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一试验目的内蒙河套灌区是一个历史悠久的灌溉农业区,地形平坦,黄河横贯本区,水、土、热量资源丰富,发展农业生产条件优越.目前,引黄灌溉渠系四通八达,引水调节自如,灌溉面积已达600万亩,今后可发展到1000万亩以上.但是,由于只灌不排,致使灌区土壤盐碱化日益加重,50年代耕地中盐碱地的面积只占10-15%,60年代上升为36%,70年代竟上升到60%以上,严重地影响了农业生产的发展,使“唯富一套”的粮仓,变成今日的低产区.
A test purpose Inner Mongolia Hetao irrigation area is a long history of irrigated agriculture, flat terrain, the Yellow River runs through the area, water, soil, abundant heat resources, the development of agricultural production conditions are superior.At present, the Yellow River irrigation system extending in all directions, diversion regulation, irrigation The area has reached 6 million mu and can be increased to more than 10 million mu in the future, but due to the imbalance of irrigation and drainage, the soil salinization in irrigated areas has been aggravated. The area of saline-alkali lands in cultivated land only accounted for 10-15% in the 1950s and increased in the 1960s To 36%. In the 1970s, it actually rose to more than 60%, seriously affecting the development of agricultural production and turning the granary into a low-yielding area today.