| 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 |
| Key Words: heavily saline\|alkaline land interlayer soil water infiltration drilling and sand filling southern Xinjiang region |
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| Abstract: |
| 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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