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Title: Biomass carbon: litter quality and implications for carbon sequestration by agroforestry in coastal Kenya
Contributor(s): Walela, Christine (author); Kamiri, Ndufa (author); Kirongo, Balozi (author); Vincent, Oeba (author); Martin, Welimo (author); Kristiansen, Paul  (author)orcid ; Daniel, Heiko  (author)
Publication Date: 2010
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Abstract: The potential impact of agroforestry systems on C sequestration is widely recognized. However limited data is available on its impact on C dynamics, as much of the previous research has been focused on agricultural productivity. This research was therefore conducted to determine biomass carbon and litter quality of commonly recommended improved fallow species, at the coastal region in Kenya. An on-farm experiment was established in 2006 at a coastal Kenya site, using a Randomized Complete Block Design with five agroforestry species replicated thrice. Biomass carbon and litter quality was assessed at 6 and 12 months after sowing (MAS). Data was analysed using R version 2.9.0. The effects of species, measurement time and their interaction on total carbon were highly significant (P < 0.001). Total carbon stocks at 6 MAS ranged from 0.04 ('S.sesban') to 1.4 Mg C /ha ('M.pruriens') compared to 1.7 ('S.sesban') to 20.3 Mg C /ha ('T.candida') at 12 MAS. Results indicate that substantial amounts of C were sequestered in the biomass. However, duration of the fallow is a key factor to be considered. Litter quality was high with average polyphenol contents of 2.6 % while lignin contents were highest in 'T.candida' (16.3 %).
Publication Type: Conference Publication
Conference Name: 19th World Congress of Soil Science, Brisbane, Australia, 1st - 6th August, 2010
Conference Details: 19th World Congress of Soil Science, Brisbane, Australia, 1st - 6th August, 2010
Source of Publication: Proceedings of the 19th World Congress of Soil Science: Soil Solutions for a Changing World, p. 5-8
Publisher: International Union of Soil Sciences and Australian Society of Soil Science Inc
Place of Publication: Brisbane, Australia
Field of Research (FOR): 050305 Soil Physics
050301 Carbon Sequestration Science
Socio-Economic Outcome Codes: 960906 Forest and Woodlands Land Management
820101 Hardwood Plantations
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
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