基于养分回用-化肥替代的农业面源污染氮负荷削减策略及技术

发布时间：2018-04-06 05:18

本文选题：农业面源污染　切入点：氮负荷　出处：《农业环境科学学报》2017年07期

【摘要】：有效削减农业面源氮污染负荷是提升水环境质量的关键,也是当前关注的热点之一。氮排到水体是污染源,但其本身是农作物生长必需的营养元素。为此,提出了基于养分回用-替代化肥的农业面源污染氮负荷削减策略,利用农业生产系统对农业面源污染排放的氮进行消纳和回用,减少农田化肥氮投入并有效削减排入到水环境中的氮,达到农业生产与环境保护的双赢。重点介绍了面源污水中氮的农田直接回用、水生植物回收-有机肥还田替代、环境材料吸附净化-回收还田等几种技术途径及其应用,并指出了目前存在的不足及以后发展的方向。
[Abstract]:Reducing N pollution load of agricultural non-point source is the key to improve water environment quality, and it is also one of the hot spots.Nitrogen discharge into the water is a source of pollution, but it itself is a necessary nutrient for crop growth.Therefore, an agricultural non-point source pollution nitrogen load reduction strategy based on nutrient reuse and chemical fertilizer replacement was proposed. The agricultural production system was used to absorb and reuse the nitrogen emitted from agricultural non-point source pollution.Reducing the input of fertilizer nitrogen and effectively reducing the nitrogen discharged into the water environment to achieve a win-win situation between agricultural production and environmental protection.Several technical approaches and their applications, such as direct reuse of nitrogen in non-point source wastewater, water plant recovery and organic fertilizer replacement, adsorption, purification and recovery of environmental materials, and so on, are introduced in this paper.And pointed out the present deficiency and the future development direction.
【作者单位】：江苏省农业科学院农业资源与环境研究所;农业部长江下游平原农业环境重点实验室;
【基金】：公益性行业(农业)科研专项(201503106) 国家重点研发计划课题(2016YFD0801101) 江苏省自主创新项目(CX(15)1004)~~
【分类号】：X71

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