Efeito da inclusão de milho probiotado na dieta de vacas Girolando sobre a produção e composição do leite

Lays Aparecida Simplício Vieira Silva; Rafael  Monteiro Araújo Teixeira; Maria Isabela Moreira Silva; Lorrany Fernandes Faria; Yane Vitória da Silva; Gabriel Vasconcelos Coelho Rezende

doi:10.1590/1809-6891v26e-80023E

Autores

Lays Aparecida Simplício Vieira Silva Instituto Federal Sudeste de Minas Gerais, Campus Rio Pomba (IF SUDESTE MG), Rio Pomba, Minas Gerais, Brasil https://orcid.org/0009-0003-4597-6525
Rafael Monteiro Araújo Teixeira Instituto Federal Sudeste de Minas Gerais, Campus Rio Pomba (IF SUDESTE MG), Rio Pomba, Minas Gerais, Brasil https://orcid.org/0000-0002-8443-8020
Maria Isabela Moreira Silva Universidade Federal de Viçosa (UFV), Viçosa, Minas Gerais, Brasil https://orcid.org/0000-0002-3940-2475
Lorrany Fernandes Faria Instituto Federal Sudeste de Minas Gerais, Campus Rio Pomba (IF SUDESTE MG), Rio Pomba, Minas Gerais, Brasil https://orcid.org/0009-0007-4830-2824
Yane Vitória da Silva Instituto Federal Sudeste de Minas Gerais, Campus Rio Pomba (IF SUDESTE MG), Rio Pomba, Minas Gerais, Brasil https://orcid.org/0009-0007-6757-3099
Gabriel Vasconcelos Coelho Rezende Instituto Federal Sudeste de Minas Gerais, Campus Rio Pomba (IF SUDESTE MG), Rio Pomba, Minas Gerais, Brasil https://orcid.org/0009-0006-3681-3048

DOI:

https://doi.org/10.1590/1809-6891v26e-80023E

Resumo

O objetivo deste estudo foi avaliar a influência da utilização do milho probiotado na dieta de vacas leiteiras. Foram utilizadas doze vacas Girolandas, com peso médio de 549 ± 66 kg, produção média de 22,8 ± 4,8 kg de leite/dia, as quais foram distribuídas em três quadrados latinos (3x3). O experimento foi composto de três tratamentos, três períodos experimentais, com duração de quinze dias cada. Os animais receberam dieta controle com silagem de milho, concentrado de 22% de proteína bruta, acesso a piquetes de forrageiras tropicais, e, para os demais tratamentos, foi adicionado à dieta controle 0,5 kg e 1,0 kg de milho probiotado com base em matéria seca. Os dados de produção e composição do leite e comportamento ingestivo foram submetidos à análise de variância, adotando-se nível de significância de 10%, avaliados em delineamento em quadrado latino utilizando regressão para avaliação de médias. A adição de milho probiotado à dieta proporcionou crescimento linear na produção de leite. O peso vivo e escore de condição corporal não apresentaram diferença significativa com a inclusão do milho probiotado. Os teores de sólidos totais, proteína e gordura do leite aumentaram linearmente. O milho probiotado diminuiu o tempo em ócio e aumentou o tempo de ruminação quando adicionado à dieta. Não houve crescimento de leveduras no período de incubação do milho probiotado. Em relação à análise econômica, a adição de 0,5 kg de milho probiotado à dieta mostrou um saldo positivo. Conclui-se que a utilização do milho probiotado demonstrou-se viável técnica e economicamente com 0,5 kg animal/dia.

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