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中国沙漠 ›› 2025, Vol. 45 ›› Issue (3): 337-345.DOI: 10.7522/j.issn.1000-694X.2025.00059

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宁夏盐池人工柠条( Caragana korshinskii )林草本群落特征

石苗苗1,2(), 霍建强2,3, 韩高玲2,3, 南益聪2,3, 朱小娟1, 虎瑞2(), 苏雪1()   

  1. 1.西北师范大学,甘肃 兰州 730070
    2.中国科学院西北生态环境资源研究院 沙坡头沙漠研究试验站/干旱区生态安全与可持续发展全国重点实验室,甘肃 兰州 730000
    3.中国科学院大学,北京 100049
  • 收稿日期:2025-03-31 修回日期:2025-05-09 出版日期:2025-05-20 发布日期:2025-06-30
  • 通讯作者: 虎瑞,苏雪
  • 作者简介:石苗苗(2001—),女,甘肃陇南人,硕士研究生,主要从事干旱区生态学研究。E-mail: 3074007849@qq.com
  • 基金资助:
    国家自然科学基金项目(U23A20223)

Characteristics of herbaceous community in revegetation Caraganakorshinskii shrublands in YanchiNingxiaChina

Miaomiao Shi1,2(), Jianqiang Huo2,3, Gaoling Han2,3, Yicong Nan2,3, Xiaojuan Zhu1, Rui Hu2(), Xue Su1()   

  1. 1.Northwest Normal University,Lanzhou 730070,China
    2.Shapotou Desert Research and Experiment Station / State Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    3.University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2025-03-31 Revised:2025-05-09 Online:2025-05-20 Published:2025-06-30
  • Contact: Rui Hu, Xue Su

摘要:

本研究以宁夏盐池1984、1996、2005、2015年的人工柠条(Caragana korshinskii)林的草本群落为对象,采用时空替代法,调查草本植物种类、数量等群落特征,测定土壤理化性质,探讨不同恢复年限下草本群落结构、相似性及物种多样性的变化特征,并分析影响群落变化的关键因素。结果表明:该区域草本物种共19科39属。随着植被恢复年限增加,草本物种丰富度和多样性指数呈波动性变化,且由于放牧原因,1996、2005年样地丰富度低于其余2个样地,2015年Shannon多样性指数最高,其次是1984年;同时,各样地间草本层群落差异性较大。此外,随着植被恢复,土壤有机碳、全氮、微生物量碳氮的含量均呈增加趋势,同时,较高的土壤有机碳和微生物量碳氮也增加了草本植被盖度、多度、地上生物量,并且浅层土壤含水量(20~60 cm)决定了草本植被丰富度和多样性。

关键词: 沙区, 人工柠条林, 草本群落变化, 不同年限, 放牧, 土壤理化性质

Abstract:

This study focused on the herbaceous communities in revegetation Caraganakorshinskii shrubland plots in Yanchi, Ningxia, from four different years:1984, 1996, 2005, and 2015. Using a space-for-time substitution method, the research investigated community characteristics such as species and abundance of herbaceous plants, measured soil physical and chemical properties, and explored the changes in community structure, similarity, and species diversity under different years. The study also analyzed key factors influencing community changes. Results showed a total of 39 genera belonging to 19 families of herbaceous species in the area. With the increase in vegetation restoration years, the richness and diversity index of herbaceous species generally showed fluctuating changes. And this was due to grazing activities, the richness in the 1996 and 2005 plots was lower than in the other two plots. The 2015 plot had the highest Shannon diversity index, followed by the 1984 plot, with significant differences in the herbaceous layer community structure among plots. In addition, with the restoration of vegetation, the contents of soil organic carbon, total nitrogen, microbial biomass carbon and nitrogen all showed an increasing trend. Meanwhile, higher soil organic carbon and microbial biomass carbon and nitrogen also increased the coverage, abundance and aboveground biomass of herbaceous vegetation. Moreover, the soil water content in the shallow layer (20-60 cm) determined the richness and diversity of herbaceous vegetation.

Key words: sandy area, Caragana korshinskii shrubland, herbaceous community changes, different years, grazing, soil physical and chemical properties

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