地区和河西走廊浅埋地下水宜林宜草区。种树可保护水源,防护农田,制止风沙,使农业稳产;种草能保持水土,促进畜牧业发展,增加肥料,改良土壤,使农业高产。因此,草和树不仅能保证和促进河西商品粮基地的建设,而且也是其不可缺少的重要组成部分。商品性农业,保护性林业和商品性牧业三者协调,相互促进,不断发展,是河西农业建设的正确方向。

ON THE PLANTING OF TREES AND GRASSES IN HEXI ARID REGION WITH RESPECT TO ITS WATER RESOURCES DISTRIBUTION AND GRAIN-BASE CONSTRUCTION

The plantation of trees and graases is an essential project with great strategic significances in the improvement of eco-environment and the develop-ment of local economy in arid regions. But successes can only be gained withsuitable trees and grasses planted in suitable areas, not everywhere random.According to the physical geographic conditions and water resources distr-ibution in Hexi arid region, the author works out its favorable plantationareas as follows: The Qilianshan Mt. plantation area with natural rainfalls, theHexi Corridor plantation area with shallow ground water supports and the He-xi Corridor plantation area with artificial irrigations. The harmonious coordination and cooperation of commercial farming,stock raising and protective afforesting should be the prevailing orientationabided in the constructicn of Hexi's agriculture.