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Methane production from locally available ruminant feedstuffs in Ethiopia - An in vitro study

dc.contributor.authorBekele, Wondimagegne
dc.contributor.authorHuhtanen, Pekka
dc.contributor.authorZegeye, Abiy
dc.contributor.authorSimachew, Addis
dc.contributor.authorSiddique, Abu Bakar
dc.contributor.authorAlbrectsen, Benedicte Riber
dc.contributor.authorRamin, Mohammad
dc.contributor.departmentid4100211510
dc.contributor.organizationLuonnonvarakeskus
dc.date.accessioned2025-01-09T14:12:53Z
dc.date.accessioned2025-05-28T08:01:13Z
dc.date.available2025-01-09T14:12:53Z
dc.date.issued2024
dc.description.abstractAchieving optimal nutrient composition in locally sourced ruminant feeds is important, but can be challenging in resource-limited production systems. For example, improving the composition of available local feed resources is a key obstacle to efficiently mitigating enteric methane (CH4) emissions in ruminants. This study characterized the nutritional content and in vitro methane (CH4) yield of ruminant feedstuffs accessible in Ethiopia. A survey of 60 experienced farmers in two representative districts in Amhara region, Ethiopia, provided 33 feed samples, which were classified into four ruminant feed categories: Grasses (n=10); indigenous plants (trees, shrubs, herbaceous plants) (n=13); crop residues (n=5); and agro-industrial by-products (n=5). Nutritional composition was assessed by proximate and detergent methods. Methane yield (g CH4/kg feed dry matter (DM)) and total gas yield (L/kg DM) were evaluated using a fully automated in vitro gas production system. A colorimetric assay was conducted to measure condensed tannin content (CT, mg/g) in relevant feeds. Lower crude protein (CP) values were observed for the grass (mean 65.2 g/kg DM) and crop residues (mean 54.5 g/kg DM) categories. Agro-industrial by-products had the highest CP (mean 260 g/kg DM), while indigenous plants exhibited intermediate levels (163 g/kg DM). There was significant variation in CH4 yield (P<0.01) between grasses (12.4–24.7 g/kg DM) indigenous plants (1.8–19.3 g/kg DM), and agro-industrial by-products (8.1–26.9 g/kg DM). The indigenous plant Trifolium acaule gave the lowest in vitro CH4 yield (1.8 g/kg DM). A positive relationship was observed between in vitro dry matter digestibility (IVDMD), CH4, and total gas yield. Percentage of CH4 in total gas production varied with feed category (grasses 14.5–19.6%; indigenous plants 3.1–16.9%; crop residues 15.8–20.6%; agro-industrial by-products 12.8–18.7%), and within category, e.g., Trifolium acaule (3.1%), Acacia nilotica L. (7.1%), Ziziphus spina-christi (9.9%), brewer’s spent grains (BSG) (12.8%), local liquor (areki) residues (14.1%), and local beer (tella) residues (15.1%). A negative relationship was observed between CT content and in vitro CH4 yield, with a stronger (P<0.05) correlation for soluble CTs (R2 = 0.46) than cell-bound CTs (R2 = 0.25) and total CTs (R2 = 0.29). Based on methanogenic properties and effects of CTs on in vitro CH4 yield, indigenous plants should be prioritized in ruminant rations in Ethiopia. Making nutritional composition and CH4 data publicly available could help develop environmentally sound, cost-effective rations for ruminant livestock, benefiting local farmers and leading to more sustainable and efficient livestock production in Ethiopia.
dc.description.vuosik2024
dc.format.bitstreamtrue
dc.format.pagerange15 p.
dc.identifier.citationHow to cite: Wondimagegne Bekele, Pekka Huhtanen, Abiy Zegeye, Addis Simachew, Abu Bakar Siddique, Benedicte Riber Albrectsen, Mohammad Ramin, Methane production from locally available ruminant feedstuffs in Ethiopia – An in vitro study, Animal Feed Science and Technology, Volume 312, 2024, 115977, https://doi.org/10.1016/j.anifeedsci.2024.115977
dc.identifier.olddbid498502
dc.identifier.oldhandle10024/555930
dc.identifier.urihttps://jukuri.luke.fi/handle/11111/13611
dc.identifier.urlhttps://doi.org/10.1016/j.anifeedsci.2024.115977
dc.identifier.urnURN:NBN:fi-fe202501092175
dc.language.isoen
dc.okm.avoinsaatavuuskytkin1 = Avoimesti saatavilla
dc.okm.corporatecopublicationei
dc.okm.discipline412
dc.okm.internationalcopublicationon
dc.okm.julkaisukanavaoa2 = Osittain avoimessa julkaisukanavassa ilmestynyt julkaisu
dc.okm.selfarchivedon
dc.publisherElsevier
dc.relation.articlenumber115977
dc.relation.doi10.1016/j.anifeedsci.2024.115977
dc.relation.ispartofseriesAnimal feed science and technology
dc.relation.issn0377-8401
dc.relation.issn1873-2216
dc.relation.volume312
dc.rightsCC BY 4.0
dc.source.identifierhttps://jukuri.luke.fi/handle/10024/555930
dc.subjectlocal feeds
dc.subjectCH4
dc.subjectcondensed tannins
dc.subjectCH4 gas percentage
dc.subjectin vitro dry matter digestibility
dc.tehOHFO-Alku-3
dc.titleMethane production from locally available ruminant feedstuffs in Ethiopia - An in vitro study
dc.typepublication
dc.type.okmfi=A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä|sv=A1 Originalartikel i en vetenskaplig tidskrift|en=A1 Journal article (refereed), original research|
dc.type.versionfi=Publisher's version|sv=Publisher's version|en=Publisher's version|

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