Effects of Degradation Stages on the Relationship Between Species Diversity and Soil Nutrients in Typical Steppe

doi:10.11733/j.issn.1007-0435.2025.09.014

Acta Agrestia Sinica ›› 2025, Vol. 33 ›› Issue (9): 2890-2899.DOI: 10.11733/j.issn.1007-0435.2025.09.014

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Effects of Degradation Stages on the Relationship Between Species Diversity and Soil Nutrients in Typical Steppe

DUAN Jun-guang¹, FANG Kai¹, CHU Jian-min^1,2, WANG Ying-xin³, ZHANG Qi¹

1. Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China;
2. Experimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou, Inner Mongolia 015200, China;
3. Research Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing 100091, China

Received:2024-11-27 Revised:2024-12-30 Online:2025-09-15 Published:2025-09-22

退化程度对典型草原物种多样性和土壤养分关系的影响

段俊光¹, 房凯¹, 褚建民^1,2, 王迎新³, 张琦¹

1. 中国林业科学研究院林业研究所, 北京 100091;
2. 中国林业科学研究院沙漠林业实验中心, 内蒙古磴口 015200;
3. 中国林业科学研究院生态保护与修复研究所, 北京 100091

通讯作者: 褚建民，E-mail：cjmcaf@163.com
作者简介:段俊光（2000-），男，汉族，湖南岳阳人，硕士研究生，主要从事退化草地修复研究，E-mail：DUANJG2000@163.com
基金资助:
中央级公益性科研院所基本科研业务费专项资金（CAFYBB2020ZB001）；中国科学院战略性先导科技专项（A类）（XDA26020102）资助

Abstract

Abstract: Grassland degradation significantly impedes the sustainable development of grassland ecosystem. Investigating the interrelationship between plant diversity and soil nutrients across different stages of degradation at a large spatial scale， is crucial for the effective restoration of degraded grassland ecosystem. Our study targeted three typical steppes in Xilin Gol with different degrees of degradation （Slight， moderate， and severe）. Through field surveys and measurements of plant species diversity and soil nutrient characteristics， our study aimed to analyze the interrelationships between these two factors across degradation stages. Our results indicated that as degradation intensifies， the abundance of annual and biennial herbaceous species increased， while that of perennial herbaceous species decreased， resulting in changes to the plant community structure. Species diversity peaked at the moderate degradation stage， while overall soil nutrient levels were the lowest in severely degraded grasslands. Correlation matrix analysis revealed that as degradation progresses， the primary limiting soil nutrient factor shifted from nitrogen to phosphorus. The relationship between plant species diversity and soil nutrients transitioned from a positive to a significant negative correlation， and the consistency between plant diversity and soil nutrient changed diminishes. These findings suggest that， in the restoration of degraded grasslands， it is essential to place greater emphasis on the vegetation-soil relationship. Strengthening comprehensive monitoring of ecosystem structure and function will provide a theoretical basis for the development of scientifically grounded grassland restoration and management strategies.

Key words: Typical steppe, Grassland degradation, Species diversity, Soil nutrients, Redundancy analysis

摘要： 草地退化严重制约了生态系统可持续发展，研究大尺度范围下不同退化阶段植物多样性与土壤养分的关系对草地恢复具有重要意义。本研究以锡林郭勒轻度、中度、重度退化典型草原为对象，通过野外调查和测定植物物种多样性及土壤养分特征，分析二者在不同退化阶段的相互关系。结果表明：随退化程度加剧，一二年生草本物种多度增加，多年生草本物种多度降低，植物群落结构发生改变，物种多样性在中度退化阶段最高；土壤养分整体水平在重度退化阶段最低。相关性分析显示，随退化程度加剧，土壤养分限制因子由氮转变为磷，物种多样性与土壤养分的关系由正相关转为显著负相关，二者变化的一致性降低。研究表明，在草原生态修复中，应加强对植被-土壤关系的关注，强化对生态系统整体结构与功能的全面监控，为科学制定草原修复管理措施提供理论依据。

关键词: 典型草原, 草地退化, 物种多样性, 土壤养分, 冗余分析

CLC Number:

S812.6

DUAN Jun-guang, FANG Kai, CHU Jian-min, WANG Ying-xin, ZHANG Qi. Effects of Degradation Stages on the Relationship Between Species Diversity and Soil Nutrients in Typical Steppe[J]. Acta Agrestia Sinica, 2025, 33(9): 2890-2899.

段俊光, 房凯, 褚建民, 王迎新, 张琦. 退化程度对典型草原物种多样性和土壤养分关系的影响[J]. 草地学报, 2025, 33(9): 2890-2899.

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Effects of Degradation Stages on the Relationship Between Species Diversity and Soil Nutrients in Typical Steppe

退化程度对典型草原物种多样性和土壤养分关系的影响

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