高密度聚乙烯(HDPE)蜂巢式沙障对土壤水分的影响

doi:10.7522/j.issn.1000-694X.2019.00054

摘要/Abstract

摘要： 先以机械沙障固沙、再进行生物固沙，是常见的治沙模式。近年来传统材料沙障与新型材料沙障的固沙效果差异一直引人关注。用中子水分仪分别测定流沙、高密度聚乙烯（HDPE）蜂巢式沙障和半隐蔽草方格沙障内的土壤含水量，通过对比流沙和两种机械沙障铺设下的土壤含水量、土壤蓄水量对降雨的响应关系以及在植物不同生长时期下的不同土层土壤含水量变化，评价其固沙效果。结果表明：（1）两种机械沙障对土壤水分都有较好的蓄积效果，且HDPE蜂巢式沙障蓄水量高于草方格沙障（P < 0.001）；（2）在较长的干旱时间里，草方格沙障的土壤蓄水量变化比新型HDPE蜂巢式沙障滞后；（3） HDPE蜂巢式沙障和草方格沙障都有较好的保水效果，但HDPE蜂巢式沙障因高度持久的优势，保水效果更高；（4） HDPE蜂巢式沙障60~110 cm土层的土壤含水量明显高于草方格沙障土壤含水量且固沙时间越长效果越明显，从铺设中期开始HDPE蜂巢式沙障60~110 cm土层土壤含水量为7%的情况连续出现，有时部分土层会出现土壤含水量在8%以上的情况；（5） HDPE蜂巢式沙障对植物个体生长的间接作用比草方格沙障大。

关键词: 草方格沙障, HDPE蜂巢式沙障, 土壤含水量, 水量平衡方程

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

中图分类号:

李敏岚, 屈建军, 唐希明, 顿耀权, 陈晓莹, 吴婷, 宋乃平. 高密度聚乙烯(HDPE)蜂巢式沙障对土壤水分的影响[J]. 中国沙漠, 2020, 40(1): 136-144.

Li Minlan, Qu Jianjun, Tang Ximing, Dun Yaoquan, Chen Xiaoying, Wu Ting, Song Naiping. Influence of HDPE honeycomb sand fixation on soil moisture[J]. Journal of Desert Research, 2020, 40(1): 136-144.

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