| 宁夏中部干旱带微咸水灌溉对砂土混合覆盖下土壤水盐运移的影响 |
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| 引用本文： | 徐天渊,贾振江,李王成,赵广兴,高海燕,王洁,赵相宇.宁夏中部干旱带微咸水灌溉对砂土混合覆盖下土壤水盐运移的影响[J].干旱地区农业研究,2021,39(5):138-144. |
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| 作者姓名： | 徐天渊 贾振江 李王成 赵广兴 高海燕 王洁 赵相宇 |
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| 作者单位： | 宁夏大学土木与水利工程学院,宁夏 银川750021;宁夏大学土木与水利工程学院,宁夏 银川750021;宁夏节水灌溉与水资源调控工程技术研究中心,宁夏 银川750021;旱区现代农业水资源高效利用教育部工程研究中心,宁夏 银川750021 |
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| 基金项目： | 国家自然科学基金（51869023）;宁夏回族自治区重点研发计划项目（引才专项）（2019BEB04029）;宁夏回族自治区高等学校一流学科建设（水利工程学科）资助项目（二期建设）（NXYLXK2021A03）;宁夏回族自治区重点研发计划项目（2019BEH03010） |
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| 摘 要： | 通过实地布设微型蒸渗仪模拟研究了低(2.5 L)、中(3.7 L)、高(5.0 L)微咸水灌溉量对0%、20%、40%、60%、80%、100%砂土混合比的土壤水盐运移规律及动态分布。结果显示:在相同灌溉量条件下,当砂土混合比为20%～100%时,累计蒸发量减小幅度可达42.22%～83.07%,表层含水率减小幅度为0.91%～28.91%,而深层含水率减小幅度仅为-2.14%～19.25%,增大砂土混合比对减少累计蒸发量有明显促进作用且增加了深层土壤含水率,可提高农业效能;与之对应的深层土壤盐分累计增加,盐分含量增幅为8.41%～31.9%,且比值越大,峰值出现的时间可能越早,位置越往土层深处推移。表明在宁夏中部干旱带采用砂土混合覆盖可有效减少土壤水分蒸发,抑制盐分表聚,减弱微咸水灌溉对土壤产生的次生危害。
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| 关 键 词： | 微咸水灌溉 砂土混合覆盖 水盐运移 累计蒸发量 宁夏 |
Effects of brackish water irrigation on water and salt transport under mixed sand cover in arid zone of central Ningxia |
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| XU Tianyuan,JIA Zhenjiang,LI Wangcheng,ZHAO Guangxing,GAO Haiyan,WANG Jie,ZHAO Xiangyu.Effects of brackish water irrigation on water and salt transport under mixed sand cover in arid zone of central Ningxia[J].Agricultural Research in the Arid Areas,2021,39(5):138-144. |
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| Authors: | XU Tianyuan JIA Zhenjiang LI Wangcheng ZHAO Guangxing GAO Haiyan WANG Jie ZHAO Xiangyu |
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| Abstract: | The water\|salt transport law and dynamic distribution of 0%, 20%, 40%, 60%, 80% and 100% sand mixing ratio under low (2.5 L), medium (3.7 L) and high (5.0 L) brackish water irrigation were studied by setting up micro\|lysimeter. Based on observation of soil, water, and salt distribution, the results indicated that under the same irrigation amount, when the sand mixing ratio was 20% to 100%, the decrease range of accumulated evaporation was 42.22% to 83.07%, the decrease range of surface water content was 0.91% to 28.91%, and the decrease range of deep water content was only -2.14% to 19.25%, increasing the sand mixing ratio significantly promoted the reduction of accumulated evaporation and increased the water content of deep soil, which could improve the agricultural efficiency. The corresponding deep soil salinity increased by 8.41% to 31.9%, and the larger the ratio was, the earlier the peak appeared, and the deeper the position moved. The conclusion manifested that sand and soil mixed mulching effectively reduced soil water evaporation, inhibited salt accumulation, and decreased the secondary harm of micro\|lysimeter irrigation to soil. |
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| Keywords: | brackish water irrigation mixed sand cover movement of soil water and salt cumulative evaporation Ningxia |
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