长江中下游地区水稻田溶解态氮流失量的估算—以江苏省靖江市柏木乡为例

Estimation on the loss amount of N in the paddy fields of the middle and lower reaches of Yangtse RiVer—A case study from Baimu Town，Jingjiang City，Jiangsu Province

摘要: 监测研究了长江中下游地区靖江市柏木乡典型水稻田施用N肥对地表水体的污染状况，并结合模型推求出该区降雨径流深度，由此估算水稻田溶解态N污染负荷量，稻田径流中N排放量为36．04kg／hm²，占N肥施用量的17．3％。

Abstract: The pollution status of applying N fertilizer in the typical paddy fields of the middle and lower reaches of Yangtse River tO the surface water is monitored．Combining the model，the depth of flowing path of precipitation in this area is obtained，and the dissolved N contamination amount is estimated for the paddy fields and the tota1 value is 36．04kg／hm²，it is 17．3％ of the N fertilizer amount used in the fields．