再生水灌溉对典型土壤盐分和离子浓度的影响  被引量:29

Effect of irrigation with reclaimed water on soil salt and ion content in Beijing

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作  者:徐小元[1] 孙维红[2] 吴文勇[3] 刘洪禄[3] 李法虎[2] 窦超银[4] 

机构地区:[1]西安理工大学水利水电学院,西安710048 [2]中国农业大学水利与土木工程学院,北京100083 [3]北京市水利科学研究所,北京100048 [4]中国科学院地理科学与资源研究所,北京100101

出  处:《农业工程学报》2010年第5期34-39,共6页Transactions of the Chinese Society of Agricultural Engineering

基  金:国家“863”计划项目(2006AA100205);北京市“十一五”重大科技攻关课题(D0706007040291)

摘  要:为推动再生水安全灌溉,避免土壤盐渍化。该文研究了不同再生水灌溉年限对土壤盐分的影响。结果表明,不同再生水灌溉年限对各层土壤电导率、pH值无显著影响,而钠吸附比有所增加,但仍在适宜范围内。再生水灌溉后土壤中Na+、Mg2+、K+和Cl-含量总体呈现增加趋势,但在0~40cm层位增加不显著,40~80cm存在增加明显,土壤盐分在降水淋溶作用下具有向根系活动层以下迁移的趋势,华北地区气候条件下再生水灌溉引起耕层土壤盐分显著累积的风险较低。In order to promote safe irrigation with reclaimed water for preventing soil salinisation,field experiments were conducted to research the effects of different irrigation durations with reclaimed water on soil salt.The results showed that the irrigation durations of reclaimed water imposed little effect on electrical conductivities and pH value of soils in various depths.Soil sodium ratio(SAR)increased with it,but SAR is still in the scope of the feasible range.The contents of Na +,Mg 2+,K +,and Cl -in one meter soils column increased due to reclaimed water irrigation,which changed slightly in the soil depth from zero to forty centimeters and increased significantly in the soil depth from forty centimeters to eighty centimeters.The results showed that soil salt tended to penetrate outside of tillage layer by precipitation leaching.There is low risk in soil sanitation with reclaimed water irrigation.

关 键 词:灌溉 节水 再生水 土壤盐分 

分 类 号:S153[农业科学—土壤学]

 

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