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速度快、效益好去年九月到甘肃、宁夏一地四县调查,参观了宁夏西吉县用东方红—75、60拖拉机修筑反坡梯田,其经济效益十分显著。这是农牧渔业部农机化局下达的课题,从1983年到去年用30台拖拉机共修7万多亩。机械修反坡梯田的特点是施工速度快、效率高:小时作业量2.2—2.7亩,一天可修12—16亩,相当370—480个人工作业量,单机年工作量可达1000亩;机修作业费用低,1亩只用12元,人工修得60元,人修比机修费用高5倍多;机修工程可靠,靠土壤的吸水力和梯田的反坡角形成的蓄水能力可承受140毫米/24小时的大雨和90毫米/小时的特大暴雨;机修水土保持能力强,比原始荒坡可提高土壤含水量65.8％,能提高种草造林成活率、保苗率及植物生长量。工程措施与生物措施相结合机修反坡梯田的目的是为了拦
Fast and effective In last September to Gansu, Ningxia, a county survey, visited the Xixi County, Ningxia with Dongfanghong -75,60 tractors to build anti-slope terraces, the economic benefits are significant. This is the issue issued by the Bureau of Agricultural Mechanization of the Ministry of Agriculture, Animal Husbandry and Fisheries. From 1983 until last year, 30 tractors were used to construct more than 70,000 mu. Mechanical repair anti-slope terraces is characterized by construction speed, high efficiency: hourly workload of 2.2-2.7 acres, one day can be repaired 12-16 acres, equivalent to 370-480 man-hours, single annual workload of up to 1,000 acres; machine repair Low operating costs, only 12 yuan for a mu, 60 yuan for man-made repairs, and 5 times more man-made repairs than machine repairs. The mechanized construction works reliably with a water-holding capacity of about 140 mm / 24 hours of heavy rain and 90 mm / h of heavy rain; mechanized soil and water conservation ability than the original wasteland can increase the soil moisture 65.8%, can improve the survival rate of planting grass, seedling protection rate and plant growth. Engineering measures combined with biological measures Machine repair anti-slope terraces is to stop