WuPengLiuEtAl2021

Référence

Wu, F., Peng, C., Liu, W., Liu, Z., Wang, H., Chen, D., Li, Y. (2021) Effects of nitrogen additions on soil respiration in an asian tropical montane rainforest. Forests, 12(6). (Scopus )

Résumé

Understanding the impacts of nitrogen (N) addition on soil respiration (RS) and its temperature sensitivity (Q10 ) in tropical forests is very important for the global carbon cycle in a changing environment. Here, we investigated how RS respond to N addition in a tropical montane rainforest in Southern China. Four levels of N treatments (0, 25, 50, and 100 kg N ha−1 a−1 as control (CK), low N (N25), moderate N (N50), and high N (N100), respectively) were established in September 2010. Based on a static chamber-gas chromatography method, RS was measured from January 2015 to December 2018. RS exhibited significant seasonal variability, with low RS rates appeared in the dry season and high rates appeared in the wet season regardless of treatment. RS was significantly related to the measured soil temperature and moisture. Our results showed that soil RS increased after N additions, the mean annual RS was 7% higher in N25 plots, 8% higher in N50 plots, and 11% higher in N100 plots than that in the CK plots. However, the overall impacts of N additions on RS were statistically insignificant. For the entire study period, the CK, N25, N50, and N100 treatments yielded Q10 values of 2.27, 3.45, 4.11, and 2.94, respectively. N addition increased the temperature sensitivity (Q10 ) of RS . Our results suggest that increasing atmospheric N deposition may have a large impact on the stimulation of soil CO2 emissions from tropical rainforests in China. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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@ARTICLE { WuPengLiuEtAl2021,
    AUTHOR = { Wu, F. and Peng, C. and Liu, W. and Liu, Z. and Wang, H. and Chen, D. and Li, Y. },
    JOURNAL = { Forests },
    TITLE = { Effects of nitrogen additions on soil respiration in an asian tropical montane rainforest },
    YEAR = { 2021 },
    NOTE = { cited By 0 },
    NUMBER = { 6 },
    VOLUME = { 12 },
    ABSTRACT = { Understanding the impacts of nitrogen (N) addition on soil respiration (RS) and its temperature sensitivity (Q10 ) in tropical forests is very important for the global carbon cycle in a changing environment. Here, we investigated how RS respond to N addition in a tropical montane rainforest in Southern China. Four levels of N treatments (0, 25, 50, and 100 kg N ha−1 a−1 as control (CK), low N (N25), moderate N (N50), and high N (N100), respectively) were established in September 2010. Based on a static chamber-gas chromatography method, RS was measured from January 2015 to December 2018. RS exhibited significant seasonal variability, with low RS rates appeared in the dry season and high rates appeared in the wet season regardless of treatment. RS was significantly related to the measured soil temperature and moisture. Our results showed that soil RS increased after N additions, the mean annual RS was 7% higher in N25 plots, 8% higher in N50 plots, and 11% higher in N100 plots than that in the CK plots. However, the overall impacts of N additions on RS were statistically insignificant. For the entire study period, the CK, N25, N50, and N100 treatments yielded Q10 values of 2.27, 3.45, 4.11, and 2.94, respectively. N addition increased the temperature sensitivity (Q10 ) of RS . Our results suggest that increasing atmospheric N deposition may have a large impact on the stimulation of soil CO2 emissions from tropical rainforests in China. © 2021 by the authors. Licensee MDPI, Basel, Switzerland. },
    AFFILIATION = { Center for Ecological Forecasting and Global Change, College of Forestry, Northwest A&F University, Yangling712100, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling712100, China; Department of Biology Sciences, Institute of Environment Sciences, University of Quebec at Montreal, C.P. 8888, Succ. Centre-Ville, Montreal, QC H3C 3P8, Canada; Jianfengling National Key Field Observation and Research Station for Forest Ecosystem, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China },
    ART_NUMBER = { 802 },
    AUTHOR_KEYWORDS = { Nitrogen addition; Soil respiration; Temperature sensitivity; Tropical forest },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.3390/f12060802 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85108876381&doi=10.3390%2ff12060802&partnerID=40&md5=6860db939fd2d703e1eeba7032e6e49e },
}

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