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Journal of Desert Research ›› 2020, Vol. 40 ›› Issue (5): 200-208.DOI: 10.7522/j.issn.1000-694X.2020.00098

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Soil moisture infiltration characteristics of different sand-fixing plants in the desert-oasis transition zone in arid region of China

Wei Gong(), Guanglu Hu(), Pengcheng Fu, Haoran Li, Chuan Zhou, Liyuan Deng   

  1. School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China
  • Received:2020-07-23 Revised:2020-09-06 Online:2020-09-28 Published:2020-09-28
  • Contact: Guanglu Hu

Abstract:

In order to explore the soil moisture infiltration characteristics of different sand-fixing plants in arid areas, three sand-fixing plants were selected in the desert-oasis transition zone in the middle reaches of the Heihe River in the north of Linze County, Gansu Province. The soil moisture infiltration was measured by the double-ring knife constant head test method, and carry out simulation and analysis of different models. The results show that: (1)The soil moisture infiltration rate has a negative correlation with the initial soil moisture content, and the correlation is significant at the initial stage of infiltration. (2)The initial infiltration rate, stable infiltration rate, and average infiltration rate of the three sand-fixing plants showed the order of Haloxylon ammodendron> Calligonum mongolicum>Nitraria sphaerocarpa, with significant differences (P<0.05). (3)The simulation of the soil moisture infiltration process of different sand-fixing plants shows that the Philip model is the best, the Horton model is second, and the Kostiakov model is the worst. The Philip model is more suitable for studying the soil moisture infiltration process of different sand-fixing plants in this area. Research can provide a scientific basis for the rational use of soil moisture in arid areas and the restoration and reconstruction of degraded ecosystems.

Key words: sand-fixing plants, soil moisture, infiltration process, infiltration characteristics, desert-oasis transition zone

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