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Journal of Desert Research ›› 2025, Vol. 45 ›› Issue (3): 337-345.DOI: 10.7522/j.issn.1000-694X.2025.00059

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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

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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