灌水定额对波涌灌溉土壤中硝态氮浓度的影响  

Effect of irrigation quota on soil nitrate nitrogen concentration under surge irrigation

作　　者：尹娟[1,2] 费良军[3] 朱悦发 

机构地区：[1]宁夏大学土木与水利工程学院,银川750021 [2]宁夏大学节水灌溉与水资源调控工程技术研究中心,银川750021 [3]西安理工大学水资源研究所,西安710048 [4]宁夏唐徕渠管理处,银川750005

出　　处：《农业工程学报》2009年第5期30-34,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：宁夏大学科研基金资助项目(ZR200802);国家自然科学基金资助项目(50179030);陕西省重点实验室科研项目(08JZ51)

摘　　要：为深入研究波涌灌灌水定额对地下水硝态氮运移的影响,通过肥液(硝酸钾溶液)室内入渗试验,模拟研究了地下水位埋深150cm条件下,灌水定额对肥液间歇入渗地下水水质的影响规律。结果表明:不同灌水定额地下水中硝态氮浓度具有相似的变化规律,地下水位埋深越浅,地下水中硝态氮浓度的增加量越大,即浅层地下水易受硝态氮的污染;灌水结束时,进入地下水中的硝态氮量最大;在同一灌水定额条件下,地下水中硝态氮的浓度总体上随时间增加呈增大趋势;灌水定额越大,随下渗水分淋溶进入地下水中的硝态氮越多,对地下水造成的污染越严重。To study the effects of irrigation quota on nitrate nitrogen transport in the groundwater, based on indoor experiroents of fertile solution infiltration, the effects of irrigation quota on the influence of groundwater quality under the condition of 150 cm groundwater level depth were studied. The results showed that the nitrate nitrogen concentration in the underwater under different irrigation quota treatments had similar tendency, nitrate nitrogen concentration increased with decreasing of groundwater depth, that was to say shallow groundwater was vulnerable polluted by nitrate nitrogen; the maximum concentration of the nitrate nitrogen in the groundwater was appeared at the end of irrigation; the nitrate nitrogen concentration in groundwater increased with the time lengthening under the same irrigation quota; the nitrate nitrogen concentration increment in groundwater increased with increasing of irrigation quota. The more the irrigation quota is, the more seriously the nitrate nitrogen pollutes.

关 键 词：波涌灌 灌水定额 地下水 硝态氮分布 间歇入渗 

分 类 号：S274.1[农业科学—农业水土工程] S275.3[农业科学—农业工程]