Characteristics of herbaceous plant diversity in the understory of <i>Caragana korshinskii</i> sand-fixing forest of Baijitan in Lingwu

YU Shuang; LI Xiaowei; YANG Xuexia; WANG Ruixia; YANG Junlong; MA Long

doi:10.11829/j.issn.1001-0629.2023-0154

Pratacultural Science > 2024 > 41(9): 2084-2093. > DOI: 10.11829/j.issn.1001-0629.2023-0154

YU S, LI X W, YANG X X, WANG R X, YANG J L, MA L. Characteristics of herbaceous plant diversity in the understory of Caragana korshinskii sand-fixing forest of Baijitan in Lingwu. Pratacultural Science, 2024, 41(9): 2084-2093. DOI: 10.11829/j.issn.1001-0629.2023-0154

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Characteristics of herbaceous plant diversity in the understory of Caragana korshinskii sand-fixing forest of Baijitan in Lingwu

YU Shuang^{1, 2, 3, 4,},
LI Xiaowei^{1, 2, 3, 4, ,},
YANG Xuexia^{1, 2, 3, 4},
WANG Ruixia⁵,
YANG Junlong¹,
MA Long^{1, 2, 3, 4}

1.
College of Forestry and Prataculture, Ningxia University, Yinchuan 750021, Ningxia, China
2.
Ningxia Grassland and Animal Husbandry Engineering Technology Research Center, Ningxia University, Yinchuan 750021, Ningxia, China
3.
Key Laboratory for Model Innovation in Forage Production Efficiency, Ministry of Agriculture and Rural Affairs, Ningxia University, Yinchuan 750021, Ningxia, China
4.
Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Ningxia University, Yinchuan 750021, Ningxia, China
5.
Ningxia Lingwu Baijitan National Nature Reserve Administration, Lingwu 750400, Ningxia, China

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Corresponding author:
LI Xiaowei　E-mail: lxwbq@126.com
Received Date: March 25, 2023
Accepted Date: August 07, 2023
Available Online: August 19, 2024

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Abstract

Abstract

Species composition of understory vegetation is important for the stability and ecological function of Caragana korshinskii forests. In this study, a spatial method rather than temporal method was used to investigate and analyze the species composition and diversity of understory herbs in C. korshinskii sand-fixing forests of different ages (3, 5, 10, 20, 30, 40, 50, 60, and 70 a) located at the southwest edge of Mu Us Sandy Land. The results showed that:1) In each planting year, the number of herb species was the lowest at 10 a and the highest at 40 a, and the total number of plant species reached 38 up to August 2023; 2) With an increase in stand age, the importance value of annual herbaceous plants gradually decreased, and that of perennial herbaceous plants gradually increased; 3) The richness, diversity, and evenness indices of herbage in the C. korshinskii forest changed uniformly between 3～10 a, and decreased with the increase in stand age. Richness increased with the increase in stand age between 10～40 a. Diversity and evenness indices also increased with the increase in stand age between 10～30 a, and all indexes stabilized between 40～70 a; and 4) The similarity index of the understory herbaceous community fluctuated greatly between 3 to 30 a, but after 30 a, the similarity coefficient index of the understory herbaceous community exhibited minimal variation and gradually stabilized. This indicates that the herb community in the C. korshinskii forest gradually stabilized after 30 a of its establishment. Cultivation of C. korshinskii is conducive to the restoration of the desert ecosystem, and its proper care and management after 30 a of cultivation will be conducive to the maintenance of herb diversity in the forest.
- Caragana korshinskii sand-fixing forest,
- forest ages,
- herb,
- species diversity,
- community similarity

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Characteristics of herbaceous plant diversity in the understory of Caragana korshinskii sand-fixing forest of Baijitan in Lingwu

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