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土壤速效磷含量，对于施用磷肥的效果具有决定性作用。土壤速效磷含量在10～15ppm（磷酸氢钠法），绿肥、油菜需施磷，其他作物不需要施磷，速效磷含量＞15ppm，一般不需要施磷，新洋农场一般田块的速效磷含量＞10ppm，平均为16．8ppm，属于富磷土壤，但根据多年的种植经验，增
Soil available phosphorus content, for the effect of phosphate fertilizer is decisive. Available phosphorus content in soil 10 ~ 15ppm (sodium hydrogen phosphate method), green manure, rape need phosphorus, other crops do not need phosphorus, available phosphorus content> 15ppm, generally do not need phosphorus, Xin Yang farm general field available phosphorus Content> 10ppm, an average of 16.8ppm, belonging to phosphorus-rich soil, but based on years of planting experience, by