通过在江汉平原腹地江北农场5个分场布置中稻的“3414”肥料效应试验,研究了氮、磷、钾肥对中稻产量和经济效应的影响.结果表明,施肥对中稻的增产效果明显,中稻施用氮肥的效果最好,磷肥次之,钾肥最小.稻谷最高增产695.1～2 414.7 kg·hm-2,相应增产率为8.6％～37.8％,纯增收1 011.2～3563.5元·hm-2.通过配置三元二次和一元二次肥效模型,结合田间试验实际情况,确定中稻的最佳施肥量为纯N180～200 kg· hm-2,P2O5 55～60 kg· hm-2,K2O50～60 kg· hm-2.%A "3414" fertilizer experiment was carried out in Jiangbei farm of five fields to determine the yield and economic effect of nitrogen, phosphorus and potassium fertilization on mid-season rice. The result showed that the effect of fertilization on mid-season rice yield increase is obvious: the effect of N fertilization on mid-season rice yield and economic benefit was largest, the next was P, and K fertilization was the smallest. The highest in yield of N, P and K were 695. 1 - 2 414. 7 kg · hm~2 , and which were 8. 6% -37. 8% higher than control. The net income of N, P and K were 1 Oil. 2 - 3 563. 5 Yuan · hm~2 , respectively. According to fertilizer effect, N, P2 O5 and K2O application rate to get the highest profit were 180 - 200 kg · hm-2 , P2 O5 55 - 60 kg · hm"2 , and K2 O 50 - 60 kg · hm-2 , respectively.
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