水田氮肥损失研究

Research on Nitrogen Loss of Paddy Fields

为了节约农业生产的成本,减少肥料的损失,提高肥料的利用率,明确水稻因控水管理造成的氮素流失数量。进行了水田氮肥损失研究,试验结果表明:2010年水田放水2次损失纯氮为37.8 kg/hm2,占投入总氮量的16%。因此,建议农业生产中尽可能地减少放水次数。

In order to save cost of agricultural production, reduce iertilizer loss,improve iertilizer efficiency, and detenmne the amount ot mtrogen loss caused by water management in rice,the research on nitrogen loss of paddy fields was carried on. The results showed that：through irrigation twice, the pure nitrogen loss reached 37.8 kg/hm^2,accounted for 16% of total nitrogen input in 2010. Therefore ,the irrigation frequency should be reduced in agricultural production.