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参照有关标准及背景值分析了福州菜区四大水系、渠沟灌溉水,菜园土、城镇农用垃圾的硝酸盐和重金属元素的污染特征,结果表明,四大水系水质晋安河为轻污染,白马河和闽江下游福州水段为微污染,八一水库为清洁,均可灌溉;渠沟灌溉水污染分布不均,东片的岳峰、鹤龄2个点Hg含量临界起标值,西片的长汀点Pb含量严重超标。菜园土除Cd外,其他重金属元素均有不同程度污染。城镇农用垃圾重金属含量虽符合国家标准,但Cr、Pb、Hg、As 4种元素含量高于一般菜园土,这是造成福州菜区菜园土和蔬菜重金属污染的重要原因。
According to the relevant standards and background values, the pollution characteristics of nitrate and heavy metal elements in the four major aquifers, drainage ditch irrigation water, vegetable garden soil and urban agricultural waste in Fuzhou district were analyzed. The results showed that the water quality of the four major rivers was light pollution, The lower Fuzhou section of the river and the Minjiang River is slightly polluted, the Bayi Reservoir is clean and can be irrigated. The irrigation water pollution in the ditches is unevenly distributed. The Hg content of Yuefeng and Crane Age in the eastern section is critical, Ting point Pb content seriously exceeded. Garden soil in addition to Cd, other heavy metals have different levels of pollution. Although the contents of heavy metals in urban agricultural rubbish meet the national standards, the contents of Cr, Pb, Hg and As in the vegetable garden soil are higher than those in common vegetable garden soil, which is the important reason for the heavy metal pollution in vegetable garden soil and vegetables in Fuzhou.