Effects of Grazing on Leaf Functional Traits of Dominant Plants and Aboveground Biomass of Community in Desert Steppe

doi:10.11733/j.issn.1007-0435.2026.05.018

Acta Agrestia Sinica ›› 2026, Vol. 34 ›› Issue (5): 1764-1775.DOI: 10.11733/j.issn.1007-0435.2026.05.018

Effects of Grazing on Leaf Functional Traits of Dominant Plants and Aboveground Biomass of Community in Desert Steppe

ZHAO Jia-le¹, WANG Zi-han¹, WANG Zhong-wu¹, Lü Shi-jie¹, ZHANG Xing-fu²

1. College of Grassland Science and Technology, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China;
2. Inner Mongolia Agricultural and Animal Husbandry Academy, Hohhot, Inner Mongolia 010020, China

Received:2025-07-31 Revised:2025-12-19 Published:2026-05-08

放牧对荒漠草原优势植物叶功能性状和植物群落地上生物量的影响

赵佳乐¹, 王梓晗¹, 王忠武¹, 吕世杰¹, 张兴夫²

1. 内蒙古农业大学草业学院, 内蒙古呼和浩特 010018;
2. 内蒙古自治区农牧业科学院, 内蒙古呼和浩特 010020

通讯作者: 王忠武，E-mail:wangzhongwu@imau.edu.cn
作者简介:赵佳乐（2000-），女，内蒙古巴彦淖尔人，汉族，硕士研究生，主要从事草地资源生态与管理研究，E-mail:15147410857@163.com；
基金资助:
内蒙古农业大学一流学科科研专项（YLXKZX-NND-002）；内蒙古科技重大专项（2024JBGS0011）；国家自然科学基金（32460353）资助

Abstract

Abstract: This study investigated the effects of different grazing intensities on leaf functional traits and aboveground biomass of Stipa breviflora and Cleistogenes songorica in desert steppe of Inner Mongolia. Based on the long-term grazing platform， no grazing （CK）， light grazing （LG）， moderate grazing （MG） and heavy grazing （HG） treatments were set up. The relationships between aboveground biomass of plant community and the quantitative characteristics of dominant plants and leaf functional traits were analyzed. The results showed that with the increase of grazing intensity， the average height， total coverage and aboveground biomass of plant communities decreased significantly（P<0.05）. The density was the highest in MG treatment. The leaf functional traits of S.breviflora decreased with the increase of grazing intensity， but the leaf dry matter content of C.songorica increased significantly. The aboveground biomass of plant community was significantly positively correlated with the height of two dominant plants and negatively correlated with the density. The decrease of specific leaf area and the increase of leaf dry matter content of C.songorica inhibited the accumulation of aboveground biomass of plant community. Therefore， under moderate grazing， dominant plants adjusted leaf functional traits and population structure to maintain grassland productivity and ecosystem stability； heavy grazing led to the degradation of ecosystem function.

Key words: Grazing intensity, Desert steppe, Leaf functional traits, Aboveground biomass, Dominant plants

摘要： 为探讨不同放牧强度对优势植物短花针茅（Stipa breviflora）和无芒隐子草（Cleistogenes songorica）叶功能性状及地上生物量的影响，依托长期放牧平台，设置对照（CK）、轻度放牧（LG）、中度放牧（MG）和重度放牧（HG）处理。分析探究植物群落地上生物量与优势植物数量特征及叶功能性状的关系。结果表明：随放牧强度增加，植物群落平均高度、盖度和地上生物量显著降低（P<0.05）；密度在MG区最高。短花针茅的叶功能性状随放牧强度增加呈下降趋势，但无芒隐子草的叶干物质含量显著升高。植物群落地上生物量与两种优势植物的高度呈显著正相关，与密度呈负相关。无芒隐子草比叶面积的降低与叶片干物质含量的升高共同抑制了植物群落地上生物量的积累。因此，适度放牧，优势植物通过调整叶功能性状和种群结构维持草地生产力与生态系统的稳定；而重度放牧导致生态系统功能退化。

关键词: 放牧强度, 荒漠草原, 叶功能性状, 地上生物量, 优势种群

CLC Number:

S812.6

ZHAO Jia-le, WANG Zi-han, WANG Zhong-wu, Lü Shi-jie, ZHANG Xing-fu. Effects of Grazing on Leaf Functional Traits of Dominant Plants and Aboveground Biomass of Community in Desert Steppe[J]. Acta Agrestia Sinica, 2026, 34(5): 1764-1775.

赵佳乐, 王梓晗, 王忠武, 吕世杰, 张兴夫. 放牧对荒漠草原优势植物叶功能性状和植物群落地上生物量的影响[J]. 草地学报, 2026, 34(5): 1764-1775.

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Effects of Grazing on Leaf Functional Traits of Dominant Plants and Aboveground Biomass of Community in Desert Steppe

放牧对荒漠草原优势植物叶功能性状和植物群落地上生物量的影响

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