IDEAS home Printed from https://ideas.repec.org/
MyIDEAS: Log in (now much improved!) to save this article

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

Listed author(s):
  • Bharati Kollah
  • Garima Dubey
  • Peter Dunfield
  • Santosh Mohanty

    ()

Registered author(s):

    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. Copyright Springer Science+Business Media Dordrecht 2015

    If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.

    File URL: http://hdl.handle.net/10.1007/s11027-014-9555-6
    Download Restriction: Access to full text is restricted to subscribers.

    As the access to this document is restricted, you may want to look for a different version under "Related research" (further below) or search for a different version of it.

    Article provided by Springer in its journal Mitigation and Adaptation Strategies for Global Change.

    Volume (Year): 20 (2015)
    Issue (Month): 8 (December)
    Pages: 1459-1470

    as
    in new window

    Handle: RePEc:spr:masfgc:v:20:y:2015:i:8:p:1459-1470
    DOI: 10.1007/s11027-014-9555-6
    Contact details of provider: Web page: http://www.springer.com

    Order Information: Web: http://www.springer.com/economics/journal/11027

    No references listed on IDEAS
    You can help add them by filling out this form.

    This item is not listed on Wikipedia, on a reading list or among the top items on IDEAS.

    When requesting a correction, please mention this item's handle: RePEc:spr:masfgc:v:20:y:2015:i:8:p:1459-1470. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Sonal Shukla)

    or (Rebekah McClure)

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If references are entirely missing, you can add them using this form.

    If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    This information is provided to you by IDEAS at the Research Division of the Federal Reserve Bank of St. Louis using RePEc data.