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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Litter- and soil carbohydrate-carbon stocks in 2-, 4- and 10-year-old improved fallows in eastern Zambia
Biogeochemistry, Volume 112, No. 1-3, Year 2013
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Description
This study evaluated the effects of tree species and sites on soil carbohydrates, litterfall, and litter chemistry in 2-, 4- and 10-year-old improved fallows at three sites in eastern Zambia. Between April 2002 and August 2003, litter was collected in 2-year-old tree fallows at Kalichero, Kalunga and Msekera for chemical analyses. Soil samples collected at 0-30 cm from all experiments were analysed for total soil organic carbon (SOC), but only those from 4- and 10-year-old fallows were analysed for carbohydrates. Soil arabinose- and mannose-C stocks, and carbohydrate-C percentages of SOC (7. 7-20. 6 %) significantly (P < 0. 05) differed across tree species in 10-year-old coppicing fallows at Msekera. Converting M + F to improved fallows resulted in a decline in monosaccharide-C, carbohydrate-C stocks and carbohydrate-C percentage of SOC. There were significant (P < 0. 05) variations in litterfall (0. 7-2. 3 t ha-1 year-1) and litter C contents (0. 3-1. 1 t ha-1 year-1) across 2-year-old coppicing tree fallows at Msekera. Litter production and C contents were significantly greater on sandy soils at Kalunga than on fine-textured soils at Msekera. Litter chemical contents (C, N, AUR and polyphenols) and ratios (C:N, P:N, AUR:N, and (AUR + P):N) for litter in fallows differed significantly (P < 0. 05) across species and sites. In this study, the role of litter in carbon cycling in improved fallows depended on tree species and site conditions. © 2012 Springer Science+Business Media B.V.
Authors & Co-Authors
Kaonga, Martin L.
United Kingdom, London
A Rocha International
Mafongoya, P. L.
Zimbabwe, Harare
University of Zimbabwe
Statistics
Citations: 2
Authors: 2
Affiliations: 2
Identifiers
Doi:
10.1007/s10533-012-9741-0
ISSN:
01682563
e-ISSN:
1573515X
Research Areas
Environmental
Study Locations
Zambia