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利用养分渗漏池研究了紫色土中氮肥品种、用量对氮素移动、淋失和水稻氮肥利用率的影响。结果表明:淹水期间淋失的氮素基本形态是NH+4 N,主要分布在土壤表层,并随时间而下移;NH+4 N 淋失量与降雨量呈显著正相关;氯化铵促进了NH+4 N 的淋失,但其氮肥利用率比尿素高8 个百分点,说明水稻上可酌施含氯化肥;增施氮肥增加了NH+4 N 的淋失量,减少了氮肥利用率,建议水稻施氮控制在150kg/hm2 。
Nutrient infiltration pool was used to study the effect of nitrogenous fertilizer on the movement of nitrogen, leaching loss and nitrogen use efficiency of rice in purple soil. The results showed that the basic forms of nitrogen leaching during flooding were NH + 4 N, which mainly distributed on the soil surface and decreased with time; NH + 4 N leaching loss was significantly and positively correlated with rainfall; NH 4 + -N promoted the leaching of NH 4 N, but its nitrogen use efficiency was 8% higher than that of urea, indicating that rice could be applied with chlorinated fertilizers; nitrogenous fertilizer increased the leaching amount of NH + 4 N, Reduce nitrogen use efficiency, it is recommended that rice nitrogen control at 150kg / hm2.