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采用磷酸二铵进行施用部位效应研究,三年试验表明:大豆施底肥(磷酸二铵施于种下10cm)比施口肥(施于种下1cm)增产9.5—23.2％;施口肥比不施肥增产11.2％。
The application of diammonium phosphate site effect studies, three years of trials showed that: soy base fertilizer (DAP to plant 10cm) than the fertilizer (applied to the planting 1cm) yield 9.5-23.2%; Fertilizer yield 11.2%.