根据“黄淮海夏大豆丰产栽培技术研究”课题的要求,1983年在总结了蒙城县有关乡村亩产150公斤栽培经验的基础上,本着“高产低成本”的原则,试图探索在淮北中低产地区夏大豆亩产150公斤的形态指标,为大豆高产提供科学依据。一、供试材料与研究方法 1984年在本所建立“亩产150公斤丰产田”,种植目前淮北面积最大的跃进5号和徐豆2号两个品种。麦收后土壤肥力:全氮0.084％、全磷0.153％、全钾2.53％,每100克土含碱解氮5.49毫克、速效磷0.9 According to the requirements of the project of “Huanghuaihai Summer Soybean High Yield Cultivation Technique”, in 1983, on the basis of summing up 150kg cultivation experience of mu per mu in Mengcheng County, in line with the principle of “high yield and low cost”, trying to explore in Huaibei Low-yielding areas of summer soybean yield of 150 kg of morphological indicators, provide a scientific basis for high yield of soybean. First, the test materials and research methods In 1984, the establishment of “150 acres of high-yielding fields per mu,” planted the largest in northern China, Yuejin 5 and Xu beans 2 varieties. After harvest wheat soil fertility: total nitrogen 0.084%, 0.153% of total phosphorus, 2.53% of total potassium, per 100 grams of soil alkali-nitrogen 5.49 mg, available phosphorus 0.9