Component composition, in vitro gas and methane production profiles of fruit by-products and leaves of root crops. (11th December 2018)

• Record Type: Journal Article
• Authors: Melesse, A.; Steingass, H.; Schollenberger, M.; Rodehutscord, M.
• Is Part Of: Journal of agricultural science. Volume 156:Number 7(2018)
• Page Start: 949
• Page End: 958
• Publication Date: 2018-12-11
• Subjects: Component composition, -- fruit by-products, -- in vitro gas production, -- methane, -- root crop leaves; Agriculture -- Periodicals; 630.5
• DOI: 10.1017/S0021859618000928
• Languages: English
• ISSNs: 0021-8596

Abstract

Abstract: The current study was conducted to evaluate the component composition, anti-nutritional factors, in vitro gas production (GP) and methane (CH4 ) production profiles of fruit by-products (pineapple pulp, mango seed kernels, banana and papaya peel, Moringa stenopetala and Moringa oleifera seeds) and leaves of root crops (sweet potato [ Ipomoea batatas ], cassava [ Manihot esculenta ], yam [ Dioscorea abyssinica ], enset [ Ensete ventricosum ] and samma [ Urtica simensis ]). Root crop leaves had high crude protein (CP) ranging from 211 to 318 g/kg dry matter (DM) in yam and samma, respectively. M. stenopetala seeds contained the highest CP (450 g/kg DM). Samma leaves were rich in calcium (58.6 g/kg DM) and iron (1186 mg/kg DM). Leaves of root crops had similar concentrations of essential amino acids with appreciable values. Total phenols were highest in mango seed kernels (158 g/kg DM). The asymptotic GP at 96 h incubation of pineapple pulp, papaya and banana peel was 397, 358 and 279 ml/g DM, respectively, and differed significantly from each other. Sweet potato and yam leaves produced 238 and 225 ml/g DM GP, respectively, being significantly higher than those of other root crops. CH4 production was significantly lowest in Moringa seeds, mango seed kernels and sweet potato leaves. In conclusion, fruit by-products have the potential as energy sources and root crop leaves as protein supplements for ruminant and non-ruminant animals. Moringa seeds, mango seed kernels and sweet potato leaves were identified as potential candidates in mitigating CH4 emissions in tropical livestock with animal-based experiments recommended to validate the in vitro findings.