| Soil resalinization and water-salt movement under different mulching modes |
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| DOI：10.7606/j.issn.1000-7601.2016.05.32 |
| Key Words: mulching mode soil resalinization water-salt movement moisture content |
| Author Name | Affiliation | | ZHAO Wen-ju | School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China | | MA Hong | School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China | | DOU Pin-xin | School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China | | YU Wen | School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China |
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| Abstract: |
| The loss caused by surface evaporation in arid area of soil moisture is one of the important reasons for the crop yield under gravel-sand mulching. Gravel-sand mulching can change the surface structure, thus affecting the evaporation of soil water and water-salt movement. This paper studied soil resalinization and water-salt movement under different mulching modes through a field test. The result showed that the different mulching modes on soil surface could effectively inhibit soil water evaporation. For effect on soil water retention, the significance of different modes was as the follows: sand and plastic film mulching (SM)＞straw and sand mulching (JS)＞sand mulching (S)＞straw and plastic film mulching (JM)＞bare land (CK). The trend of soil moisture content became gradually decreased with the increase of soil depth. The different mulching mode could also effectively inhibit top enrichment of soil salt, and reduce the range of salt movement in the soil. Soil salt upward migration occurred mainly in the range of 0～20 cm soil layer, and occurred mainly in the range of 0～35 cm layer without mulching, indicating that mulching inhibited soil resalinization. In conclusion, the sand mulching (S) is a more suitable mulching mode in the test area. |
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