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Labile organic carbon fractions, regulator of CO2 emission: effect of plant residues and water regimes


Hassan, H and Bashir, S and Ahmed, N and Tanveer, M and Shah, AN and Bano, R and David, J, Labile organic carbon fractions, regulator of CO2 emission: effect of plant residues and water regimes, Clean -Soil, Air, Water, 44, (10) pp. 1358-1367. ISSN 1863-0669 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI: doi:10.1002/clen.201400405


The soil organic carbon (C) pool is the largest among the terrestrial C pools, and plays a vital role in the exchange of CO2. The increase in CO2 emission from soil to atmosphere has raised concerns about potential global warming. The current study was conducted with the objectives to investigate the relationship between labile organic C fractions and CO2 fluxes in an Alfisol soil treated with green manure (GM) and wheat straw (WS), and moisture regimes namely, W1 (50%) and W2 (100%). The incorporation of GM and WS increased (p < 0.05) the CO2 emission and labile C fractions under both water regimes. The CO2 fluxes showed positive correlation with all measured soil labile organic C fractions, i.e., total organic carbon (TOC), light fraction of organic carbon (LFOC), particulate organic carbon (POC), easily oxidizable carbon (EOC), dissolved organic carbon (DOC), microbial biomass carbon (MBC), reducing sugar carbon (RSC), and readily mineralizable carbon (RMC). The overall effect of labile C fractions on the CO2 emission was in the order LFOC > POC > EOC > DOC > MBC > RSC > RMC > TOC. The results demonstrated that LFOC, POC, EOC, DOC, MBC, RSC, and RMC had higher effects on CO2 fluxes as compared to TOC. The LFOC was more suitable and sensitive indicator than POC, EOC, DOC, MBC, WSC, RMC, and RSC for CO2 emissions and change in the soil organic C status.

Item Details

Item Type:Refereed Article
Keywords:alfisol soils, CO2 dynamics, global C cycle, greenhouse gas, soil water levels
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Other plant production and plant primary products
Objective Field:Other plant production and plant primary products not elsewhere classified
UTAS Author:Tanveer, M (Mr Mohsin Tanveer)
ID Code:117677
Year Published:2016
Web of Science® Times Cited:9
Deposited By:Office of the Tasmanian Institute of Agriculture
Deposited On:2017-06-23
Last Modified:2017-10-11

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