速效p
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available phosphorus p
有效磷磷
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In the acid paddy soil, sediment, the available phosphorus sources were Fe-P and Al-P. While Al-P was the source when the paddy soil was neutral or basic.
三角洲沉积酸性水稻土的有效磷源为铁磷和铝磷，中性、弱碱性水稻上为铝磷。
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