NDLI: Influence of bioenergy crop Jatropha curcas amendment on soil biogeochemistry in a tropical vertisol

Content Provider	Springer Nature Link
Author	Kollah, Bharati Dubey, Garima Dunfield, Peter Mohanty, Santosh Ranjan
Copyright Year	2014
Abstract	Experiments were carried out to determine how the incorporation of biomass from the bioenergy crop Jatropha curcas into a tropical vertisol affects the biogeochemical processes important for greenhouse gas (GHG) fluxes, specifically methane (CH$_{4}$) production, carbon dioxide (CO$_{2}$) production, and CH$_{4}$ consumption. Leaf biomass of J. curcas was incorporated at 0.1, 0.5, and 1 % (w/w) into soil maintained under 60 % of moisture-holding capacity (MHC). Biomass addition significantly stimulated potential CH$_{4}$ and CO$_{2}$ production while inhibiting potential CH$_{4}$ consumption. When 1 % of J. curcas biomass was added to soil, potential CH$_{4}$ production increased nearly 50-fold over 60 days, from 2.45 μg CH$_{4}$ g$^{−1}$ soil day$^{−1}$ in unamended soil to 115 μg g$^{−1}$ day$^{−1}$ in soil containing leaf biomass. Soil CO$_{2}$ production also doubled when the J. curcas biomass was added. The potential CH$_{4}$ consumption rate of soil was inhibited almost completely by 1 % of added biomass. The culturable methanotroph population was positively correlated with the CH$_{4}$ consumption rate (r = 0.961, p < 0.0001) and was inhibited 20-fold by 1 % of biomass addition. In contrast, the total population of aerobic heterotrophs culturable on a complex medium increased from 11 to 59 × 10$^{6}$ of colony-forming units (CFU) g$^{−1}$ of soil after biomass addition. Significant positive correlation was observed between the total heterotroph population and both CH$_{4}$ production (r = 0.861, p = 0.0003) and CO$_{2}$ production (r = 0.863, p = 0.0002). Our study shows that biomass from the bioenergy crop J. curcas can affect soil biogeochemical processes that control GHG emissions. We propose that a high incorporation of J. curcas biomass could dramatically change the CH$_{4}$ flux in tropical soil by simultaneously increasing CH$_{4}$ production and decreasing CH$_{4}$ consumption, and we therefore recommend that biomass incorporation to soil be minimized (<0.1 %) as a strategy to mitigate GHG emission.
Starting Page	1459
Ending Page	1470
Page Count	12
File Format	PDF
ISSN	13812386
Journal	Mitigation and Adaptation Strategies for Global Change
Volume Number	20
Issue Number	8
e-ISSN	15731596
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-03-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bioenergy Carbon dioxide Climate mitigation Greenhouse gas Jatropha Leaf biomass Methane Tropical soil Atmospheric Sciences Climate Change Management and Policy Environmental Management
Content Type	Text
Resource Type	Article
Subject	Ecology Global and Planetary Change

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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