Were measured: milk production, SCC, MUN, NEFA, BHB, glucose, cholesterol, insulin, cortisol, T4 and T3. 46 lactating Holstein cows were divided into four treatments: protected niacin (GN), yeast rich in chromium (GCr), niacin+chromium (GNCr) and control (GC). The purpose of this study was to evaluate the effect of protected niacin and yeast rich in chromium on the productive and metabolic performance of dairy cows under thermal stress. E-mail: University of Santa Cruz do Sul (UNISC), Santa Cruz do Sul, RS, Brazil.ģ- University of Western Santa Catarina (UNOESC), Xanxerê, SC, Brazil.Ĥ- Federal Institute Farroupilha (IFFar), Frederico Westphalen, RS, Brazil.ĥ- Federal Institute Farroupilha (IFFar), Alegrete, RS, Brazil.Ħ- University of Passo Fundo (UPF), Passo Fundo, RS, Brasil.ħ- Federal University of Southern Border (UFFS), Realeza, PR, Brazil. Marta Lizandra do Rego Leal 1*, Adelina Rodrigues Aires 2, Silvana Giacomini Collet 3, Cláudia Medeiros Rodrigues 1, Marceli Pazini Milani 4, Diego Zeni 5, Thirssa Helena Grando 4, Carlos Bondan 6, José Laerte Nörnberg 1, Maiara Garcia Blagitz 7ġ*- Department of Large Animal Clinic, Federal University of Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brazil. Efeito da niacina protegida e da levedura rica em cromo em vacas leiteiras sob estresse térmico – produção de leite e parâmetros metabólicos. Effect of protected niacin and chromium-rich yeast in dairy cows under thermal stress – milk production and metabolic parameters.
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