江苏省武进市高产水稻田氮素渗漏损失研究

小区试验与农户调查研究结果表明 ,2 87kg/hm2施氮量宜作为武进市高产水稻的适宜施氮量 ,氮肥的过多施用不仅导致秸秆对氮素的奢侈吸收 ,也加重氮肥对渗漏水的污染。进一步降低水稻田施氮水平 ,又保持高产的水稻生产技术尚待开发。

Nitrogen Leaching from the High-Yielding Paddy Field in Wujin City

The results of years of plot experiments and farm household investigation show that the nitrogen application rate of 287 kg/hm\ 2 is appropriate for the high yielding paddy fields in Wujin City. Any excess application of N will not only lead to luxurious consumption of N by rice, but also increase N leaching into groundwater. A better rice production technology waits to be developed to further reduce the N application rate while keeping the high yield of rice.