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在桂东沙泥田水稻土上进行“3414”肥效试验研究,结果表明在一定范围内对水稻产量影响的排序是:氮肥>钾肥>磷肥;三者配施增产效果更显著;总体上要以“控氮、节磷、增钾”为施肥策略;氮、磷、钾肥的当季利用率和农学效率分别为29.5%、10.9%、24.1%和13.1 kg/kg、9.9 kg/kg、8.9 kg/kg;最佳施肥量为:N 134.0 kg/hm2,P2O552.4 kg/hm2,K2O 103.8 kg/hm2,N∶P2O5∶K2O=1∶0.39∶0.78,水稻产量可达6 227.2 kg/hm2,施肥利润达7 126.6元/hm2,效益较高。4年多点大田对比试验也表明其增产效果显著,可在生产中推广应用。
The “3414” fertilizer effect experiment on paddy soil in the muddy field of Guidong sand was carried out. The results showed that the order of influence on the yield of paddy rice was: nitrogen fertilizer> potassium fertilizer> phosphate fertilizer; the combination of the three was more significant; The seasonal and agronomic efficiency of nitrogen, phosphorus and potassium fertilizers were 29.5%, 10.9%, 24.1% and 13.1 kg / kg, 9.9 kg / kg, respectively. 8.9 kg / kg. The optimum fertilization rates were N 134.0 kg / hm2, P2O552.4 kg / hm2, K2O 103.8 kg / hm2 and N: P2O5:K2O = 1: 0.39: 0.78. hm2, fertilizer profit of 7 126.6 yuan / hm2, higher efficiency. Field more than 4 years of field trials also showed that the yield-increase effect is significant, can be applied in production.