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随着农村经济的发展,化肥施用量逐渐增多,污染也越来越严重。以四川省西充县西充河流域为例,采用输出系数法,对化肥引起的面源污染进行研究,并提出相应的防治措施和建议。结果表明,西充县西充河流域部分区域化肥污染严重,施肥比例不协调,主要的污染物为总氮,其中常林乡化肥污染贡献度最大,对此应采取一系列的工程和非工程措施来减轻当前的化肥污染。
With the development of rural economy, the amount of chemical fertilizer applied gradually increased, and the pollution became more and more serious. Taking Xichonghe Watershed in Xichong County, Sichuan Province as an example, the output coefficient method was used to study the non-point source pollution caused by chemical fertilizers and put forward the corresponding prevention measures and suggestions. The results showed that part of the Xichu River basin in Xichong County had serious pollution of chemical fertilizers, uncoordinated fertilization rates, and the main pollutants were total nitrogen. Among them, the contribution of chemical fertilizers in Changlin Township was the largest, and a series of engineering and non-engineering Measures to reduce the current pollution of fertilizers.