污水灌溉对土壤及蔬菜影响的调查

Survey of Effect Soil and Vegetable by Irrigating Sewage

对污水灌溉区的灌溉用水、土壤及蔬菜中有害物质含量进行调查。结果表明：被测定灌溉用水符合国家卫生标准，且尚未对土壤及蔬菜造成危害，但污水泥溉区的污水、土壤及蔬菜中铜、铅含量显著高于对照区（Ｐ＜０．０５），污水中“三氮”及阴离子合成洗涤剂显著高于清洁水（Ｐ＜０．０１），蔬菜中亚硝酸盐含量高于对照区蔬菜（Ｐ＜０．０１）

survey of the pollution of soil and vegetable in sewage irrigated fields is made and thecontents of some harmful substance;in the water ,soil and vegetable are determined.The re-sults show that the contents of lead and copper in the water,soil and vegetable in sewage irri-gated fields are dramatically higher than those in the control (P<0.05).The contents of thethree compounds containing nitrogen and the content of anionic detergent in the sewage aremuch greater than those in the control(P<0.01).The content of nitrite in the vegetable issignificantly higher than that in the control(P<0.01).