| 刘洪波,栗现文,白云岗,卢震林,张博.南疆重盐碱地夹层土壤水分入渗特征[J].干旱地区农业研究,2025,(3):90~98 |
| 南疆重盐碱地夹层土壤水分入渗特征 |
| Infiltration characteristics of soil moisture in the stratified soil of heavily saline\|alkaline land in Southern Xinjiang |
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| DOI：10.7606/j.issn.1000-7601.2025.03.10 |
| 中文关键词: 重盐碱地 夹层土壤 水分入渗 打孔灌沙 南疆地区 |
| 英文关键词:heavily saline\|alkaline land interlayer soil water infiltration drilling and sand filling southern Xinjiang region |
| 基金项目:新疆维吾尔自治区重大科技专项（2022A02007-3）；新疆维吾尔自治区天山英才科技创新领军人才培养项目（2022TSYCLJ0069） |
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| 中文摘要: |
| 为探明重盐碱地夹层土壤在不同情景下的水分入渗特征，对水分入渗曲线、湿润锋、累积入渗量等指标进行监测。结果表明：在夹层排序相同、灌水量不同时，随着灌水量增大，水分入渗率增大，湿润锋运移距离增加但均未入渗到最底层。在相同灌水量下，夹层厚度增加或夹层位置上移对夹层上下层的土壤含水率、湿润锋运移推进时间和累积入渗量的影响更大。打孔灌沙可提高水分入渗率，减少湿润锋运移时间，改善了各土层的剖面含水率，其湿润锋运移深度可达到100 cm外，其他处理中最大仅87.8 cm，Kostiakov模型能较好地模拟重盐碱地不同剖面构型夹层土壤水分的入渗特性。综上，在重盐碱土壤含夹层的条件下，灌水量过低或夹层上移与加厚均不利于水分入渗，建议在南疆重盐碱地夹层土壤位置在60~80 cm、厚度为10~15 cm的区域，适宜灌水量应在3 150 m3·hm-2以上，结合打孔灌沙措施则能显著改善重盐碱地夹层土壤的水分入渗特性。 |
| 英文摘要: |
| The water infiltration curve, wetting front, and cumulative infiltration were monitored to determine the water infiltration characteristics of the interlayer soil under different scenarios. The results showed that, with the increase of irrigation amount, the water infiltration rate and the migration distance of wet front increased but did not penetrate to the lowest layer. Under the same irrigation volume, the increase of interlayer thickness compared with the increase of interlayer position, the change of soil moisture content above and below interlayer was greater, and the advance time of wetting front migration and cumulative infiltration were slightly higher. Drilling sand irrigation improved the water infiltration rate, reduced the time of wet front migration, and improved the profile water content of each soil layer. The depth of wet front migration could reach 100 cm, while the maximum was only 87.8 cm in other treatments. Kostiakov model could well simulate the water infiltration characteristics of interlayer soil with different profile configurations in heavy saline\|alkali land. To sum up, under the condition that the heavy saline\|alkali soil contains interlayer, too low irrigation water or interlayer moving up and thickening are not conducive to water infiltration. It is suggested that for areas with interlayer soil 60~80 cm deep and 10~15 cm thick in the heavy saline\|alkali soil of southern Xinjiang, appropriate irrigation should exceed 3 150 m3·hm-2, combined with drilling and sand irrigation treatment. This approach can significantly improve the water infiltration characteristics of the interlayer soil in heavy saline\|alkali conditions. |
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