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根据1980年综合考察结果,黄土高原水土流失重点县——固原县(包括已分出的彭阳县),有天然草场25.5万公顷,占全县总面积的37.5%,其中干草原草场占74.9%。由于长期滥垦滥牧,草场面积日益缩小,退化严重,草质低劣,毒草增多。大面积荒山的物质再生产能力很低,全县平均每公顷产鲜草1.7吨。草地生产潜力未得发挥,水土流失危害难以制止,占土地总面积85.6%的水土流失面积年土壤流失总量达0.26亿吨。改造低产天然草场为高产人工草地,提高生产力,保持水土,解决“三料”问题,是农业现代化任务重要组成部分。我们选择有代表性干草原样地进行草地建设,对全县大面积草场改良有指导意义。
According to the results of the comprehensive survey in 1980, Guyuan county (including the separated Pengyang County), a key county in the soil and water loss in the Loess Plateau, has 255,000 hectares of natural grassland, accounting for 37.5% of the total area of the county, of which the steppe grassland accounts for 74.9% %. Due to long-term indiscriminate overgrazing, pasture area is shrinking day by day, serious degradation, poor grass quality and increased poisonous weeds. Large areas of barren hills material reproduction capacity is very low, the county average per hectare produce fresh grass 1.7 tons. Grassland production potential has not been played, soil erosion damage is difficult to stop, accounting for 85.6% of the total land area of soil erosion area annual total soil loss of 26000000 tons. It is an important part of the task of agricultural modernization to transform the low-yield natural grassland into high-yield artificial grassland, increase productivity, maintain soil and water and solve the problem of “three materials”. We choose to have a typical hay grassland construction, the county’s large-scale grassland improvement has guiding significance.