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农业面源污染已成为我国水体污染的主要来源。作为国家重要的商品粮基地和绿色食品生产基地,黑龙江垦区在获得粮食生产“十二”连增的同时,农业面源污染问题也不容忽视。农业生产与面源污染的脱钩分析结果表明,2001—2012年,黑龙江垦区粮食生产与施用化肥造成的面源污染之间多次出现扩张性耦合关系,粮食增产对化肥的依赖仍很大;粮食生产与源于农药的面源污染之间关系复杂,弱脱钩类型居多,也存在强脱钩与强耦合类型;畜牧业生产与其面源污染之间以弱脱钩类型居多。以宝泉岭分局为例、应用SD模型的模拟结果表明,到2020年,牲畜养殖造成的面源污染下降幅度最大,其次为化肥施用造成的面源污染,农药施用造成的面源污染下降空间最小。
Agricultural non-point source pollution has become the main source of water pollution in China. As an important national commodity grain base and green food production base, Heilongjiang reclamation area, while gaining grain production, has been continuously increased. At the same time, the issue of agricultural non-point source pollution should not be overlooked. The decoupling analysis of agricultural production and non-point source pollution showed that between 2001 and 2012, the non-point source pollution caused by grain production and application of chemical fertilizers in Heilongjiang reclamation and land reclamation tended to expand the coupling relationship, and grain production increased the dependence on chemical fertilizers. Grain There is a complex relationship between production and non-point source pollution originating from pesticides, with the majority of weak decoupling types, and strong decoupling and strong coupling types, and the weak decoupling type between livestock production and its non-point source pollution. Taking Baoquanling Branch as an example, the simulation results of SD model show that by 2020, the non-point source pollution caused by livestock breeding will fall the most, followed by the non-point source pollution caused by chemical fertilizer application and the decline of non-point source pollution caused by pesticide application Min.