Effects of faba bean, blue lupin and rapeseed meal supplementation on nitrogen digestion and utilization of dairy cows fed grass silage-based diets

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dc.contributor.author Kuoppala, K.
dc.contributor.author Jaakkola, S.
dc.contributor.author Garry, B.
dc.contributor.author Ahvenjarvi, S.
dc.contributor.author Rinne, M.
dc.date.accessioned 2021-08-19T12:36:01Z
dc.date.available 2021-08-19T12:36:01Z
dc.date.issued 2021-07
dc.identifier.citation Kuoppala , K , Jaakkola , S , Garry , B , Ahvenjarvi , S & Rinne , M 2021 , ' Effects of faba bean, blue lupin and rapeseed meal supplementation on nitrogen digestion and utilization of dairy cows fed grass silage-based diets ' , Animal , vol. 15 , no. 7 , 100300 . https://doi.org/10.1016/j.animal.2021.100300
dc.identifier.other PURE: 167718143
dc.identifier.other PURE UUID: 19d57c40-9579-4781-a27f-7f275452026d
dc.identifier.other WOS: 000681313700022
dc.identifier.uri http://hdl.handle.net/10138/333315
dc.description.abstract There is increasing interest in using locally produced protein supplements in dairy cow feeding. The objective of this experiment was to compare rapeseed meal (RSM), faba beans (FBs) and blue lupin seeds (BL) at isonitrogenous amounts as supplements of grass silage and cereal based diets. A control diet (CON) without protein supplement was included in the experiment. Four lactating Nordic Red cows were used in a 4 x 4 Latin Square design with four 21 d periods. The milk production increased with protein supplementation but when expressed as energy corrected milk, the response disappeared due to substantially higher milk fat concentration with CON compared to protein supplemented diets. Milk protein output increased by 8.5, 4.4 and 2.7% when RSM, FB and BL were compared to CON. The main changes in rumen fermentation were the higher propionate and lower butyrate proportion of total rumen volatile fatty acids when the protein supplemented diets were compared to CON. Protein supplementation also clearly increased the ruminal ammonia N concentration. Protein supplementation improved diet organic matter and NDF digestibility but efficiency of microbial protein synthesis per kg organic matter truly digested was not affected. Flow of microbial N was greater when FB compared to BL was fed. All protein supplements decreased the efficiency of nitrogen use in milk production. The marginal efficiency (amount of additional feed protein captured in milk protein) was 0.110, 0.062 and 0.045 for RSM, FB and BL, respectively. The current study supports the evidence that RSM is a good protein supplement for dairy cows, and this effect was at least partly mediated by the lower rumen degradability of RSM protein compared to FB and BL. The relatively small production responses to protein supplementation with simultaneous decrease in nitrogen use efficiency in milk production suggest that economic and environmental consequences of protein feeding need to be carefully considered. (c) 2021 The Authors. Published by Elsevier B.V. on behalf of The Animal Consortium. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). en
dc.format.extent 9
dc.language.iso eng
dc.relation.ispartof Animal
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Digestibility
dc.subject Grain legume
dc.subject Milk production
dc.subject Nitrogen use efficiency
dc.subject Rumen fermentation
dc.subject MILK-PRODUCTION
dc.subject CONCENTRATE FACTORS
dc.subject RESPONSES
dc.subject METABOLISM
dc.subject HISTIDINE
dc.subject FORAGE
dc.subject ENERGY
dc.subject SEEDS
dc.subject 412 Animal science, dairy science
dc.title Effects of faba bean, blue lupin and rapeseed meal supplementation on nitrogen digestion and utilization of dairy cows fed grass silage-based diets en
dc.type Article
dc.contributor.organization Department of Agricultural Sciences
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1016/j.animal.2021.100300
dc.relation.issn 1751-7311
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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