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稻田种植秋大豆氮磷及氮磷钾配施比单施氮产量效益高。在磷钾用量一致的基础上每公顷配施氮 75kg的产量和纯收入最高 ,磷肥是每公顷施 N 75kg配施 P2 O536kg的产量和收益高 ,钾肥不同比例用量的产量和效益差异不明显。稻田种秋大豆氮磷钾肥用量以每公顷施 N75kg、P2 O53 6kg和 K2 O37.5kg为最佳经济施用量
Nitrogen and phosphorus in autumn soils planted with rice and application of N, P and K were higher than those in single N application. The yield and net income per hectare was the highest on the basis of the same amount of phosphorus and potassium fertilizer. The yield and net income of high-phosphorus fertilizer application was 75kg per hectare and P2 was 536kg. The yield and benefit of different proportion of potassium fertilizer were not obvious. The amount of nitrogen, phosphorus, and potassium fertilizer applied to paddy soils in autumn was N75kg / ha, P2 O53 6kg and K2 O37.5kg, respectively