Negative priming of native soil organic carbon mineralization by oilseed biochars of contrasting quality

European Journal of Soil Science - Tập 66 Số 4 - Trang 714-721 - 2015
Tatiana Rittl1, E. H. Novotny2, Fabiano de Carvalho Balieiro2, Ellis Hoffland1, Bruno José Rodrígues Alves3, Thomas W. Kuyper1
1Department of Soil Quality Wageningen University Droevendaalsesteeg 6700 AA Wageningen the Netherlands
2Embrapa Solos Jardim Botânico 22460‐000 Rio de Janeiro Brazil
3Embrapa Agrobiologia Rodovia BR 465 Km 7 23890‐000 Seropédica Brazil

Tóm tắt

SummaryOilseed‐derived biochar, a by‐product of pyrolysis for biodiesel production, is richer in aliphatic compounds than the commonly studied wood‐derived biochar, affecting both its mineralization in soil and its interaction with native soil organic carbon (nSOC). Here, we investigated the soil C sequestration potential of three different oilseed biochars derived from C3 plant material: soyabean, castor bean and jatropha cake. The chemical composition of these biochars was determined by elemental analysis (CHN) and 13C NMR spectroscopy. The cumulative CO2 efflux from 30‐day laboratory incubations of biochar mixed with a sandy soil containing nSOC from C4 plants was measured as a proxy for mineralization rate. The relative contribution of each source to CO2 production was calculated based on the 13C‐signatures of total CO2 efflux and the source materials (soil and biochars). Our results showed that: (i) castor bean biochar contained relatively large amounts of aliphatic compounds, resulting in a greater mineralization rate than soyabean and jatropha biochars; (ii) CO2 efflux from the soil‐biochar mixtures originated mostly from the biochars, suggesting that these biochars contain rapidly decomposable compounds; and (iii) all three oilseed biochars decelerated nSOC mineralization. This negative priming effect appeared to be caused by different factors. We conclude that oilseed biochars have the potential to increase soil C stocks directly and increase soil C sequestration indirectly in the short term through negative priming of nSOC mineralization.

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Tài liệu tham khảo

ANP, 2014, Produção Nacional de Biodiesel Puro (B100)

10.1111/ejss.12074

10.2136/sssaj1953.03615995001700010008x

Budai A., 2013, Biochar carbon stability test method: an assessment of methods to determine biochar carbon stability, International Biochar Initiative, 1

10.1007/978-94-009-4932-4_54

10.1080/10937404.2010.499736

10.1002/jsfa.4056

FAO, 2006, World Reference Base for Soil Resources: A Framework for International Classification, Correlation, and Communication

10.1016/S0146-6380(00)00044-9

10.1016/j.orggeochem.2004.03.003

10.1021/es990506l

Johnson R.A., 1999, Applied Multivariate Statistical Analysis

10.1016/j.soilbio.2011.10.012

10.1021/es9031419

10.1021/es202186j

Lehmann J., 2009, Biochar for Environmental Management: Science and Technology, 1

Lehmann J., 2009, Biochar for Environmental Management: Science and Technology, 183

10.1016/j.soilbio.2011.07.020

10.1126/science.1159792

10.1007/s00374-005-0049-2

10.1007/s00114-006-0126-x

10.1016/j.orggeochem.2006.06.015

10.1017/S0033822200041242

10.1016/j.biombioe.2012.06.026

10.1111/gcbb.12234

10.1038/nature10386

10.1002/(SICI)1097-0231(19990715)13:13<1284::AID-RCM578>3.0.CO;2-0

10.1016/j.still.2003.08.007

Verheijen F. Jeffery S. Bastos A.C. van derVelde M.&Diafas I.2009.Biochar Application to Soils: A Critical Scientific Review of Effects on Soil Properties Processes and Functions. European Commission JRC Technical Report No EUR 24099 EN Office for the Official Publications of the European Communities Luxemburg.

10.1016/j.biortech.2008.08.040

10.1111/ejss.12100

10.1016/j.soilbio.2010.04.009

10.1016/j.soilbio.2014.02.009

10.1016/j.orggeochem.2014.10.002

10.1016/j.soilbio.2011.02.005

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Thông tin xuất bản

European Journal of Soil Science

Tập 66 Số 4

714-721

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