放牧强度对短花针茅根系形态影响的研究

doi:10.11733/j.issn.1007-0435.2025.12.014

草地学报 ›› 2025, Vol. 33 ›› Issue (12): 4015-4022.DOI: 10.11733/j.issn.1007-0435.2025.12.014

• 研究论文 • 上一篇

放牧强度对短花针茅根系形态影响的研究

王宁斌¹, 乔荠瑢², 李邵宇², 郑佳华², 张峰², 张彬², 徐龙超², 周清格², 陈信力⁴, 赵萌莉², 季祥^1,3

1. 内蒙古农业大学生命科学学院, 内蒙古呼和浩特 010010;
2. 内蒙古农业大学草业学院, 内蒙古呼和浩特 010010;
3. 赤峰学院, 内蒙古赤峰 024000;
4. 浙江农林大学环境与资源学院, 浙江杭州 311300

收稿日期:2025-03-03 修回日期:2025-05-27 发布日期:2025-12-01
通讯作者: 赵萌莉，E-mail：nmgmlzh@126.com；季祥，E-mail：jixiang@imau.edu.cn
作者简介:王宁斌（1998-），男，汉族，江西赣州人，硕士研究生，主要从事草地生态学研究，E-mail：1512914631@qq.com；
基金资助:
国家重点研发计划（2024YFF1309000）和国家重点研发计划（2023YFF1304104）资助

Effects of Grazing Intensity on Root Morphology of Stipa breviflora

WANG Ning-bin¹, QIAO Ji-rong², LI Shao-yu², ZHENG Jia-hua², ZHANG Feng², ZHANG Bin², XU Long-chao², ZHOU Qing-ge², CHEN Xin-li⁴, ZHAO Meng-li², JI Xiang^1,3

1. College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010010, China;
2. College of Grassland Science, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010010, China;
3. Chifeng University, Chifeng, Inner Mongolia 01500, China;
4. College of Environment and Resources, Zhejiang A&F University, Hangzhou, Zhejiang Province 311300, China

Received:2025-03-03 Revised:2025-05-27 Published:2025-12-01

摘要/Abstract

摘要： 植物根系在土壤与地上部分之间起着关键连接作用，且根系会改变其形态响应放牧干扰，从而优化资源获取效率。为探究荒漠草原建群种短花针茅（Stipa breviflora）根系形态对放牧干扰的适应性及其影响因素，本研究依托内蒙古四子王旗荒漠草原长期放牧试验平台，研究了不同放牧强度[对照（CK）、轻度放牧（LG）、中度放牧（MG）和重度放牧（HG）]对短花针茅根系生物量、总根长、平均直径和总表面积的影响。结果表明：与CK相比，LG和MG处理显著提高了短花针茅根系生物量、总根长和总表面积，而HG处理显著降低了这些指标；所有放牧处理均显著降低了根系平均直径。冗余分析表明，土壤硝态氮含量是影响根系形态的关键环境因子。本研究表明，适度放牧有助于短花针茅根系生长，而过度放牧则产生抑制作用，这为荒漠草原的可持续管理和生态保护提供了科学依据。

关键词: 荒漠草原, 放牧强度, 建群植物, 根系形态

Abstract: Plant root systems serve as a critical link between soil and aboveground components， modifying their morphology in response to grazing disturbances to optimize resource acquisition efficiency. To investigate the adaptive responses of root morphology to grazing and its influencing factors in Stipa breviflora （a dominant species of desert steppe）， this study utilized a long-term grazing experimental platform in the desert steppe of Siziwang Banner， Inner Mongolia. We examined the effects of different grazing intensities [control （CK）， light grazing （LG）， moderate grazing （MG）， and heavy grazing （HG）] on root biomass， total root length， average diameter， and total surface area of S. breviflora. Results showed that compared with CK， LG and MG treatments significantly increased root biomass， total root length， and total surface area， whereas HG treatment markedly reduced these parameters. All grazing treatments significantly decreased the average root diameter. Redundancy analysis identified soil nitrate nitrogen content as a key environmental factor influencing root morphology. This study demonstrates that moderate grazing enhances S. breviflora root growth， while overgrazing exerts inhibitory effects， providing scientific insights for sustainable management and ecological conservation in desert steppes.

Key words: Desert steppe, Grazing intensity, Dominant plants, Root morphology

中图分类号:

S812.6

王宁斌, 乔荠瑢, 李邵宇, 郑佳华, 张峰, 张彬, 徐龙超, 周清格, 陈信力, 赵萌莉, 季祥. 放牧强度对短花针茅根系形态影响的研究[J]. 草地学报, 2025, 33(12): 4015-4022.

WANG Ning-bin, QIAO Ji-rong, LI Shao-yu, ZHENG Jia-hua, ZHANG Feng, ZHANG Bin, XU Long-chao, ZHOU Qing-ge, CHEN Xin-li, ZHAO Meng-li, JI Xiang. Effects of Grazing Intensity on Root Morphology of Stipa breviflora[J]. Acta Agrestia Sinica, 2025, 33(12): 4015-4022.

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放牧强度对短花针茅根系形态影响的研究

Effects of Grazing Intensity on Root Morphology of Stipa breviflora

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