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Title

Ruminal fermentation, growth rate and methane production in sheep fed diets including white clover, soybean meal or Porphyra sp.

AuthorsLind, Vibeke; Weisbjerg, M.R.; Jørgensen, G.M.; Fernández-Yepes, J.; Arbesú, Lesly; Molina Alcaide, E.
KeywordsMacroalgae
Lamb
Ewe
In vitro
In vivo
Performance
Seaweed
Issue Date2020
PublisherMultidisciplinary Digital Publishing Institute
CitationAnimals 10(1): 79 (2020)
AbstractThe aim of the present work was to investigate the potential of Porphyra sp. as an alternative source of protein to soybean meal in diets for sheep. Our experimental treatments included a control diet (CON) based on grass silage and crushed oats and three diets containing protein supplements, clover silage (CLO), soybean meal (SOY) or Porphyra sp. (POR) to increase dietary crude protein concentrations. We studied its effects on rumen fermentation, growth rate and methane emissions. Ruminal fermentation characteristics, kinetics of gas production and methane production were studied in vitro by using batch cultures inoculated with rumen inoculum from sheep. There were no differences among diets in total volatile fatty acids (VFA) production or in the VFA profile in vitro. Across treatments, we measured no differences in methane production either in vitro or in vivo, and we saw no noticeable antimethanogenic effect of Porphyra sp. The present in vivo trial with lambs showed no differences in average daily weight gain when fed diets including Porphyra sp. or soybean meal diets (250 and 254 g/d, respectively). We conclude that Porphyra sp. has a protein value similar to high-quality protein sources like soybean meal.
Publisher version (URL)http://dx.doi.org/10.3390/ani10010079
URIhttp://hdl.handle.net/10261/216909
DOIhttp://dx.doi.org/10.3390/ani10010079
Identifiersdoi: 10.3390/ani10010079
issn: 2076-2615
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