globalchange  > 气候减缓与适应
DOI: 10.1002/2017JG003856
Scopus记录号: 2-s2.0-85043722350
论文题名:
Land Use, Land Use History, and Soil Type Affect Soil Greenhouse Gas Fluxes From Agricultural Landscapes of the East African Highlands
作者: Wanyama I.; Rufino M.C.; Pelster D.E.; Wanyama G.; Atzberger C.; van Asten P.; Verchot L.V.; Butterbach-Bahl K.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期:3
起始页码: 976
结束页码: 990
语种: 英语
英文关键词: forest ; land use change ; soil core incubation ; soil texture ; tropical soils
Scopus关键词: Eucalyptus
英文摘要: 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. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114393
Appears in Collections:气候减缓与适应

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作者单位: International Livestock Research Institute (ILRI), Nairobi, Kenya; Center for International Forestry Research (CIFOR), Nairobi, Kenya; Lancaster Environment Centre, University of Lancaster, Lancaster, United Kingdom; Science and Technology Branch, Agriculture and Agri-Food Canada, Quebec City, QC, Canada; University of Natural Resources and Applied Life Sciences (BOKU), Vienna, Austria; International Institute of Tropical Agriculture (IITA), Kampala, Uganda; International Centre for Tropical Agriculture (CIAT), Cali, Colombia; Institute of Meteorology and Climate Research, Atmospheric Environmental Research (IMK-IFU), Karlsruhe Institute of Technology, Garmisch-Partenkirchen, Germany

Recommended Citation:
Wanyama I.,Rufino M.C.,Pelster D.E.,et al. Land Use, Land Use History, and Soil Type Affect Soil Greenhouse Gas Fluxes From Agricultural Landscapes of the East African Highlands[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(3)
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