不同放牧强度对短花针茅荒漠草原土壤酶活性的影响及其驱动因素

doi:10.11733/j.issn.1007-0435.2026.07.024

草地学报 ›› 2026, Vol. 34 ›› Issue (7): 2615-2623.DOI: 10.11733/j.issn.1007-0435.2026.07.024

• 研究论文 • 上一篇

不同放牧强度对短花针茅荒漠草原土壤酶活性的影响及其驱动因素

薛逸凡¹, 王宁斌², 李邵宇¹, 樊佳悦¹, 吕金岭¹, 茶俊香¹, 孙海淋¹, 张峰¹, 张彬¹, 赵萌莉¹

1. 内蒙古农业大学草业学院/草地资源教育部重点实验室, 内蒙古呼和浩特 010019;
2. 内蒙古农业大学生命科学学院, 内蒙古呼和浩特 010019

收稿日期:2025-11-07 修回日期:2026-02-26 发布日期:2026-07-02
通讯作者: 张峰，E-mail:nmgzhangfeng@126.com
作者简介:薛逸凡（2005-），男，蒙古族，内蒙古锡林郭勒人，本科生，主要从事草地生态学研究，E-mail:nmgxueyifan@163.com
基金资助:
内蒙古自治区自然科学基金项目（2024QN03049）；草学一流学科科研专项（YLXKZX-NND-040）；内蒙古农业大学高层次人才引进科研项目（NDYB2023-16）；内蒙古自治区草种质创新与草地资源可持续利用重点实验室（2025KYPT0040）；中国科协青年人才托举工程项目资助

Effects of Different Grazing Intensities on Soil Enzyme Activities and Driving Factors in Stipa breviflora Desert Steppe

XUE Yi-fan¹, WANG Ning-bin², LI Shao-yu¹, FAN Jia-yue¹, Lü Jin-ling¹, CHA Jun-xiang¹, SUN Hai-lin¹, ZHANG Feng¹, ZHANG Bin¹, ZHAO Meng-li¹

1. College of Grassland Science, Inner Mongolia Agricultural University, Key Laboratory of Grassland Resources, Ministry of Education of China, Hohhot, Inner Mongolia 010019, China;
2. College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010019, China

Received:2025-11-07 Revised:2026-02-26 Published:2026-07-02

摘要/Abstract

摘要： 为探讨不同放牧强度对短花针茅（Stipa breviflora）荒漠草原土壤酶活性的影响及其因素，本研究基于短花针茅荒漠草原，设置不放牧（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）4个梯度，分析了不同放牧强度对β-D-纤维素酶、β-1，4-N-乙酰氨基葡萄糖苷酶和碱性磷酸酶活性的影响，并结合物种丰富度、地上净初级生产力及土壤pH值、饱和含水量、容重、有机碳、速效氮、速效磷等因子。结果表明：随放牧强度增加，三种土壤酶活性、物种丰富度、地上净初级生产力、土壤有机碳、速效氮及速效磷均显著降低（P<0.05），容重则显著上升（P<0.05）。随机森林模型显示，速效氮与速效磷是调控土壤酶活性的主要驱动因子。放牧主要通过降低速效养分含量抑制土壤酶活性。本研究为荒漠草原保护与生态恢复提供了理论依据，草地管理利用中可采取控制载畜率、季节性休牧等措施。

关键词: 放牧强度, 荒漠草原, 土壤酶活性, 物种丰富度

Abstract: To investigate the effects of different grazing intensities on soil enzyme activities in a Stipa breviflora desert steppe and the driving factors， this study was based on a Stipa breviflora desert steppe and established four grazing intensity levels： no grazing （CK）， light grazing （LG）， moderate grazing （MG）， and heavy grazing （HG）. The effects of different grazing intensities on the activities of β-D-cellobiohydrolase， β-1，4-N-acetylglucosaminidase， and alkaline phosphatase were analyzed， along with species richness， aboveground net primary productivity （ANPP）， and soil pH， saturated water content， bulk density， organic carbon， available nitrogen， and available phosphorus. The results showed that with the increase of grazing intensity， the three soil enzyme activities， species richness， aboveground net primary productivity， soil organic carbon， available nitrogen， and available phosphorus all significantly decreased （P<0.05）， whereas soil bulk density was significantly increased. The Random Forest model indicated that available nitrogen and available phosphorus were the primary drivers regulating soil enzyme activities. Grazing suppresses soil enzyme activities primarily by decreasing available nutrients. This study provides a theoretical basis for the conservation and ecological restoration of desert steppes. In grassland management and utilization， measures such as controlling stocking rates and implementing seasonal grazing exclusion can be adopted.

Key words: Grazing intensity, Desert steppe, Soil enzyme activities, Species richness

中图分类号:

S812.2

薛逸凡, 王宁斌, 李邵宇, 樊佳悦, 吕金岭, 茶俊香, 孙海淋, 张峰, 张彬, 赵萌莉. 不同放牧强度对短花针茅荒漠草原土壤酶活性的影响及其驱动因素[J]. 草地学报, 2026, 34(7): 2615-2623.

XUE Yi-fan, WANG Ning-bin, LI Shao-yu, FAN Jia-yue, Lü Jin-ling, CHA Jun-xiang, SUN Hai-lin, ZHANG Feng, ZHANG Bin, ZHAO Meng-li. Effects of Different Grazing Intensities on Soil Enzyme Activities and Driving Factors in Stipa breviflora Desert Steppe[J]. Acta Agrestia Sinica, 2026, 34(7): 2615-2623.

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不同放牧强度对短花针茅荒漠草原土壤酶活性的影响及其驱动因素

Effects of Different Grazing Intensities on Soil Enzyme Activities and Driving Factors in Stipa breviflora Desert Steppe

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