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中国沙漠 ›› 2025, Vol. 45 ›› Issue (3): 191-197.DOI: 10.7522/j.issn.1000-694X.2025.00064

• • 上一篇    下一篇

麦草和高密度聚乙烯沙障对地表温度的影响

杜晟仲1(), 何明珠2, 郭源上1, 辛春明2,3, 秦慧君2,3, 韩国君1()   

  1. 1.甘肃农业大学 资源与环境学院,甘肃 兰州 730070
    2.中国科学院西北生态环境资源研究院 干旱区生态安全与可持续发展重点实验室/沙坡头沙漠研究试验站,甘肃 兰州 730000
    3.中国科学院大学,北京 100000
  • 收稿日期:2024-11-18 修回日期:2025-03-27 出版日期:2025-05-20 发布日期:2025-06-30
  • 通讯作者: 韩国君
  • 作者简介:杜晟仲(2000—),男,甘肃靖远人,硕士研究生,主要研究方向为干旱区资源利用与植物保护。E-mail: 1443561101@qq.com
  • 基金资助:
    甘肃省自然科学基金重点项目(24JRRA081)

Influence of straw checkerboards and high-density polyethylene sand barriers on soil surface temperature

Shengzhong Du1(), Mingzhu He2, Yuanshang Guo1, Chunming Xin2,3, Huijun Qin2,3, Guojun Han1()   

  1. 1.College of Resources and Environment,Gansu Agricultural University,Lanzhou 730070,China
    2.Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands / Shapotou Desert Research and Experiment Station,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    3.University of Chinese Academy of Sciences,Beijing 100000,China
  • Received:2024-11-18 Revised:2025-03-27 Online:2025-05-20 Published:2025-06-30
  • Contact: Guojun Han

摘要:

麦草和高密度聚乙烯(HDPE)沙障在工程治沙中广泛应用。当前研究更多地聚焦于固沙材料的防风固沙效应,然而有关固沙材料对地表温度长期影响的研究相对缺乏。本研究通过连续3年地表温度监测,揭示麦草和HDPE沙障对土壤热量平衡的影响,可为固沙工程中材料的优化选择、生态风险防控及工程设计提供依据。试验以乌(海)-玛(沁)高速中卫市腾格里沙漠路段风沙防护体系的HDPE沙障、麦草沙障及未铺设沙障的流沙(CK)为研究对象,利用地表温度计连续监测2021—2023年地表温度,对比研究了两种固沙材料在不同时间尺度(日、季节、年)的地表温度差异。结果表明:(1)HDPE沙障的日均地表温度最高(41.75 ℃),其次为CK(39.44 ℃),麦草沙障最低(38.14 ℃)。(2)秋季3种处理间地表温度无显著差异,而春、夏、冬季,CK与HDPE沙障地表温度相近,均显著高于麦草沙障(P<0.001)。(3)HDPE沙障全年地积温最高,麦草沙障最低;2021—2023年,麦草沙障地表温度呈明显下降趋势,而CK与HDPE沙障略有上升。(4)各处理的地表温度与气温均显著正相关。HDPE沙障导热性强,显著提高地表温度,而麦草沙障增温效应较弱,更利于改善土壤水分条件,促进固沙植物生长,从而加速流沙固定、表层土壤形成和植被恢复。

关键词: 麦草沙障, HDPE沙障, 地表温度

Abstract:

This study investigates the long-term effects of two commonly used sand fixation materials, wheat straw and high-density polyethylene (HDPE) sand barriers, on surface temperature in the Tengger Desert along the Wuwei-Maqin Expressway. Through continuous surface temperature monitoring from 2021 to 2023, the results reveal that HDPE sand barriers exhibited the highest daily average surface temperature (41.75 ℃), followed by bare sand (CK, 39.44 ℃), and wheat straw barriers (38.14 ℃). Seasonal analysis showed no significant differences in autumn, but in spring, summer, and winter, CK and HDPE had similar temperatures, both significantly higher than wheat straw (P<0.001). Monthly accumulated temperature trends indicated HDPE had the highest annual accumulation, while wheat straw showed a declining trend over the study period. Surface temperature was positively correlated with air temperature across all treatments. The findings suggest that HDPE sand barriers, with higher thermal conductivity, significantly increase surface temperature, whereas wheat straw barriers, with weaker warming effects, are more conducive to improving soil moisture conditions, promoting plant growth, and accelerating sand fixation, topsoil formation, and vegetation restoration. This study provides critical insights for optimizing material selection and ecological risk management in sand fixation engineering.

Key words: straw checkerboards, HDPE sand barrier, surface temperature

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