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Journal of Desert Research ›› 2020, Vol. 40 ›› Issue (1): 136-144.DOI: 10.7522/j.issn.1000-694X.2019.00054

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Influence of HDPE honeycomb sand fixation on soil moisture

Li Minlan1, Qu Jianjun2, Tang Ximing3, Dun Yaoquan2, Chen Xiaoying1, Wu Ting1, Song Naiping1   

  1. 1. MOE Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwest China, Ningxia University, Yinchuan 750021, China;
    2. Dunhuang Gobi and Desert Ecology and Environment Research Station/Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
    3. Zhongwei Sand Control Forest Farm, Zhongwei City Forestry Ecological Construction Bureau, Zhongwei 755000, Ningxia, China
  • Received:2019-04-01 Revised:2019-05-09 Online:2020-01-20 Published:2020-01-18

Abstract: Using mechanical sand barrier sand fixation as a precursor to carry out biological sand fixation has been recognized as a model for engineering sand control. In recent years, the difference in sand-fixing effect between traditional material sand barriers and new material sand barriers has been attracting attention. The soil moisture content of the quicksand, the new HDPE honeycomb sand barrier and the semi-concealed wheat straw sand barrier were measured by neutron moisture meter. The sand-fixing effect was attempted by comparing the soil moisture content of the quicksand and the two kinds of mechanical sand barriers, the response of soil water storage to rainfall, and the change of soil water content in different soil layers under different growth stages. The results show that:(1) Two kinds of mechanical sand barriers have better water storage effect on soil moisture, and the new HDPE honeycomb sand barrier has higher water storage capacity than straw sand barrier, and the significant difference is less than 0.001, which is extremely significant difference; (2) During longer drought times, the change of soil water storage in straw sand barrier has a hysteresis compared with the soil water storage of the new HDPE honeycomb sand barrier; (3) the new HDPE honeycomb sand barrier and straw sand barrier It has better water retention effect, but the new HDPE honeycomb sand barrier has higher water retention effect due to its high durability; (4) The soil moisture content of the new HDPE honeycomb sand barrier 60-110 cm soil layer is significantly higher than that of straw. The effect of square soil water content and sand fixation time is more obvious. From the middle of laying, the new HDPE honeycomb sand barrier has a soil moisture content of 7% in 60-110 cm soil layer, and sometimes soil moisture will appear in some soil layers. More than 8%of the cases; (5) From the perspective of biological sand fixation in the sand control project, the indirect effect of the new HDPE honeycomb sand barrier on individual plant growth is larger than that of straw sand barrier.

Key words: straw sand barrier, HDPE honeycomb sand barrier, soil water content, water balance equation

CLC Number: