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Different grassland managements significantly change carbon fluxes in an alpine meadow

Alpine meadow plays vital roles in regional animal husbandry and the ecological environment. However, different grassland managements affect the structure and function of the alpine meadow. In this study, we selected three typical grassland managements including free grazing, enclosure, and artifici...

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Autores principales: Xu, Ganjun, Kang, Xiaoming, Li, Wei, Li, Yong, Chai, Yongyu, Wu, Shengyi, Zhang, Xiaodong, Yan, Zhongqing, Kang, Enze, Yang, Ao, Niu, Yuechuan, Wang, Xiaodong, Yan, Liang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9606693/
https://www.ncbi.nlm.nih.gov/pubmed/36311073
http://dx.doi.org/10.3389/fpls.2022.1000558
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author Xu, Ganjun
Kang, Xiaoming
Li, Wei
Li, Yong
Chai, Yongyu
Wu, Shengyi
Zhang, Xiaodong
Yan, Zhongqing
Kang, Enze
Yang, Ao
Niu, Yuechuan
Wang, Xiaodong
Yan, Liang
author_facet Xu, Ganjun
Kang, Xiaoming
Li, Wei
Li, Yong
Chai, Yongyu
Wu, Shengyi
Zhang, Xiaodong
Yan, Zhongqing
Kang, Enze
Yang, Ao
Niu, Yuechuan
Wang, Xiaodong
Yan, Liang
author_sort Xu, Ganjun
collection PubMed
description Alpine meadow plays vital roles in regional animal husbandry and the ecological environment. However, different grassland managements affect the structure and function of the alpine meadow. In this study, we selected three typical grassland managements including free grazing, enclosure, and artificial grass planting and conducted a field survey to study the effects of grassland managements on carbon fluxes in an alpine meadow. The carbon fluxes were observed by static chamber and environmental factors including vegetation and soil characteristics were measured simultaneously. Our results show that the alpine meadow was a CO(2) and CH(4) sink, and grassland managements had a significant effect on all CO(2) fluxes, including gross ecosystem production (GEP, P< 0.001), net ecosystem production (NEP, P< 0.001) and ecosystem respiration (ER, P< 0.001) but had no significant effect on CH(4) fluxes (P > 0.05). The ranking of GEP under the different grassland managements was enclosure > free grazing > artificial grass planting. Furthermore, NEP and ER at enclosure plots were significantly higher than those of the free grazing and artificial grass planting plots. In addition, different grassland managements also affected the vegetation and soil characteristics of the alpine meadow. The aboveground biomass of artificial grass planting was significantly higher than that of the free grazing and enclosure plots. The vegetation coverage under three different grassland managements was ranked in the order of enclosure > artificial grass planting > free grazing and significant differences were observed among them. Moreover, significant differences in the number of species (P< 0.01) and the Margalef richness index (P< 0.05) were detected under three different grassland managements. Further analysis of the relationship between environmental factors and carbon fluxes revealed that GEP and NEP of the alpine meadow were positively correlated with vegetation coverage, the number of species, and the Margalef richness index. Therefore, grassland restoration should be configured with multiple species, which could improve carbon sink capacity while considering the functions of grassland restoration and production.
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spelling pubmed-96066932022-10-28 Different grassland managements significantly change carbon fluxes in an alpine meadow Xu, Ganjun Kang, Xiaoming Li, Wei Li, Yong Chai, Yongyu Wu, Shengyi Zhang, Xiaodong Yan, Zhongqing Kang, Enze Yang, Ao Niu, Yuechuan Wang, Xiaodong Yan, Liang Front Plant Sci Plant Science Alpine meadow plays vital roles in regional animal husbandry and the ecological environment. However, different grassland managements affect the structure and function of the alpine meadow. In this study, we selected three typical grassland managements including free grazing, enclosure, and artificial grass planting and conducted a field survey to study the effects of grassland managements on carbon fluxes in an alpine meadow. The carbon fluxes were observed by static chamber and environmental factors including vegetation and soil characteristics were measured simultaneously. Our results show that the alpine meadow was a CO(2) and CH(4) sink, and grassland managements had a significant effect on all CO(2) fluxes, including gross ecosystem production (GEP, P< 0.001), net ecosystem production (NEP, P< 0.001) and ecosystem respiration (ER, P< 0.001) but had no significant effect on CH(4) fluxes (P > 0.05). The ranking of GEP under the different grassland managements was enclosure > free grazing > artificial grass planting. Furthermore, NEP and ER at enclosure plots were significantly higher than those of the free grazing and artificial grass planting plots. In addition, different grassland managements also affected the vegetation and soil characteristics of the alpine meadow. The aboveground biomass of artificial grass planting was significantly higher than that of the free grazing and enclosure plots. The vegetation coverage under three different grassland managements was ranked in the order of enclosure > artificial grass planting > free grazing and significant differences were observed among them. Moreover, significant differences in the number of species (P< 0.01) and the Margalef richness index (P< 0.05) were detected under three different grassland managements. Further analysis of the relationship between environmental factors and carbon fluxes revealed that GEP and NEP of the alpine meadow were positively correlated with vegetation coverage, the number of species, and the Margalef richness index. Therefore, grassland restoration should be configured with multiple species, which could improve carbon sink capacity while considering the functions of grassland restoration and production. Frontiers Media S.A. 2022-10-13 /pmc/articles/PMC9606693/ /pubmed/36311073 http://dx.doi.org/10.3389/fpls.2022.1000558 Text en Copyright © 2022 Xu, Kang, Li, Li, Chai, Wu, Zhang, Yan, Kang, Yang, Niu, Wang and Yan https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Xu, Ganjun
Kang, Xiaoming
Li, Wei
Li, Yong
Chai, Yongyu
Wu, Shengyi
Zhang, Xiaodong
Yan, Zhongqing
Kang, Enze
Yang, Ao
Niu, Yuechuan
Wang, Xiaodong
Yan, Liang
Different grassland managements significantly change carbon fluxes in an alpine meadow
title Different grassland managements significantly change carbon fluxes in an alpine meadow
title_full Different grassland managements significantly change carbon fluxes in an alpine meadow
title_fullStr Different grassland managements significantly change carbon fluxes in an alpine meadow
title_full_unstemmed Different grassland managements significantly change carbon fluxes in an alpine meadow
title_short Different grassland managements significantly change carbon fluxes in an alpine meadow
title_sort different grassland managements significantly change carbon fluxes in an alpine meadow
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9606693/
https://www.ncbi.nlm.nih.gov/pubmed/36311073
http://dx.doi.org/10.3389/fpls.2022.1000558
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