蔬菜缺磷和磷过剩的识别及防治

GANSU NONGYE(2009)

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Abstract
<正>磷肥是继氮素化肥后被普遍认识和接受的肥料,使用磷肥已被菜农纳入田间常规管理。但是,使用磷肥的时期和方法不当也会造成磷供应不足或过剩的现象,磷肥一般很少过剩,但在连
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