1994～ 1 996年开展了 5种不同模式水稻田生态系统主要养分 N、P、K在整个生育期间随渗漏水淋失规律的研究。结果表明 :不同模式的水稻田生态系统中 ,淋失的 N素养分主要以 NO- 3- N为主 ,NH+ 4 - N淋失仅占很少部分 ,并且随着深度的增加 ,NO- 3- N的淋失逐渐增大 ,而NH+ 4 - N的淋失则逐渐减小。淋失的 P、K养分量很小 ,且随深度的变化其变化量亦不大 From 1994 to 1996, the law of leaching loss of main nutrients N, P and K in paddy field ecosystem during the whole growth period was studied in five different modes. The results showed that NO - 3 - N leaching was the main leaching loss in paddy field ecosystem, NH + 4 - N leaching accounted for only a few of them, and with the increase of depth, NO 3 - N leaching gradually increased, while NH + 4 - N leaching is gradually reduced. Lin leaching of P, K nutrient content is small, and changes with the depth of its change is not large