草地学报

不同放牧强度下荒漠草原短花针茅丛枝菌根真菌侵染特征及其影响因素

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刘昭岐, 王琪, 郑佳华, 张峰, 李邵宇, 杨立山, 张彬, 乔荠瑢, 赵萌莉, 徐龙超, 王宁斌, 周清格, 邓扬臻, 王锡湲, 陈信力, 季祥, 王忠武

草地学报 | 研究论文 2026,34(2): 469-477

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草地学报 |研究论文 2026 , 34 (2) : 469 -477

不同放牧强度下荒漠草原短花针茅丛枝菌根真菌侵染特征及其影响因素

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刘昭岐, 王琪, 郑佳华, 张峰, 李邵宇, 杨立山, 张彬, 乔荠瑢, 赵萌莉, 徐龙超, 王宁斌, 周清格, 邓扬臻, 王锡湲, 陈信力, 季祥, 王忠武

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刘昭岐（1999-），男，蒙古族，内蒙古赤峰人，硕士研究生，主要从事草地生态研究，E-mail:2459952261@qq.com

Effects of Grazing Intensities on AMF Colonization of Stipa breviflora and their influencing factors in Desert Steppe

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doi: 10.11733/j.issn.1007-0435.2026.02.009

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丛枝菌根真菌（Arbuscular mycorrhizal fungi，AMF）在维持草原生态系统功能中发挥着重要作用。放牧作为草原主要的利用方式之一，对植物和AMF的共生关系影响深远。为探究放牧对荒漠草原建群植物短花针茅（Stipa breviflora）与AMF的共生关系的调控作用及其驱动机制，本研究基于内蒙古短花针茅荒漠草原，研究了不同放牧强度[不放牧（No grazing，CK）、轻度放牧（Light grazing，LG）、中度放牧（Moderate grazing，MG）和重度放牧（Heavy grazing，HG）]对短花针茅AMF侵染率的影响。结果表明：短花针茅AMF侵染率随放牧强度增加显著降低，不同放牧强度下短花针茅AMF侵染率分别为65.89%，59.89%，52.89%和41.33%。孢子密度和菌丝密度随放牧强度增加而降低。随放牧强度增加，短花针茅总根长增加，根直径降低，土壤紧实度与pH值升高，土壤有机碳、有效磷含量下降，而土壤含水量、硝态氮含量在轻度放牧时最高，其中土壤硝态氮和有效磷是调控短花针茅根系AMF侵染率变化的主要因子。综上所述，在荒漠草原中，放牧通过减少土壤中的氮磷养分有效性影响AMF定殖。本研究为荒漠草原生态系统的科学放牧管理提供了数据支持和理论基础。

关键词

荒漠草原 / 放牧 / 短花针茅 / 菌根侵染率

Abstract

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Arbuscular Mycorrhizal Fungi （AMF） play an important role in maintaining the function of grassland ecosystems. Grazing is one of the main utilization modes of grasslands， which has a profound effect on the symbiotic relationship between plants and AMF. However， the regulatory effects of grazing on the Stipa breviflora-AMF symbiosis and its driving mechanisms remain unknown. This study， conducted in the S. breviflora grassland of Inner Mongolia， examined the effects of different grazing intensities—no grazing， light grazing （LG）， moderate grazing （MG）， and heavy grazing （HG）—on the AMF colonization rate in S. breviflora roots. The results revealed a significant decline in the AMF colonization rate with increasing grazing intensity. The colonization rates were 65.89%， 59.89%， 52.89% and 41.33% under different grazing intensities， respectively. Spore density and hyphal length density decreased with increasing grazing intensity. In addition， increased grazing intensity led to longer total root length and smaller root diameter in S. breviflora， along with higher soil density and pH but lower soil organic carbon and available phosphorus. However， soil moisture and nitrate nitrogen content peaked under light grazing. Soil nitrate nitrogen and available phosphorus were identified as the primary factors influencing the reduction in AMF colonization. In conclusion， grazing negatively affects AMF colonization in desert steppes by decreasing nitrogen and phosphorus nutrient effectiveness in the soil. This study provides empirical data and theoretical insights that support the development of sustainable grazing management strategies to maintain the health and resilience of desert steppe ecosystems.

Key words

Desert steppe / Grazing / Stipa breviflora / Mycorrhizal infection rate

引用本文

刘昭岐, 王琪, 郑佳华, 张峰, 李邵宇, 杨立山, 张彬, 乔荠瑢, 赵萌莉, 徐龙超, 王宁斌, 周清格, 邓扬臻, 王锡湲, 陈信力, 季祥, 王忠武. 不同放牧强度下荒漠草原短花针茅丛枝菌根真菌侵染特征及其影响因素. 草地学报, 2026 , 34 (2) : 469 -477 . DOI: 10.11733/j.issn.1007-0435.2026.02.009

LIU Zhao-qi, WANG Qi, ZHENG Jia-hua, ZHANG Feng, LI Shao-yu, YANG Li-shan, ZHANG Bin, QIAO Ji-rong, ZHAO Meng-li, XU Long-chao, WANG Ning-bin, ZHOU Qing-ge, DENG Yang-zhen, WANG Xi-yuan, CHEN Xin-li, JI Xiang, WANG Zhong-wu. Effects of Grazing Intensities on AMF Colonization of Stipa breviflora and their influencing factors in Desert Steppe[J]. Acta Agrestia Sinica, 2026 , 34 (2) : 469 -477 . DOI: 10.11733/j.issn.1007-0435.2026.02.009

基金

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国家重点研发计划 (2024YFF1309000); 国家重点研发计划 (2023YFF1304104)

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2026年第34卷第2期

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doi: 10.11733/j.issn.1007-0435.2026.02.009

接收时间：2025-02-08
首发时间：2026-09-23

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收稿日期：2025-02-08
修回日期：2025-03-20

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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