再生水灌溉环境生态效应研究进展

再生水灌溉是解决水资源短缺的有效途径之一。本文从再生水灌溉对地下水及地表水的水质、土壤质量和作物生长几个方面综述了近年来国内外对再生水灌溉对环境生态的影响所取得的研究成果,并针对我国再生水灌溉存在的问题,对再生水灌溉今后的发展进行了展望,指出未来研究的重要方向是:研究再生水处理新工艺及再生水灌溉新技术和新制度;制定再生水灌溉标准;再生水灌溉条件下磷、氮、有机物、重金属在土壤植被系统中的迁移转化规律;再生水安全高效灌溉技术、再生水灌溉和施肥耦合增产效应及灌溉后农田适宜的灌溉施肥量;建立再生水灌溉对环境影响和健康风险评价指标与评价方法。

Research progress on environmental and ecological effects of reclaimed water irrigation

Reclaimed water irrigation is one of the effective measures to deal with the scarcity of water resources.The research results of irrigation technologies with reclaimed water on environmental and ecological effects at home and abroad in recent years were summarized and the prospect of reclaimed water irrigation and the key points of future research were analyzed in accordance with the problems in our country.The future investigation should focus on the below aspects,including new technology and system for reclaimed water irrigation,new treatment technique for reclaimed water,making reclaimed water irrigation standards,the transfer and migration rule of phosphorus,nitrogen,organism and heavy metal,safe and high efficiency irrigation technologies,coupled increasing production effects with relained water irrigation and fertilizer and suitable fertilizing amount after irrigating,establishing the indexes and methods for environment impact and healthy risk evaluation.