| Effect of sand mulching on spatiotemporal variation of soil water content during the seasonal freezing-thawing period |
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| DOI：10.7606/j.issn.1000-7601.2019.05.07 |
| Key Words: seasonal freezing-thawing period sand mulching soil water content in farmland dynamic change |
| Author Name | Affiliation | | FENG Hui-jun | College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China | | ZHAO Hao-ran | College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China | | ZHENG Xiu-qing | College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China | | CHEN Jun-feng | College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China | | MIAO Chun-yan | College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China
First Hydrogeology and Engineering Geological Team of Shanxi Province, Taiyuan, Shanxi 030024, China | | XUE Jing | College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China |
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| Abstract: |
| The effect of sand mulching on soil water content was studied during the seasonal freezing-thawing period. A field experiment, involving bare plot (LD), sand mulches of particle size of 0.5~1.5 mm (XS) and 1.5~2.0 mm (CS), was set up in Taigu Water Balance Experimental Field to monitor soil water content in the soil layer of 0~100 cm. The results showed that, two higher-soil-moisture areas were formed with sand mulching treatments, which located at the near-surface of 20~40 cm. Soil water content on surface varied from 15.40% to 21.79% and ranged from 15.99% to 19.94% in the layer of 20~40 cm. Sand mulches had a significant effect on storing water, and the effect decreased with increasing soil depth. Sand mulching treatments resulted in more stored water in surface soil with value-added ranging from 8.45% to 10.94% of soil water content. Sand mulching treatments resulted less water storage in the layer of 0~40 cm with value-added varying from 1.56% to 1.62%. The differences of soil water content between the three treatments in the layer of 40~100 cm were slight, ranging from 0.09% to 0.40%. In addition, the effect of sand mulching on water storage was related to the particles size of sand. The water storage of XS treatment in the 0~5 cm layer was better than that of CS treatment. Soil water content of XS treatment in the layer of 0~5 cm was 0.57%~2.39% higher than that of CS treatment. Sand mulching resulted in a reduction of variations on surface soil water content, which reduced variations about 4.42%. |
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