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来源类型 | Articles |
规范类型 | 论文 |
DOI | https://doi.org/10.1002/2017JG003856 |
ISSN | 2169-8961 |
Land Use, Land Use History, and Soil Type Affect Soil Greenhouse Gas Fluxes From Agricultural Landscapes of the East African Highlands | |
Ongona, P.T.; Lescuyer, G.; Schure, J.; Lokombe, D. | |
发表日期 | 2018 |
出处 | Journal of Geophysical Research: Biogeosciences 123(3): 976-990 |
出版年 | 2018 |
语种 | 英语 |
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. |
主题 | land use ; land use change ; soil ; greenhouse gases ; landscape |
区域 | East Africa |
URL | https://www.cifor.org/library/6923/ |
来源智库 | Center for International Forestry Research (Indonesia) |
引用统计 | |
资源类型 | 智库出版物 |
条目标识符 | http://119.78.100.153/handle/2XGU8XDN/93901 |
推荐引用方式 GB/T 7714 | Ongona, P.T.,Lescuyer, G.,Schure, J.,et al. Land Use, Land Use History, and Soil Type Affect Soil Greenhouse Gas Fluxes From Agricultural Landscapes of the East African Highlands. 2018. |
条目包含的文件 | ||||||
文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
21698961.jpg(9KB) | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
AWanyama1801.pdf(1093KB) | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 |
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