Appraisal of different land use systems for heterotrophic respiration in a Karst landscape
文献类型:期刊论文
作者 | Bing Ren; Ping Chen; Muhammad Shaaban; Xiran Yang; Yuxing Chen; Zhengyou Zhang; Bin Chen; Tao Peng; Avelino Núñez-Delgado |
刊名 | Environmental Research |
出版日期 | 2022 |
卷号 | 212页码:113480 |
关键词 | Karst Landscape Heterotrophic Respiration Land Use Systems Climatic Variables |
DOI | 10.1016/j.envres.2022.113480 |
英文摘要 | Soil respiration, particularly heterotrophic respiration (RH), is a potent source of carbon dioxide (CO2) in the atmosphere. The current research focuses on the evaluation of RH for six land use systems including sloping cropland (SC), shrub land (SD), grassland (GD), shrub & grassland (SGD), newly abandoned cropland (NC) and afforested forest (AF). Heterotrophic respiration showed a diverse seasonal pattern over a year long period that was affected by various soil properties and climatic variables across the six land use systems in a subtropical Karst landscape. The lowest RH scores were found in the SD site (annual cumulative soil CO2 flux: 2447 kg C ha−1), whereas the maximum heterotrophic respiration occurred in the SF site (annual cumulative soil CO2 13597 kg C ha−1). The values of RH were: SC site: 3.8–191.5 mg C m−2 h−1, NC site: 1.04–129 mg C m−2 h−1, GD site: 3.6–100.7 mg C m−2 h−1, SGD site: 0.3–393.5 mg C m−2 h−1, SD site: 3–116 mg C m−2 h−1, and SF site: 10.6–398.2 mg C m−2 h−1. Highly significant (p ≤ 0.01) and positive correlations between RH rate and soil temperature were found for the studied land use types (correlation coefficients as follows; SC: 0.77, NC: 0.61, GD: 0.283, SGD: 0.535, SD: 0.230, SF: 0.85). However, water filled pore space (WFPS), NH4+, NO3−, dissolved organic carbon (DOC) and total dissolved nitrogen (TDN) concentrations showed varied (positive and negative) correlations with RH. The overall results show that soil temperature can be considered as the most limiting factor for RH among all the sites studied in the present research. In these environments, soil heterotrophic respiration significantly correlated with soil temperature, highlighting the significance of climate on heterotrophic respiration. |
URL标识 | 查看原文 |
语种 | 英语 |
源URL | [http://ir.gyig.ac.cn/handle/42920512-1/13607] |
专题 | 地球化学研究所_环境地球化学国家重点实验室 |
作者单位 | 1.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, 610041, Chengdu, China 2.Guizhou Institute of Environmental Science Research and Design, 550008, Guiyang, China 3.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550081, Guiyang, China 4.Puding Karst Ecosystem Research Station, Chinese Academy of Sciences, 562100, Puding, China 5.Exploration and Development Research Institute of Southwest Oil & Gas Field Company, Petro-China, 610000, Chengdu, China 6.Agricultural and Rural Bureau of Hejiang County, 646200, Hejiang, China 7.Dept. Soil Science and Agricultural Chemistry, University of Santiago de Compostela, Engineering Polytechnic School, Campus Univ. s/n, 27002, Lugo, Spain |
推荐引用方式 GB/T 7714 | Bing Ren,Ping Chen,Muhammad Shaaban,et al. Appraisal of different land use systems for heterotrophic respiration in a Karst landscape[J]. Environmental Research,2022,212:113480. |
APA | Bing Ren.,Ping Chen.,Muhammad Shaaban.,Xiran Yang.,Yuxing Chen.,...&Avelino Núñez-Delgado.(2022).Appraisal of different land use systems for heterotrophic respiration in a Karst landscape.Environmental Research,212,113480. |
MLA | Bing Ren,et al."Appraisal of different land use systems for heterotrophic respiration in a Karst landscape".Environmental Research 212(2022):113480. |
入库方式: OAI收割
来源:地球化学研究所
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