Temperature responsiveness of soil carbon fractions, microbes, extracellular enzymes and CO 2 emission: mitigating role of texture

PeerJ

article

Waseem Hassan¹  Yu’e Li²  Tahseen Saba³  Jianshuang Wu²  Safdar Bashir⁴  Saqib Bashir⁴  Mansour K. Gatasheh⁵  Zeng-Hui Diao⁶  Zhongbing Chen⁷ 

[1] Landwirtschaftlich-Gärtnerischen, Humboldt-Universität zu Berlin;Institute of Environment and Sustainable Development in Agriculture/Laboratory for Agricultural Environment, Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences;College of Forestry, Sichuan Agricultural University;Department of Soil and Environmental Sciences, Ghazi University;Department of Biochemistry, College of Science, King Saud University;School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering;Department of Applied Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences

关键词: Soil C fractions;    Soil microbes and biomass;    Extracellular enzymes;    CO2 fluxes;    Temperature sensitivity;    Texture;   

DOI  :  10.7717/peerj.13151

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

The interaction of warming and soil texture on responsiveness of the key soil processes i.e. organic carbon (C) fractions, soil microbes, extracellular enzymes and CO2 emissions remains largely unknown. Global warming raises the relevant question of how different soil processes will respond in near future, and what will be the likely regulatory role of texture? To bridge this gap, this work applied the laboratory incubation method to investigate the effects of temperature changes (10–50 °C) on dynamics of labile, recalcitrant and stable C fractions, soil microbes, microbial biomass, activities of extracellular enzymes and CO2 microbial biomass N (MBP). Conversely, the temperature effect and sensitivity of all key soil processes including CO2 emissions were significantly (P < 0.05) higher in sandy than clayey textured soil. Results confirmed that under the scenario of global warming and climate change, soils which are sandy in nature are more susceptible to temperature increase and prone to become the CO2-C sources. It was revealed that clayey texture played an important role in mitigating and easing off the undue temperature influence, hence, the sensitivity of key soil processes.

【 授权许可】

CC BY