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大豆是需要胆料較多的作物,据試驗分析,亩产500斤大豆約需氮素31.7斤,磷酸6.2斤,氧化鉀8.5斤,这說明大豆需要氮肥此禾谷粪作物約多1—2倍。已經接种根瘤菌的大豆,氮的来源約三分之二可以靠根瘤菌固定空气中的游离氮素,但在幼苗期根瘤菌尚未形成之前,应該追施充足的氮肥,以促进幼苗生長。特別是在比較瘠薄的土壤和未施基肥或施基肥較少的地里,尤宜增施氮肥。东北地
Soybean requires more bile crops, according to test analysis, about 500 kg of soybean required 31.7 kg of nitrogen, 6.2 kg of phosphoric acid, potassium oxide 8.5 kg, indicating that soybean needs nitrogen fertilizer this cereal crop about 1-2 Times Rhizobia-infused soybeans, which have been inoculated with rhizobia for about two-thirds, can rely on Rhizobium for immobilizing free nitrogen in the air, but enough nitrogen fertilizer should be chased to promote seedling growth before rhizobia are formed at the seedling stage. Especially in the more infertile soil and non-application of base fertilizer or less ground, especially the application of nitrogen fertilizer. Northeast