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大豆的营养和施肥问题比较复杂,国内外大豆研究工作者已经对大豆的养分吸收和施肥效果进行过不少的探索。吉林省农业科学院试验证明,大豆的干物质积累与氮的吸收动态大致上是同步的,而磷的吸收则在分枝至盛花期、鼓粒后期至成熟出现两个峰。J.J.Hanway和C.R.Weber的研究表明,大约有40％的N、45％的P_2O_5和40％的K_2O是在大豆籽粒开始形成以后吸收的,足见大豆生育后期养分供应至关重要。张澍泽、贺振昌先后报道了大豆氮、磷、钾营养及施肥效果的研究结果。
Soybean nutrition and fertilization problems are more complex, domestic and foreign soybean researchers have been on the absorption of nutrients and fertilization of soybeans have done a lot of exploration. Jilin Academy of Agricultural Sciences proved that soybean dry matter accumulation and nitrogen absorption dynamics are generally synchronous, and phosphorus absorption in the branch to full flowering, drumming late to mature two peaks. Studies by J. J. Hanway and C. R. Weber show that about 40% N, 45% P 2 O 5 and 40% K 2 O are absorbed after the start of soybean grain formation, which shows that nutrient supply in late soybean stage is crucial. Zhang Shuze, He Zhenchang has reported soybean nitrogen, phosphorus and potassium nutrition and fertilization results of the study.