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甘肃省民乐县自1999年开始,在冷凉风沙灌区对保护性耕作进行了适应性试验研究,通过机械深松、秸秆覆盖、少免耕播种及病虫草害防控等示范推广,探索形成了适合县域种植特点的保护性耕作技术模式,取得了显著效果。1保护性耕作现况民乐县地处甘肃省河西走廊中部,海拔高度1 589~5 027 m,属山地和倾斜高平原地区,总面积3 678 km2,耕地面积7.67万hm2,人均耕地面积0.26hm2,由于受地势影响,形成了南部高寒、中部冷凉、北部干旱的特点,主要种植作物为小麦、大麦、油菜、马铃薯、大蒜和玉米等,属一年一熟制灌溉和旱作农业。10年多以来,民乐县先后承担了农业部、国家发改委和甘
Since 1999, Minle County, Gansu Province has carried out adaptive experiments on conservation tillage in the cold and windy and irrigated area. By means of mechanical subsoiling, straw mulching, sowing less no-till and prevention and control of diseases, pests and weeds, the project has been explored and formed The conservation tillage model suitable for the characteristics of county planting has achieved remarkable results. 1 Conservation Tillage Status Minle County is located in the middle of Hexi Corridor in Gansu Province at an altitude of 1589-5 027 m, belonging to mountainous and inclined highland areas with a total area of 3 678 km2, arable land area of 76700 hm2 and per capita arable land area of 0.26hm2 Due to the influence of the terrain, the characteristics of the southern cold, the central cold and the northern drought are formed. The main crops are wheat, barley, rape, potato, garlic and corn, which are irrigated and dry-farming for one year. More than 10 years, Minle County has assumed the Ministry of Agriculture, National Development and Reform Commission and Gan