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Value chain and nutritional analyses of warqe food products in relation to post-harvest losses

Tuffa, Ashenafi Chaka (2019). Value chain and nutritional analyses of warqe food products in relation to post-harvest losses. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2019:1
ISBN 978-91-7760-278-1
eISBN 978-91-7760-279-8
[Doctoral thesis]

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Food losses and waste are global problems, but are particularly critical in food-insecure countries. Losses from root and tuber crops are known to be high in developing countries, where much of the population is dependent on these crops. For example, warqe (Ensete ventricosum) is used as a staple food for millions of Ethiopians, mainly in the form of kocho and bulla foods. Despite its widespread use, there is no adequate information about the magnitude of food losses in the supply chain for warqe, the nutrient content of warqe foods and the microbial dynamics of kocho fermentation enhancer (gammaa). Therefore this thesis examined the nutritional content, value chain and post-harvest losses of kocho and bulla foods along the supply chain, based on three surveys and two laboratory studies conducted in Ethiopia and Sweden between 2013 and 2018.

Laboratory analyses showed that warqe foods are rich in starch (75 g/100g DM in kocho and 89 g/100g DM in bulla) and a good source of major micronutrients, such as K, Ca, P and Mg. However, both were found to be low in total fat (0.20 g/100g DM in kocho and 0.10 g/100g DM in bulla), protein (1.67 g/100g DM in kocho and 0.45 g/100g DM in bulla) and total dietary fibre (3.40 g/100g DM in kocho and 0.64 g/100g DM in bulla). Field surveys revealed that warqe foods reach the final consumer through different suppliers in complex chains involving six principal value chain actors, with farmers and bulla processors being the main actors.
Significant amounts of warqe foods are wasted throughout the supply chain, with highest losses of kocho (24%) occurring at retailer level and of bulla (29%) at processor level. Lack of appropriate processing technologies at producer and processor level, use of inferior packaging materials and improper handling in the market are the leading causes of losses. Microbiota analysis showed that Lactobacillus species from lactic acid bacteria isolates and Enterobacteriaceae from aerobic mesophilic bacteria isolates are the most abundant and dominant microorganisms in gammaa fermentation.

Overall, the results indicate a need for better communication to enable effective information transfer in the supply chain, appropriate packaging and storage to reduce losses and upgrading of the nutritional content of warqe foods to provide an adequate staple diet for consumers.

Authors/Creators:Tuffa, Ashenafi Chaka
Title:Value chain and nutritional analyses of warqe food products in relation to post-harvest losses
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2019
Depositing date:31 December 2018
Number of Pages:79
ITuffa, A.C*., Landberg, R., Gebresenbet, G. and Andersson, R. (2018). Determination of the nutritional profile of warqe foods, kocho and bulla, in Ethiopia. Food Research International (submitted)
IITuffa, A.C*., Kenea, T. and Gebresenbet, G. (2016). Analysis of the supply chain and logistics practices of warqe food products in Ethiopia. International Journal on Food System Dynamics 7(3), 213-228.
IIITuffa, A.C*., Amentae, T.K. and Gebresenbet G. (2017). Value chain analysis of warqe food products in Ethiopia. International Journal of Managing Value and Supply Chains 8(1), 23-42.
IVTuffa, A.C., Amentae, T.K., Balemi, T. and Gebresenbet, G*. (2017). Assessment of post-harvest losses of warqe food products along the supply chain in Central Ethiopia. African Journal of Agricultural Research 12(9), 750-763.
VDibaba, A. H., Tuffa, A.C*., Gebremedhin, E.Z., Nugus, G.G. and Gebresenbet, G. (2018). Microbiota and physicochemical analysis of traditional kocho fermentation enhancer (gammaa) to reduce losses in the Highlands of Ethiopia. Microbiology and Biotechnology Letters 46(3), 210-224.
Place of Publication:Uppsala
Publisher:Department of Energy and Technology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-7760-278-1
ISBN for electronic version:978-91-7760-279-8
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F01 Crop husbandry
Q Food science > Q01 Food science and technology
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Horticulture
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Food Science
Keywords:bulla, ensete ventricosum, Ethiopia, kocho, nutrient profile, post-harvest losses, value chain
Permanent URL:
ID Code:15818
Faculty:NL - Faculty of Natural Resources and Agricultural Sciences (until 2013)
Department:(NL, NJ) > Dept. of Energy and Technology
Deposited By: Ashenafi Chaka Tuffa
Deposited On:07 Jan 2019 09:18
Metadata Last Modified:09 Sep 2020 14:17

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