氮磷添加与AMF对宁夏荒漠草原优势植物生物量和C∶N∶P的影响

doi:10.11733/j.issn.1007-0435.2026.02.028

草地学报 ›› 2026, Vol. 34 ›› Issue (2): 663-669.DOI: 10.11733/j.issn.1007-0435.2026.02.028

• 研究论文 • 上一篇

氮磷添加与AMF对宁夏荒漠草原优势植物生物量和C∶N∶P的影响

何嘉¹, 王圣泽¹, 赵康¹, 王红¹, 候文慧¹, 沈月^1,2, 杨鑫^1,2

1. 宁夏大学林业与草业学院, 宁夏银川 750021;
2. 宁夏草牧业工程技术研究中心, 宁夏银川 750021

收稿日期:2025-03-19 修回日期:2025-04-14 发布日期:2026-01-22
通讯作者: 杨鑫，E-mail:yangxin@nxu.edu.cn
作者简介:何嘉（2004-），女，汉族，甘肃白银人，本科生，主要从事草地管理与生态方面的研究，E-mail:hj19109439059@163.com；
基金资助:
国家自然科学基金（32460354）；宁夏自然科学基金项目（2023AAC05012，2023AAC03044）；中国科学院“西部之光”青年学者项目（XAB2022YW15）；宁夏回族自治区一流学科（草学）建设项目（NXYLXK2017A01）资助

Effects of Nitrogen and Phosphorus Addition and Arbuscular Mycorrhizal Fungi on the Biomasses and C∶N∶P Ratios of Dominant Plants in Desert Steppe in Ningxia

HE Jia¹, WANG Sheng-ze¹, ZHAO Kang¹, WANG Hong¹, HOU Wen-hui¹, SHEN Yue^1,2, YANG Xin^1,2

1. College of Forestry and Prataculture, Ningxia University, Yinchuan, Ningxia 750021, China;
2. Ningxia Grassland and Animal Husbandry Engineering Technology Research Center, Yinchuan, Ningxia 750021, China

Received:2025-03-19 Revised:2025-04-14 Published:2026-01-22

摘要/Abstract

摘要： 氮磷添加是缓解温性荒漠草原生产力养分限制，提高草原生产力的重要措施之一。土壤氮磷养分富集潜在改变植物与丛枝菌根真菌（Arbuscular mycorrhizal fungi，AMF）的共生关系。本研究开展三因素原位控制试验，采用AMF抑菌剂添加调控AMF活性，分析氮磷添加与AMF的独立及交互效应对宁夏荒漠草原沙芦草（Agropyron mongolicum）与草木樨状黄芪（Astragalus melilotoides）生物量与C∶N∶P的影响。结果表明：氮磷添加显著增加沙芦草与草木樨状黄芪地上生物量。对照处理下，AMF对芦草与草木樨状黄芪地上生物量无显著影响；单独加磷与氮磷添加处理下，AMF显著抑制沙芦草地上生物量。AMF提高沙芦草植株C∶N与草木樨状黄芪C∶P。磷添加显著降低沙芦草与草木樨状黄芪C∶P与N∶P，缓解了沙芦草的磷限制。综上所述，与AMF相比，氮磷添加更利于宁夏荒漠草原优势植物生物量累积，缓解沙芦草与草木樨状黄芪的养分限制。

关键词: 沙芦草, 草木樨状黄芪, 生态化学计量比, 养分含量, 磷限制

Abstract: Nitrogen （N） and phosphorus （P） additions are vital management methods to alleviate plant nutrient limitation and improve grassland productivity. Soil nutrient enrichment may potentially alter the symbiotic relationships between plants and arbuscular mycorrhizal fungi （AMF）. This study conducted a three-factor experiment to study the independent and interactive effects of N and P additions and AMF on the biomass and C∶N∶P of Agropyron mongolicum and Astragalus melilotoides in the desert steppe in Ningxia. We used a kind of fungicide（benomyl）to regulate native AMF activities. Our results showed that N and P additions significantly increased the aboveground biomass of A. mongolicum and A. melilotoides， but AMF did not alter them. AMF significantly reduced the aboveground biomass of A. mongolicum under P alone addition and both N and P addition treatments. AMF increased the C∶N of A. mongolicum plants and the C∶P of A. melilotoides. P addition significantly reduced the C∶P and N∶P of two plants， and alleviated the P limitation of A. mongolicum. In summary， compared with AMF， N and P addition was more beneficial to dominant plants biomass in the desert steppe in Ningxia， and could alleviate the nutrient limitation of A. mongolicum and A. melilotoides.

Key words: Agropyron mongolicum, Astragalus melilotoides, Ecological stoichiometric ratio, Nutrient content, Phosphorus limitation

何嘉, 王圣泽, 赵康, 王红, 候文慧, 沈月, 杨鑫. 氮磷添加与AMF对宁夏荒漠草原优势植物生物量和C∶N∶P的影响[J]. 草地学报, 2026, 34(2): 663-669.

HE Jia, WANG Sheng-ze, ZHAO Kang, WANG Hong, HOU Wen-hui, SHEN Yue, YANG Xin. Effects of Nitrogen and Phosphorus Addition and Arbuscular Mycorrhizal Fungi on the Biomasses and C∶N∶P Ratios of Dominant Plants in Desert Steppe in Ningxia[J]. Acta Agrestia Sinica, 2026, 34(2): 663-669.

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氮磷添加与AMF对宁夏荒漠草原优势植物生物量和C∶N∶P的影响

Effects of Nitrogen and Phosphorus Addition and Arbuscular Mycorrhizal Fungi on the Biomasses and C∶N∶P Ratios of Dominant Plants in Desert Steppe in Ningxia

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