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生产实践和研究表明,大豆高产纪录的重演性很小。董钻等对大豆栽培措施的优化进行了研究。以辽豆3号为例,设计了密度、硫酸铵、三料磷肥、硫酸钾四个因子五个水平,采用四元二次通用旋转组合方法。1987年在海城试验,辽豆3号亩产175公斤以上的栽培措施组合是:每亩密度12548～13885株;硫铵用量9.86～12.31公斤;三料磷肥
Production practice and research show that the reproductive record of high-yield soybean is small. Dong drilling and other soybean cultivation measures to optimize the study. Taking Liao Dou No.3 as an example, five levels of density, ammonium sulphate, three-pot phosphate fertilizer and potassium sulphate were designed. The quaternary quadratic common rotation combination method was used. 1987 test in Haicheng, Liao Bean 3 per mu yield of more than 175 kg combination of cultivation measures are: density of 12548 ~ 13885 acres per acre; amount of ammonium sulfate 9.86 ~ 12.31 kg; three fertilizer