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1、前言近年,西欧各国地下水硝态氮浓度的急剧上升,正在成为重大的社会问题。从OECD(经济合作和发展组织)的实际调查得知,农业正在成为地下水的硝酸污染源之一,致使农村地区也在采取各种削减污染负荷的对策。本文以水质污染状况的国际比较为基础,通过实例介绍水田和湿地在水质保护中的重要作用;为了提高作物对肥料的利用效率,尽力防止从农田排出污染物质,综合论
1, Foreword In recent years, the drastic rise of nitrate nitrogen concentration in groundwater in Western European countries is becoming a major social issue. According to the actual OECD (Organization for Economic Cooperation and Development) survey, agriculture is becoming one of the sources of nitric acid in groundwater, causing various measures to reduce pollution load in rural areas. Based on an international comparison of water pollution status, this paper introduces the important role of paddy fields and wetlands in water quality protection. In order to improve the utilization efficiency of crops to fertilizers and prevent as much as possible the discharge of pollutants from farmland,