放牧强度对荒漠草原土壤微生物群落特征的影响

张蒙蒙; 徐国策; 张铁钢; 方康; 拓梦瑶; 万顺; 王斌

doi:10.13870/j.cnki.stbcxb.2024.03.009

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放牧强度对荒漠草原土壤微生物群落特征的影响

更新时间：2025-03-12

- 放牧强度对荒漠草原土壤微生物群落特征的影响
- Effects of Grazing Intensity on Soil Microbial Community Characteristics in Desert Steppe
- 水土保持学报 2024年38卷第3期页码：306-313
- 作者机构：
  
  1. 西安理工大学省部共建西北旱区生态水利国家重点实验室,西安,710048
  2. 中国水利水电科学研究院内蒙古阴山北麓草原生态水文国家野外科学观测研究站,呼和浩特,010020
- 作者简介：
  
  [ "张蒙蒙(1999—),女,内蒙古乌兰察布人,硕士研究生,主要从事水土保持研究。E-mail:zhangmm1015@163.com" ]
- 基金信息：
  
  国家重点研发计划项目(2022YFF1300803);中国水利水电科学研究院内蒙古阴山北麓草原生态水文国家野外科学观测研究站开放研究基金项目(YSS202113);国家自然科学基金项目(42167007);内蒙古自治区科技成果转化项目(2021CG0012)
- DOI：10.13870/j.cnki.stbcxb.2024.03.009
  中图分类号： S154.3
- 纸质出版：2024
- 稿件说明：
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张蒙蒙, 徐国策, 张铁钢, 等. 放牧强度对荒漠草原土壤微生物群落特征的影响[J]. 水土保持学报, 2024,38(3):306-313.

ZHANG Mengmeng, XU Guoce, ZHANG Tiegang, et al. Effects of Grazing Intensity on Soil Microbial Community Characteristics in Desert Steppe[J]. 2024, 38(3): 306-313.
张蒙蒙, 徐国策, 张铁钢, 等. 放牧强度对荒漠草原土壤微生物群落特征的影响[J]. 水土保持学报, 2024,38(3):306-313. DOI： 10.13870/j.cnki.stbcxb.2024.03.009.

ZHANG Mengmeng, XU Guoce, ZHANG Tiegang, et al. Effects of Grazing Intensity on Soil Microbial Community Characteristics in Desert Steppe[J]. 2024, 38(3): 306-313. DOI： 10.13870/j.cnki.stbcxb.2024.03.009.

摘要

[目的] 研究土壤微生物群落对放牧强度变化的响应机理

为荒漠草原生态保护和修复提供科学的理论和技术支撑。[方法] 以内蒙古荒漠草原为研究对象

研究不同放牧强度(未放牧、轻度放牧、中度放牧、重度放牧)对不同深度(0—20

20—40 cm)土壤理化性质和土壤微生物群落组成及多样性的影响

分析土壤理化性质与土壤微生物群落间的交互作用。[结果] 相比于未放牧

中度放牧显著降低0—20 cm土层土壤全氮(TN)和土壤有机碳(TOC)(p＜0.05)

分别降低17.99%和19.23%

土壤容重(SBD)最大值出现在重度放牧条件下。20—40 cm土层土壤理化性质在不同放牧强度下并无显著差异(p＞0.05)。此外

放牧降低0—20 cm土层土壤中细菌群落的丰度和多样性

增加20—40 cm土层土壤细菌中群落的丰度与多样性。轻度和中度放牧条件下

0—20 cm土层土壤真菌群落的丰度与多样性均有所增加

放牧对20—40 cm土层土壤真菌群落的丰度与多样性无显著影响(p＞0.05)。[结论] Mantel分析表明

荒漠草原土壤全氮是影响草原土壤细菌丰度随放牧强度变化的主要因素。研究成果对揭示土壤微生物在荒漠草原生态系统中的生态敏感性与实现荒漠草原的可持续管理具有一定科学指导意义。

Abstract

[Objective] Investigating the response mechanism of soil microbial communities to changes in grazing intensity can provide scientific theoretical and technical support for ecological protection and restoration of desert steppe. [Methods] Taking the desert steppe in Inner Mongolia as the research object

we studied the effects of different grazing intensities (no grazing

light grazing

medium grazing

and high grazing) on soil physicochemical properties and the composition and diversity of soil microbial communities at different soil depths (0—20 cm and 20—40 cm)

the interactions between soil physicochemical properties and soil microbial communities were analyzed. [Results] Compared to no grazing

medium grazing significantly (p<0.05) reduced the soil total nitrogen (TN) content (by 17.99%) and soil organic carbon (TOC) content (by 19.23%) at 0—20 cm depth. The maximum value of soil bulk density (SBD) appeared under high grazing conditions. The soil physicochemical properties at 20—40 cm depth showed no differences (p>0.05) under different grazing intensities. In addition

grazing decreased the abundance and diversity of bacterial communities at 20—40 cm depth

while increased the abundance and diversity of bacteria communities at 20—40 cm depth. Under light and moderate grazing conditions

the abundance and diversity of soil fungal communities at 0—20 cm depth increased

with no significant effect (p>0.05) on the abundance and diversity of soil fungal communities at 20—40 cm depth. [Conclusion] Mantel tests showed that total nitrogen of desert steppe soil was the primary factor influencing the change of desert steppe soil bacterial abundance with grazing intensity. The research results contribute to understanding the ecological sensitivity of soil microbes and offer scientific guidance for achieving sustainable management in desert steppe ecosystems.

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