Pedosphere 34(4): 759--769, 2024
ISSN 1002-0160/CN 32-1315/P
©2024 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| In-situ warming does not change soil priming effect induced by glucose addition in a temperate forest |
Xiaohan DONG1,2,3, Yunting FANG4,5,6, Dongwei LIU4,5,6,7, Xin GUAN1,3, Kai HUANG2,5,6, Yuqi LIU2,5,6, Qingkui WANG1,3, Silong WANG1,3 , Weidong ZHANG1,3 |
1 Huitong Experimental Station of Forest Ecology, CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Shenyang 110016 (China);
2 University of Chinese Academy of Sciences, Beijing 101408 (China);
3 Hunan Key Laboratory for Structure and Ecosystem Service of Subtropical Forest, Huitong National Research Station of Forest Ecosystem, Huitong 418307 (China);
4 Qingyuan Forest Chinese Ecosystem Research Network (CERN), National Observation and Research Station, Shenyang 110016 (China);
5 Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016 (China);
6 Key Laboratory of Stable Isotope Techniques and Applications, Shenyang 110016 (China);
7 Key Laboratory of Terrestrial Ecosystem Carbon Neutrality, Shenyang 110016 (China) |
| ABSTRACT |
| Priming effect (PE) on soil organic carbon (SOC) decomposition caused by the addition of organic carbon (C) is an important ecological process in regulating soil C cycle. Additionally, most priming studies are confined to laboratory trials, while the assessment of soil PE under field conditions with variable weather conditions is scarce. This study assessed the direct effects of glucose addition and in-situ warming on the extent of PE under field conditions in a temperate forest. We evaluated soil PE using 13C-glucose labelling, a simple and novel technique, based on the Keeling plot method. Glucose addition significantly enhanced native SOC decomposition and induced strong PE. However, the effect of in-situ warming on the extent of PE was not significant. This study confirms the importance of PE in regulating SOC turnover under field conditions. |
| Key Words: 13C-glucose,labelling technique,global warming,priming effect,phospholipid fatty acids,soil organic matter mineralisation,soil enzyme,soil respiration |
| Citation: Dong X H, Fang Y T, Liu D W, Guan X, Huang K, Liu Y Q, Wang Q K, Wang S L, Zhang W D. 2024. In-situ warming does not change soil priming effect induced by glucose addition in a temperate forest. Pedosphere. 34(4): 759–769. |
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