Effects of Multi-gradient Nitrogen and Phosphorus Additions on Biomass and Nitrogen and Phosphorus Content of Alpine Meadow Plant Community

doi:10.11733/j.issn.1007-0435.2023.03.015

Acta Agrestia Sinica ›› 2023, Vol. 31 ›› Issue (3): 751-759.DOI: 10.11733/j.issn.1007-0435.2023.03.015

Effects of Multi-gradient Nitrogen and Phosphorus Additions on Biomass and Nitrogen and Phosphorus Content of Alpine Meadow Plant Community

LIU Yan^1,2, CHEN Meng-jiao^1,2, GUO Tong-tong^1,2, CUI Jing^1,2, LI Lan-ping^1,3, LIANG De-fei^1,3, LI Yong-hui^1,2, ZHANG Zhen-hua⁴, ZHU Xiao-xue⁵, REN Fei^1,3

1. State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai Province 810016, China;
2. College of Eco-Environmental Engineering, Qinghai University, Xining, Qinghai Province 810016, China;
3. Sanjiangyuan Grassland Ecosystem National Observation and Research Station, Xining, Qinghai Province 810016, China;
4. Key Laboratory of Adaptati on and Evolutionof Plateau Biota, Qinghai Haibei National Field Research Station of Alpine Grassland Ecosystem, Northwest Institute of Plateau Biology, Chinese Academy of Science, Xining, Qinghai Province 810008, China;
5. College of Biological Resource and Food Engineering, Center for Yunnan Plateau Biological Resources Protection and Utilization, Qujing Normal University, Qujing, Yunnan Province 655011, China

Received:2022-09-17 Revised:2022-11-07 Online:2023-03-15 Published:2023-04-01

多梯度氮磷添加对高寒草甸植物群落生物量与氮磷含量的影响

刘艳^1,2, 陈梦娇^1,2, 郭童童^1,2, 崔靖^1,2, 李兰平^1,3, 梁德飞^1,3, 李永慧^1,2, 张振华⁴, 朱小雪⁵, 任飞^1,3

1. 省部共建三江源生态与高原农牧业国家重点实验室, 青海西宁 810016;
2. 青海大学生态环境工程学院, 青海西宁 810016;
3. 青海三江源草地生态系统国家野外科学观测研究站, 青海西宁 810016;
4. 中国科学院西北高原生物研究所适应与进化重点实验室, 青海海北高寒草地生态系统国家野外科学观测研究站, 青海西宁 810008;
5. 曲靖师范学院生物资源与食品工程学院, 云南高原生物资源保护与利用研究中心, 云南曲靖 655011

通讯作者: 任飞,E-mail:fei_ren2016@163.com
作者简介:刘艳(1995-),女,汉族,硕士研究生,主要从事草地生态学研究,E-mail:liuyan_2022089@163.com
基金资助:
国家自然科学基金（31901171，31960339）；青海大学省部共建三江源生态和高原农牧业国家重点实验室开放研究项目（2019-KF-001，2022-KF-10）；云南省基础研究计划项目-青年项目（2019FD105）；青海省科技厅项目（2018-ZJ-967Q）资助

Abstract

Abstract: Under the background of global climate and environmental change, to explore the effects of different gradients of nitrogen and phosphorus additions on plant community biomass, plant nutrient content and stoichiometric ratio of alpine meadow, this paper analyzed the responses of the total aboveground biomass, the aboveground biomass of functional groups, total nitrogen and total phosphorus content, and nitrogen and phosphorus ratio of plants to the multi-gradient nitrogen and phosphorus additions of typical alpine meadow in Menyuan County, Qinghai Province. The results showed that:the additions of nitrogen and phosphorus had a significant effect on the aboveground biomass of the community (P<0.001);the nitrogen addition significant effects on the biomass of grasses and legumes (P<0.001);the phosphorus addition significant effects on the biomass of grasses and sedges (P<0.001);the interaction of nitrogen additions and phosphorus additions significant effects on aboveground biomass of legumes and sedges (P<0.05). At the community level, nitrogen addition significantly increased the total nitrogen (TN) content of the community plants, and had a positive effect on the nitrogen to phosphorus ratio (N:P) of the community plants. Phosphorus addition significantly increased the total phosphorus (TP) content of the community plants, and had a negative effect on plant N:P ratio in community. The negative effect of plant TP on N:P was greater than the positive effect of TN on plant N:P ratio. Our study demostrated that the addition of nitrogen and phosphorus may change the composition and nutrient content of alpine meadow plant community, and the community would gradually develop to grassland;In addition, the growth of alpine meadow plants tends to be restricted by both nitrogen and phosphorus.

Key words: Alpine meadow, Nitrogen and phosphorus addition, Biomass, Nutrient content, Nitrogen phosphorus ratio

摘要： 为研究不同梯度氮、磷单独及混合添加对高寒草甸植物群落生物量、植物养分含量及化学计量比的影响，本实验分析了青海省门源县典型高寒草甸植物群落地上总生物量，功能群水平地上生物量，植物全氮、全磷含量及氮磷比对多梯度氮、磷添加的响应情况。结果表明：氮、磷添加均对群落地上生物量影响极显著（P<0.001）；氮添加对禾草类和豆科生物量影响极显著（P<0.001）；磷添加对禾草类和莎草类生物量影响极显著（P<0.001）；氮磷交互作用对豆科和莎草类生物量影响显著（P<0.05）。群落水平上，氮添加显著提高了植物全氮含量，对植物氮磷比（N∶P）有正效应，磷添加显著提高了植物全磷含量，对植物N∶P有负效应，植物全磷对N∶P的负效应大于全氮对N∶P的正效应。本研究表明氮、磷添加可能会使高寒草甸植物群落组成和植物养分含量发生改变，植物群落逐渐向禾草类发展；此外，高寒草甸植物生长趋向于受氮磷共同限制。

关键词: 高寒草甸, 氮磷添加, 生物量, 养分含量, 化学计量比

CLC Number:

S181

LIU Yan, CHEN Meng-jiao, GUO Tong-tong, CUI Jing, LI Lan-ping, LIANG De-fei, LI Yong-hui, ZHANG Zhen-hua, ZHU Xiao-xue, REN Fei. Effects of Multi-gradient Nitrogen and Phosphorus Additions on Biomass and Nitrogen and Phosphorus Content of Alpine Meadow Plant Community[J]. Acta Agrestia Sinica, 2023, 31(3): 751-759.

刘艳, 陈梦娇, 郭童童, 崔靖, 李兰平, 梁德飞, 李永慧, 张振华, 朱小雪, 任飞. 多梯度氮磷添加对高寒草甸植物群落生物量与氮磷含量的影响[J]. 草地学报, 2023, 31(3): 751-759.

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Effects of Multi-gradient Nitrogen and Phosphorus Additions on Biomass and Nitrogen and Phosphorus Content of Alpine Meadow Plant Community

多梯度氮磷添加对高寒草甸植物群落生物量与氮磷含量的影响

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