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陇东南部川塬区,海拔880—1300米,年日照时数2300—2500小时,年均气温8—11℃,≥0℃的积温3600—4200℃,年雨量500—600mm,年均无霜期160天左右。冬小麦、冬油菜是当地主要粮油作物,复种指数较高,历史上冬小麦、冬油菜收后以复种糜子为主。五十年代后,本区豌扁豆因产量低而不稳不再种植,麦秋轮作中豆科作物很少,地力消耗大,不利粮油产量进一步提高。为了探讨大豆插入轮作的可行性和经济效益,本地区农业科技人员近年来进行了复种大豆的试验研究和示范推广工作,收到了很好的效果。宁县农技
Longdong southeast Sichuan highland, 880-1300 meters above sea level, the annual sunshine hours 2300-2500 hours, the average annual temperature of 8-11 ℃, ≥ 0 ℃ accumulated temperature 3600-4200 ℃, annual rainfall 500-600mm, the average annual frost-free period of 160 days about. Winter wheat, winter rapeseed is the main grain and oil crops, crop multiple index higher history of winter wheat, winter rapeseed after the main species of mixed broomcorn. After the 1950s, because of the low yield and instability, the pea lentils in this area no longer planted. There were few crops of middle leguminous crops in the autumn of Renqiu. The geotechnical power consumption was so great that the yield of grain and oil was further impaired. In order to explore the feasibility and economic benefits of inserting soybeans, the agricultural scientists and technicians in this region have carried out experimental researches and demonstrations of multiple cropping soybean in recent years and received very good results. Ning County Agricultural Technology