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    Land Use, Land Use History, and Soil Type Affect Soil Greenhouse Gas Fluxes From Agricultural Landscapes of the East African Highlands

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    Authors
    Wanyama, Ibrahim
    Rufino, Mariana C.
    Pelster, David E.
    Wanyama, George N.
    Atzberger, Clement
    Asten, Piet J.A. van
    Verchot, Louis V.
    Butterbach-Bahl, Klaus
    Date
    2018
    Language
    en
    Type
    Journal Article
    Review status
    Peer Review
    ISI journal
    Accessibility
    Open Access
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    Citation
    Wanyama, I., Rufino, M. C., Pelster, D. E., Wanyama, G., Atzberger, C., van Asten, P., Verchot, Louis. V. and Butterbach-Bahl, K. (2018) Land-use, land-use history and soil type affect soil greenhouse gas fluxes from agricultural landscapes of the East African highlands, Journal of Geophysical Research: Biogeosciences,123(3): 976-990.
    Permanent link to cite or share this item: https://hdl.handle.net/10568/92025
    DOI: https://doi.org/10.1002/2017JG003856
    Abstract/Description
    This study aims to explain effects of soil textural class, topography, land use, and land use history on soil greenhouse gas (GHG) fluxes in the Lake Victoria region. We measured GHG fluxes from intact soil cores collected in Rakai, Uganda, an area characterized by low‐input smallholder (<2 ha) farming systems, typical for the East African highlands. The soil cores were air dried and rewetted to water holding capacities (WHCs) of 30, 55, and 80%. Soil CO2, CH4, and N2O fluxes were measured for 48 h following rewetting. Cumulative N2O fluxes were highest from soils under perennial crops and the lowest from soils under annual crops (P < 0.001 for all WHC). At WHC of 55% or 80%, the sandy clay loam soils had lower N2O fluxes than the clay soils (P < 0.001 and P = 0.041, respectively). Cumulative soil CO2 fluxes were highest from eucalyptus plantations and lowest from annual crops across multiple WHC (P = 0.014 at 30% WHC and P < 0.001 at both 55 and 80% WHC). Methane fluxes were below detectable limits, a shortcoming for using soil cores from the top soil. This study reveals that land use and soil type have strong effects on GHG fluxes from agricultural land in the study area. Field monitoring of fluxes is needed to confirm whether these findings are consistent with what happens in situ.
    CGIAR Author ORCID iDs
    Ibrahim Wanyamahttps://orcid.org/0000-0001-9006-139X
    Mariana Rufinohttps://orcid.org/0000-0003-4293-3290
    David Pelsterhttps://orcid.org/0000-0002-0461-7855
    Clement Atzbergerhttps://orcid.org/0000-0003-2169-8009
    Louis Verchothttps://orcid.org/0000-0001-8309-6754
    Klaus Butterbach-Bahlhttps://orcid.org/0000-0001-9499-6598
    CGIAR Affiliations
    Climate Change, Agriculture and Food Security; Livestock
    AGROVOC Keywords
    climate change; food security; agriculture; soil; greenhouse gases; land use
    Subjects
    CLIMATE CHANGE; LIVESTOCK; LOW EMISSIONS DEVELOPMENT; LAND USE; SOIL INFORMATION; CLIMATE CHANGE;
    Countries
    Uganda
    Regions
    Africa; Eastern Africa
    Collections
    • CCAFS Journal Articles [1243]
    • CIAT Articles in Journals [2634]
    • CIAT Soils [227]
    • CIFOR publications [7477]
    • CRP Livestock and the environment flagship [205]
    • CRP Livestock journal articles [670]
    • CRP Livestock Uganda [160]
    • ILRI articles in journals [5969]
    • ILRI LSE program outputs [305]
    • ILRI Mazingira Centre [102]
    • ILRI sustainable livestock systems program outputs [736]

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