—、盐碱地区的自然概况据一九五九年土壤普查资料统计,本省耕地和荒地的盐碱地共有1,410多万市亩,其中耕地盐碱地有210余万市亩,约占耕地面积的3%,在河西走廊地区的约占150余万市亩,约为河西灌溉面积700余万亩的21.4%,其余分布在黄河干支流地区;荒地盐碱地约1,190多万市亩,全部在河西. -, Nature of the Saline-Alkaline Region According to the 1959 Census of Lands, there are more than 14.1 million mu of saline-alkali land in the arable land and waste land in the province, of which there are more than 2.1 million mu of arable land, accounting for about 3% of the arable land, Hexi Corridor area accounts for about 150 million mu, about 21.4% of Hexi Irrigation area of ​​more than 700 acres, and the rest in the Yellow River tributaries; about 1,190 million mu of wasteland saline land, all in Hexi.