北京师范大学学报：自然科学版2012，Vol.48Issue(5)：572-576,5.
北京市再生水灌溉对土壤质量的影响研究
EFFECTS OF RECLAIMED WATER IRRIGATION UPON SOIL QUALITY IN BEIJING
摘要
Abstract
With increasing shortage of water resources,more attention has been paid on the utilization of reclaimed water.As reclaimed water contains rich nutrients such as N and P,it has been widely used in irrigation.However,several studies have demonstrated that irrigating with reclaimed water might have bad effects on soil quality,such as soil secondary salinization and heavy metal accumulation.In order to analyze the influence of reclaimed water irrigation upon soil quality,a field experiment in the typical reclaimed water irrigation area(Xinhe irrigation area,Tongzhou District) was carried out in this study.The treated soils for sampling and analyzing were irrigated with reclaimed water and well water.Contents of heavy metal(Cu、Ni、Pb、As、Cd and Zn) were measured by ICP-AES spectrometer,while soil salty ion(Ca2+、Mg2+、Na+ and K +) contents were tested by DX 600 ion chromatograph.Data showed that,soil irrigated with reclaimed water showed significant increase in salt ion contents than well irrigated soil,with an increasing order of w(Na+)w(K+)w(Mg2+)w(Ca2+).Further,Ca2+、Mg2+、Na+ accumulations at the depths of 40-80 cm and 140-180 cm were relatively critical.Vertical trends of sodium adsorption ratio(SAR) values of soil extraction were the same in districts irrigated with reclaimed water and well water.SAR values of reclaimed water irrigated soil were significantly higher than well irrigated soil,with an average of 5-6 times higher.But values were still in the suitable level for crops.Although heavy metals(Cu、As、Ni、Pb and Zn) slightly accumulated at the depth of 140-200 cm,values were still consistent with soil environmental standard grade of 1 and 2.Contents of soil heavy metal had no obvious differences between soils irrigated with reclaimed water and well water at the depth of 0-140 cm.关键词
再生水/灌溉/次生盐渍化/重金属Key words
reclaimed water/irrigation/secondary salinization/heavy metal分类
农业科学引用本文复制引用
高军,王会肖,刘海军,刘胜娅..北京市再生水灌溉对土壤质量的影响研究[J].北京师范大学学报：自然科学版,2012,48(5):572-576,5.基金项目
中央高校基本科研业务费专项资金资助项目 （）
