水稻深施肥的效益

采用田间试验方法,研究了水稻深施肥的效益,结果表明:当施氮量为15 kg/667 m2时,深施肥总氮径流损失比表层施肥降低25.1%,总磷径流损降低58.9%,水稻增产12.7%,氮肥利用率提高10.02%,利润增加133.60元/667 m2。在达到相同产量的情况下,比施氮量为18.68 kg/667 m2表层施肥节氮3.68 kg/667 m2,节磷1.84 kg/667 m2,节钾2.58 kg/667m2,节约肥料成本36.39元/667 m2。

Benefit of Deep Fertilization in Rice

The deep fertilization experiment result showed that when the nitrogen amount was 15 kg/667 m2,the runoff loss of nitrogen in deep fertilization was lower than that in surface fertilization by 25.1%,the runoff loss of total phosphorus was lower by 58.9% and the yield was increased by 12.7%,nitrogen utilization efficiency increased by 10.02% and benefit increased by 133.60 yuan/667 m2.When the yields were at the same level,the deep fertilization could save nitrogen by 3.68 kg/667 m2,save phosphorus by 1.84 k...