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https://hdl.handle.net/2440/73366
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Type: | Journal article |
Title: | Short-term carbon mineralization in saline-sodic soils |
Author: | Setia, R. Setia, D. Marschner, P. |
Citation: | Biology and Fertility of Soils, 2012; 48(4):475-479 |
Publisher: | Springer-Verlag |
Issue Date: | 2012 |
ISSN: | 0178-2762 1432-0789 |
Statement of Responsibility: | Raj Setia, Deepika Setia, Petra Marschner |
Abstract: | Previous studies have shown that carbon (C) mineralization in saline or sodic soils is affected by various factors including organic C content, salt concentration and water content in saline soils and soil structure in sodic soils, but there is little information about which soil properties control carbon dioxide (CO2) emission from saline-sodic soils. In this study, eight field-collected saline–sodic soils, varying in electrical conductivity (ECe, a measure of salinity, ranging from 3 to 262 dS m−1) and sodium adsorption ratio (SARe, a measure of sodicity, ranging from 11 to 62), were left unamended or amended with mature wheat or vetch residues (2% w/w). Carbon dioxide release was measured over 42 days at constant temperature and soil water content. Cumulative respiration expressed per gram SOC increased in the following order: unamended soil<soil amended with wheat residues (C/N ratio 122)<soil with vetch residue (C/N ratio 18). Cumulative respiration was significantly (p < 0.05) negatively correlated with ECe but not with SARe. Our results show that the response to ECe and SARe of the microbial community activated by addition of organic C does not differ from that of the less active microbial community in unamended soils and that salinity is the main influential factor for C mineralization in saline–sodic soils. |
Keywords: | Electrical conductivity Respiration Sodium adsorption ratio Wheat Vetch |
Rights: | © Springer-Verlag 2011 |
DOI: | 10.1007/s00374-011-0643-4 |
Published version: | http://dx.doi.org/10.1007/s00374-011-0643-4 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest Environment Institute publications |
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