Título:	By products replacing ground corn for dairy cows rotationally grazing elephant grass: milk yield and composition.
Autoria:	MARTINEZ, J. C. CONGIO, G. F. de S. COSTA, D. F. A. GUERREIRO, P. VOLTOLINI, T. V. BITTAR, C. M. M. SANTOS, F. A. P.
Afiliação:	JUNIO CESAR MARTINEZ, MATO GROSSO STATE UNIVERSITY GUILHERMO FRANCKLIN DE SOUZA CONGIO, UNIVERSIDADE DE SÃO PAULO DIOGO FLEURY AZEVEDO COSTA, UNIVERSIDADE DE SÃO PAULO PEDRO GUERREIRO, CENTRAL QUEENSLAND UNIVERSITY TADEU VINHAS VOLTOLINI, CPATSA CARLA MARIS MACHADO BITTAR, UNIVERSIDADE DE SÃO PAULO FLÁVIO AUGUSTO PORTELA SANTOS, UNIVERSIDADE DE SÃO PAULO.
Ano de publicação:	2025
Referência:	Archivos Latinoamericanos de Producción Animal, v. 33, n. 4, p. 185-197, 2025.
Conteúdo:	This study investigated the effects of different by products used as feedstuffs to replace ground corn for supplementing Holstein dairy cows rotationally grazing intensively managed elephant grass. Five experiments were conducted to evaluate various levels of pelleted citrus pulp (PCP), corn gluten feed (CGF), whole cottonseed (WCS), wheat middlings (WHM), and soybean hulls (SBH) as alternatives to ground corn in iso proteic and iso energetic supplements. The experiments followed a Latin square design and assessed blood and performance parameters such as milk yield (MY) and milk composition. Blood parameters were not affected (p > 0.05) by any by products. The inclusion of PCP, CGF and SBH up to 75 %, and WHM up to 50 % in place of corn did not affect (p > 0.05) either MY or milk composition. However, replacing the inclusion of ground corn at the level of 75 % of WCS resulted in a significant reduction (p < 0.05) in yields of milk, 3.5 % fat corrected milk, protein, and milk solids, along with an increase (p < 0.05) in milk urea nitrogen. Results obtained suggest that the replacement of ground corn by PCP, CGF and SBH up to 75 % and WHM and WCS up to 50 % in the supplement have no adverse short term effects on MY and composition in Holstein cows grazing intensively managed elephant grass.
Thesagro:	Forragem Pastagem Capim Elefante
NAL Thesaurus:	Coproducts Forage quality Holstein Tropical pastures
Palavras-chave:	Parâmetros sanguíneo Co-produtos Qualidade da forragem Pastagens tropicais Vacas leiteiras
ISSN:	1022 1301
Digital Object Identifier:	https://doi.org/10.53588/alpa.330401
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPATSA)