微咸水与再生水混灌对土壤离子交换性能的影响  

Effect of Mixed Irrigation of Brackish Water and Reclaimed Water on Soil Ion Exchange Performance

作　　者：胡俊芳 曾智 刘春成[3] HU Junfang;ZENG Zhi;LIU Chuncheng(Jiangxi Provincial Ganfu Plain Hydraulic Engineering Administration,Nanchang 330096,China;China Railway Water Conservancy&Hydropower Planning and Design Group Co.,Ltd.,Nanchang 330029,China;Institute of Farmland Irrigation,Chinese Academy of Agricultural Sciences,Xinxiang 453002,China)

机构地区：[1]江西省赣抚平原水利工程管理局,江西南昌330096 [2]中铁水利水电规划设计集团有限公司,江西南昌330029 [3]中国农业科学院农田灌溉研究所,河南新乡453002

出　　处：《人民珠江》2024年第12期105-113,共9页Pearl River

基　　金：河南省科技攻关项目(232102110014);河南省自然科学基金面上项目(242300420061);中央级公益性科研院所基本科研业务费专项(IFI2023-25)。

摘　　要：淡水资源的匮乏一定程度上限制了微咸水与淡水组合模式的利用。为了探寻微咸水安全利用新模式,通过盆栽试验,研究了微咸水与再生水混灌对土壤交换性离子、盐基总量、阳离子交换量和土壤碱化度等的影响。结果表明,与纯微咸水灌溉相比,微咸水与再生水1∶1混灌土壤交换性钠离子、钙离子含量、交换性盐基总量、阳离子交换量分别降低了59.43%、9.47%、24.88%、20.82%,土壤交换性镁、钾离子含量分别提高了25.94%、57.89%。随着混合液中再生水比重的升高,土壤交换性钠离子含量、碱化度逐渐显著降低,土壤交换性镁离子含量呈显著升高趋势,土壤交换性盐基总量和盐基饱和度均呈逐渐降低趋势。土壤交换性钠离子含量、盐基总量、碱化度(Exchangeable Sodium Percentage,ESP)与土壤水分、盐分、滴水穿透时间呈极显著正相关关系(P<0.01)。土壤交换性盐基饱和度与收获后土壤水分、盐分呈极显著正相关关系(P<0.01)。pH和土壤总氮含量均与土壤交换性钠离子含量、盐基总量、ESP呈极显著负相关关系(P<0.01),与土壤交换性盐基饱和度呈显著负相关关系(P<0.05)。研究结果可为微咸水安全利用新模式提供一定理论参考。The scarcity of fresh water resources limits the utilization of the combination mode of brackish water and fresh water to some extent.To explore new modes of the safe utilization of brackish water,a pot experiment is conducted to study the effects of mixed irrigation of brackish water and reclaimed water on soil exchangeable ions,total exchangeable bases,cation exchange capacity,exchange sodium percentage(ESP),etc.The results indicate that compared to pure irrigation of brackish water,the mixed irrigation of brackish water and reclaimed water in a 1:1 ratio reduces soil exchangeable sodium ion content,soil exchangeable calcium ion content,total exchangeable bases and cation exchange capacity by 59.43%,9.47%,24.88%and 20.82%,respectively,while increasing soil exchangeable magnesium and potassium ion contents by 25.94%and 57.89%,respectively.As the proportion of reclaimed water in the liquid mixture increases,soil exchangeable sodium ion content and ESP gradually significantly decrease,while soil exchangeable magnesium ion content shows a trend of significantly increasing.Total exchangeable bases and base saturation show a trend of gradually decreasing.Soil exchangeable sodium ion content,total exchangeable bases and ESP are all extremely significantly positively correlated with soil moisture,salinity,and water drop penetration time(WDPT)(P<0.01).Additionally,soil exchangeable base saturation is extremely significantly positively correlated with soil moisture and salinity(P<0.01)after the harvest.Both pH and soil total nitrogen(TN)content are extremely significantly negatively correlated with soil exchangeable sodium ion content,total exchangeable bases and ESP(P<0.01),and are significantly negatively correlated with soil exchangeable base saturation(P<0.05).To some extent,the results can provide theoretical reference on new modes of the safe utilization of brackish water.

关 键 词：土壤碱化度 阳离子交换量 微咸水 再生水 灌溉 

分 类 号：TV21[水利工程—水文学及水资源]