Dairy cow response to lysine and methionine when reducing metabolisable protein through soybean meal
| Autor: | Lemosquet, Sophie, Cirot, C., Bahloul, L., Lamberton, Philippe |
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| Přispěvatelé: | Physiologie, Environnement et Génétique pour l'Animal et les Systèmes d'Elevage [Rennes] (PEGASE), AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Ajinomoto Animal Nutrition Europe, Adisseo, EAAP, Bernard, Emilie |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | 71. Annual Meeting of the European Federation of Animal Science (EAAP) 71. Annual Meeting of the European Federation of Animal Science (EAAP), Dec 2020, Virtual meeting, Portugal. Wageningen Academic Publishers, Book of abstracts, 26, pp.502, 2020, Book of abstracts of the 71st annual meeting of the european federation of animal science |
| Popis: | International audience; Reducing soybean meal (SBM) in dairy diets could be a way to increase protein autonomy of French dairy farms. However, decreasing metabolisable protein supply (PDI in INRA, 2018) through SBM in corn silage based diets, that are known to be deficient in 2 amino acids (AA), lysine (Lys) and methionine (Met), decreased dry matter intake (DMI), milk yield (MY) and protein yield (MPY). The effect of balancing Lys (AjiPro®-L) and Met (Smartamine M®) supplies at Low (LP) or High (HP) levels of Protein (124 vs 148 g/kg DM of CP; 84.7 vs 94.2 g/kg DM of PDI) were investigated according a 2×2 factorial design on 40 Holstein dairy cows at 84±20 days in milk. They were assigned to a randomised complete block design in 4 groups of 10 cows for 5 weeks. Four corn silage diets (58.7% of DM) at 1.44 MCal/kg DM of net energy were offered ad libitum in which the SBM were incorporated at 2.5 vs 8.9% in HP vs LP diets, respectively. The levels of Lys and Met in % of PDI were at 6.1 and 2.0 in unbalanced AA (LM-) and at 7.0 and 2.3 in balanced AA (LM+) diets, respectively. Results were submitted to variance covariance analyses using the MIXED procedures of SAS including the effects of parity, PDI, AA profiles and interactions on the mean of weeks 3 to 5 (n=37). Increasing Lys and Met supply tended (P |
| Databáze: | OpenAIRE |
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