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Biochar use for climate-change mitigation in rice cropping systems
Univ New England, Sch Environm & Rural Sci, Armidale, NSW 2351, Australia..ORCID iD: 0000-0002-8300-2786
Univ New England, Sch Environm & Rural Sci, Armidale, NSW 2351, Australia.;Beef Ind Ctr, NSW Dept Primary Ind, Trevenna Rd, Armidale, NSW 2351, Australia..
Univ New England, Sch Environm & Rural Sci, Armidale, NSW 2351, Australia..
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2016 (English)In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 116, p. 61-70Article in journal (Refereed) Published
Abstract [en]

This study estimated the climate change effects of alternative rice production systems in North Vietnam with different residue management options, using Life Cycle Assessment (LCA). The traditional practice of open burning of residues (System A) was compared with the alternative of converting residues to biochar, which was returned to the same land area from which the residues were obtained (System B). Pyrolytic cook-stoves and drum ovens were assumed to be used by households to produce biochar, and the cook-stoves produced heat energy for cooking. The annual rate of biochar applied was determined by the amount of biochar produced from the straw and husk available. We assumed that agronomic effects of biochar increased with each annual biochar application until reaching maximum benefits at 18 Mg ha I, which takes eight years to be produced in pyrolytic cook-stoves and drum ovens. The largest contributor to the carbon footprint of rice at the mill gate, was CH4 emissions from soil, in both systems. Biochar addition reduced the carbon footprint of spring rice and summer rice by 26% and 14% respectively, compared with System A, in the first year of application. These values substantially increased to 49% and 38% after eight years of biochar addition. The climate effect of System B was most sensitive to the assumed suppression of soil CH4 emissions due to biochar application. (C) 2015 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCI LTD , 2016. Vol. 116, p. 61-70
Keywords [en]
Life Cycle Assessment, Methane emissions, Rice residues, Pyrolytic cook-stove, Carbon footprint
Identifiers
URN: urn:nbn:se:kau:diva-75577DOI: 10.1016/j.jclepro.2015.12.083ISI: 000370885800007OAI: oai:DiVA.org:kau-75577DiVA, id: diva2:1369469
Available from: 2019-11-12 Created: 2019-11-12 Last updated: 2019-11-12

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Mohammadi, Ali

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