ZhanYangLiuEtAl2021

Référence

Zhan, W., Yang, Z., Liu, J., Chen, H., Yang, G., Zhu, E., Hu, J., Jiang, L., Liu, L., Zhu, D., He, Y., Zhao, C., Xue, D., Peng, C. (2021) Effect of grazing intensities on soil n2 o emissions from an alpine meadow of zoige plateau in China. Atmosphere, 12(5). (Scopus )

Résumé

The alpine meadow of Zoige Plateau plays a key role in local livestock production of cattle and sheep. However, it remains unclear how animal grazing or its intensity affect nitrous oxide (N2 O) emissions, and the main driving factors. A grazing experiment including four grazing intensities (G0, G0.7, G1.2, G1.6 yak ha−1 ) was conducted between January 2013 and December 2014 to evaluate the soil nitrous oxide (N2 O) fluxes under different grazing intensities in an alpine meadow on the eastern Qinghai–Tibet Plateau of China. The N2 O fluxes were examined with gas collected by the static chamber method and by chromatographic concentration analysis. N2 O emissions in the growing seasons (from May to September) were lower than that in non-growing seasons (from October to April) in 2013, 1.94 ± 0.30 to 3.37 ± 0.56 kg N2 O ha−1 yr−1 . Annual mean N2 O emission rates were calculated as 1.17 ± 0.50 kg N2 O ha−1 yr−1 in non-grazing land (G0) and 1.94 ± 0.23 kg N2 O ha−1 yr−1 in the grazing land (G0.7, G1.2, and G1.6). The annual mean N2 O flux showed no significant differences between grazing treatments in 2013. However, there were significantly greater fluxes from the G0.7 treatment than from the G1.6 treatment in 2014, especially in the growing season. Over the two years, the soil N2 O emission rate was significantly negatively correlated with soil water-filled pore space (WFPS) and dissolved organic carbon (DOC) content as well as positively correlated with soil available phosphorus (P). No relationship was observed between soil N2 O emission rate and temperature or rainfall. Our results showed that the meadow soils acted as a source of N2 O for most periods and turned into a weak sink of N2 O later during the sampling period. Our results highlight the importance of proper grazing intensity in reducing N2 O emissions from alpine meadow. The interaction between grazing intensity and N2 O emissions should be of more concern during future management of pastures in Zoige Plateau. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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@ARTICLE { ZhanYangLiuEtAl2021,
    AUTHOR = { Zhan, W. and Yang, Z. and Liu, J. and Chen, H. and Yang, G. and Zhu, E. and Hu, J. and Jiang, L. and Liu, L. and Zhu, D. and He, Y. and Zhao, C. and Xue, D. and Peng, C. },
    JOURNAL = { Atmosphere },
    TITLE = { Effect of grazing intensities on soil n2 o emissions from an alpine meadow of zoige plateau in China },
    YEAR = { 2021 },
    NOTE = { cited By 0 },
    NUMBER = { 5 },
    VOLUME = { 12 },
    ABSTRACT = { The alpine meadow of Zoige Plateau plays a key role in local livestock production of cattle and sheep. However, it remains unclear how animal grazing or its intensity affect nitrous oxide (N2 O) emissions, and the main driving factors. A grazing experiment including four grazing intensities (G0, G0.7, G1.2, G1.6 yak ha−1 ) was conducted between January 2013 and December 2014 to evaluate the soil nitrous oxide (N2 O) fluxes under different grazing intensities in an alpine meadow on the eastern Qinghai–Tibet Plateau of China. The N2 O fluxes were examined with gas collected by the static chamber method and by chromatographic concentration analysis. N2 O emissions in the growing seasons (from May to September) were lower than that in non-growing seasons (from October to April) in 2013, 1.94 ± 0.30 to 3.37 ± 0.56 kg N2 O ha−1 yr−1 . Annual mean N2 O emission rates were calculated as 1.17 ± 0.50 kg N2 O ha−1 yr−1 in non-grazing land (G0) and 1.94 ± 0.23 kg N2 O ha−1 yr−1 in the grazing land (G0.7, G1.2, and G1.6). The annual mean N2 O flux showed no significant differences between grazing treatments in 2013. However, there were significantly greater fluxes from the G0.7 treatment than from the G1.6 treatment in 2014, especially in the growing season. Over the two years, the soil N2 O emission rate was significantly negatively correlated with soil water-filled pore space (WFPS) and dissolved organic carbon (DOC) content as well as positively correlated with soil available phosphorus (P). No relationship was observed between soil N2 O emission rate and temperature or rainfall. Our results showed that the meadow soils acted as a source of N2 O for most periods and turned into a weak sink of N2 O later during the sampling period. Our results highlight the importance of proper grazing intensity in reducing N2 O emissions from alpine meadow. The interaction between grazing intensity and N2 O emissions should be of more concern during future management of pastures in Zoige Plateau. © 2021 by the authors. Licensee MDPI, Basel, Switzerland. },
    AFFILIATION = { Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation, Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Zoige Peatland and Global Change Research Station, Chinese Academy of Sciences, Hongyuan, 624400, China; Key Laboratory of Southwest China Wildlife Resources Conservation, China West Normal University, Ministry of Education, Nanchong, 637009, China; College of Life Science, China West Normal University, Nanchong, 637000, China; School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, College of Forestry, Northwest A&F University, Yangling, 712100, China; Institute of Environment Sciences, Department of Biology Science, University of Quebec at Montreal, Montreal, QC C3H 3P8, Canada },
    ART_NUMBER = { 541 },
    AUTHOR_KEYWORDS = { Grassland; Greenhouse gases; Nitrogen cycling; Qinghai–Tibet Plateau },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.3390/atmos12050541 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85105700731&doi=10.3390%2fatmos12050541&partnerID=40&md5=95a1f4154fad516e039f9fcf9bbea977 },
}

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