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针对黄淮地区夏大豆产量低而不稳的状况,通过苏、鲁、豫、皖四省三年24万亩丰产栽培开发性试验,提出“七五”期间提高黄淮地区大豆产量,应以提高单产为主,相应恢复一定的面积,在栽培技术措施方面,重点突出早、全、匀、壮四苗;初花期追施速效氮肥与深沟畦田化种植等三项重点措施。并相应提出最高叶面积指数在4.5—5.5,生物产量亩产472—525 kg的夏大豆,籽粒产量为亩产150 kg的生理指标。
According to the situation of low and unstable summer soybean production in Huanghuai region, the author put forward the suggestion of improving the yield of soybean in Huanghuai region during the “Seventh Five-year Plan” through the productive experiment of 240000 mu in three years in Jiangsu, Shandong, Henan and Anhui provinces, Improve the yield-based, the corresponding restoration of a certain area, in cultivation techniques, the focus of early, full, uniform and strong four seedlings; early flowering topdressing available nitrogen and deep furrow planting three key measures. Correspondingly, summer soybean with the highest leaf area index of 4.5-5.5 and bio-yield of 472-525 kg per mu was produced. The grain yield was the physiological index of 150 kg per mu.