Effect of organic sources of minerals on fat-corrected milk yield of dairy cows in confinement
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Data
2015-03-01
Autores
Del Valle, Tiago Antonio
Jesus, Elmeson Ferreira de
Paiva, Pablo Gomes de
Bettero, Vitor Pereira
Zanferari, Filipe
Acedo, Tiago Sabella [UNESP]
Monteiro Tamassia, Luis Fernando [UNESP]
Renno, Francisco Palma
Título da Revista
ISSN da Revista
Título de Volume
Editor
Revista Brasileira Zootecnia Brazilian Journal Animal Sci
Resumo
This study evaluated the effects of organic and inorganic sources of minerals in diets for mid-lactation dairy cows on milk yield and composition, intake and total apparent digestibility of dry matter and nutrients, blood parameters, microbial protein synthesis, and energy and protein balances. Twenty Holstein cows averaging 146.83 +/- 67.34 days in milk and weighing 625.30 +/- 80.37 kg were used. The experimental design was a crossover. Diets were composed of corn silage (50%), ground grain corn, and soybean meal, differing with regard to the sources of trace minerals, plus an organic and inorganic mix. The organic mineral source increased milk fat and fat-corrected milk yield without changing milk yield, intake, or total apparent digestibility. Blood parameters, microbial protein synthesis, and energy and protein balances were not affected by the sources of minerals. Organic sources of minerals improve milk fat yield without affecting other parameters.
Descrição
Palavras-chave
Holstein, Milk fat, Mineral nutrition, Organic mineral
Como citar
Revista Brasileira De Zootecnia-brazilian Journal Of Animal Science. Vicosa-mg: Revista Brasileira Zootecnia Brazilian Journal Animal Sci, v. 44, n. 3, p. 103-108, 2015.