西部地区虽然占有我国一半以上的国土,但地形以山地、高原为主,多戈壁、沙漠,可耕作和利用的面积比例较小;西部大部分地区年平均降水量在400毫米以下,一部分地区不足250毫米,青海、新疆的草原面积有一半干旱缺水;而且西部地区气候条件恶劣,属大陆性高原气候或大陆性干旱、半干? Although occupying more than half of China’s land in the western region, the terrain is dominated by mountains and plateaus. The proportion of areas with more deserts, arable land and utilizable land is smaller in the western region. In most parts of the western region, the annual average precipitation is less than 400 mm and is insufficient in some areas 250 mm, Qinghai, Xinjiang, half of the area of ​​grassland drought and water shortage; and the bad weather in the western region, is a continental plateau climate or continental drought, semi-dry?