我国大豆主产区,原在黄淮和东北,长江以南各省大豆仅有零星种植,且产量不高,不能满足人民生活需要。再者由于耕作改制,江南地区长期栽培双季稻后,土壤出现亚耕层青泥化,结构变差,肥料有效利用率降低,严重影响产量的进一步提高,出现农本提高,经济效益下降的现象。经调查当地耕作习惯,开展了麦一豆一稻轮作制的研究。 1975—1979年由于当时采用的春大豆品种为太兴黑豆,且耕作粗放,大豆亩产变幅在85.5—200斤。1979年选育出新品种“78—17”,结合新的栽培措施,在各点试验中,大豆 The main soybean producing areas in China, originally in the Huanghuai and Northeast China, only sporadic planting of soybean in the provinces south of the Yangtze River, and the yield is not high, can not meet the needs of people’s lives. Moreover, due to the tillage system, the long-term cultivation of double cropping rice in the southern part of the Yangtze River resulted in the formation of sub-tillable silt in the soil, which led to the deterioration of the structure and the decrease of the effective utilization rate of fertilizers, which seriously affected the further increase of output. phenomenon. After investigating the local farming practices, we carried out the research on the cropping system of wheat and beans. 1975-1979 due to the spring soybean varieties used to Tai Hing black beans, and extensive farming, soybean amplitude of 85.5-200 kg per mu. In 1979 bred new variety “78-17”, combined with the new cultivation measures, at each point in the test, soybean