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通过水稻氮、磷、钾肥“3414”田间试验,建立基于肥料效应函数、土壤养分检测值和作物养分需要量的水稻施肥指标体系,综合运用并经田间试验验证,与当地土壤条件相适应。研究结果表明,水稻不同肥料增产率分别为氮肥59.5%、磷肥7.4%、钾肥4.9%;每1 kg养分生产稻谷分别为氮(N)13.6 kg、磷(P2O5)10.0 kg、钾(K2O)3.4 kg。潮土施氮、磷增产率高于水稻土,施钾增产率则为水稻土高于潮土。
The rice fertilization index system based on fertilizer effect function, soil nutrient value and crop nutrient requirement was established through field experiments of nitrogen, phosphorus and potassium fertilizers “3414” in rice, and comprehensively applied and verified by field experiments to adapt to the local soil conditions . The results showed that the yield of different fertilizers was 59.5% for nitrogen fertilizer, 7.4% for phosphate fertilizer and 4.9% for potash fertilizer respectively. The yield of rice for each kg of nutrients was 13.6 kg N, 10.0 kg P2O5 and 3.4 kg K2O, respectively kg. The yield of nitrogen and phosphorus in alluvial soil was higher than that of paddy soil, and the yield of potassium was higher in paddy soil than that in alluvial soil.