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中国沙漠 ›› 2022, Vol. 42 ›› Issue (1): 134-138.DOI: 10.7522/j.issn.1000-694X.2021.00138

• • 上一篇    

毛乌素沙地东南缘沙柳(Salix psammophila)群落枯落物抗风蚀特征

袁小琴1(), 刘生权2, 艾峰3, 张正3, 李强3(), 蒋晋豫4, 石长春4   

  1. 1.榆林市林木种苗工作站,陕西 榆林 719000
    2.榆林市林业工作站,陕西 榆林 719000
    3.榆林学院 陕西省陕北矿区生态修复重点实验室,陕西 榆林 719000
    4.陕西省林业科学院,陕西 西安 710082
  • 收稿日期:2021-06-16 修回日期:2021-10-14 出版日期:2022-01-20 发布日期:2022-01-28
  • 通讯作者: 李强
  • 作者简介:李强(E-mail: mr.li_qiang@163.com
    袁小琴(1975—),女,陕西米脂人,高级工程师,从事樟子松良种繁育和林木种苗生产管理。E-mail: 444394157@qq.com
  • 基金资助:
    国家自然科学基金项目(41807521);陕西省林业科技创新计划专项(SXLK2020-0205);陕西省青年科技新星基金项目(2020KJXX-037)

Wind erosion resistance of litter of Salix psammophila community in the southeast edge of Mu Us Sandy Land, China

Xiaoqin Yuan1(), Shengquan Liu2, Feng Ai3, Zheng Zhang3, Qiang Li3(), Jinyu Jiang4, Changchun Shi4   

  1. 1.Yulin Forest Seedling Workstation,Yulin 719000,Shaanxi,China
    2.Yulin Forestry Workstation,Yulin 719000,Shaanxi,China
    3.Shaanxi Key Laboratory of Ecological Restoration in Northern Shaanxi Mining Area,Yulin University,Yulin 719000,Shaanxi,China
    4.Shaanxi Academy of Forestry,Xi’an 710082,China
  • Received:2021-06-16 Revised:2021-10-14 Online:2022-01-20 Published:2022-01-28
  • Contact: Qiang Li

摘要:

地表枯落物是毛乌素沙地生态系统的重要组成部分,风蚀是影响枯落物蓄积量及再分配的重要因素。采用野外调查采样与室内人工模拟风洞试验相结合的研究方法,分析了沙柳(Salix psammophila)群落枯落物组分特征及其对土壤风蚀的影响。结果表明:(1)沙柳枯落物地表物质组成中枝和叶占比分别为56%和30%,且随着距沙柳基部距离的增大,枯落物量呈显著减小趋势;(2)随着沙柳枯落物量的增加,土壤流失量呈指数函数递减趋势,且以处理400 g·m-2为临界值;(3)与叶相比,沙柳群落枯落物的枝部分在抗风蚀方面起着主导作用。

关键词: 沙柳(Salix psammophila), 枯落物, 土壤风蚀, 毛乌素沙地

Abstract:

Surface litter is an important part of the ecosystem in Mu Us Sandy Land, and wind erosion is an important factor affecting litter volume and redistribution. In this paper, the characteristics of litter composition and its response to soil wind erosion of Salix psammophila community were analyzed by field investigation and indoor wind tunnel test. The results showed that: (1) Branches and leaves account for 56% and 30% of the surface material composition of Salix psammophila litter, respectively, and the litter biomass decreases significantly with the increase of the distance from the base of Salix psammophila (30-90 cm). (2) The soil loss decreases exponentially with the increase of the litter biomass (200-800 g·m-2), especially with the treatment of 400 g·m-2. (3) Compared with the leaves, the branches of Salix psammophila community litter play a leading role in wind erosion resistance. The research is expected to provide some scientific basis for vegetation construction and ecological reconstruction in Mu Us Sandy Land.

Key words: Salix psammophila, litter, soil wind erosion, Mu Us Sandy Land

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