Efeito do nível dietético de FDN de cana-de-açúcar sobre o desempenho de novilhas Holandesas

Paulo Celso da Silva Gallo; Marcos Neves Pereira; Giuliano Pavani de Campos; Sarita Bonagurio Gallo

doi:10.5433/1679-0359.2019v40n2p947

Authors

Paulo Celso da Silva Gallo Nutron, Cargill Animal Nutrition Brasil http://orcid.org/0000-0002-2480-1449
Marcos Neves Pereira Universidade Federal de Lavras http://orcid.org/0000-0002-9809-0395
Giuliano Pavani de Campos Nutron, Cargill Animal Nutrition Brasil http://orcid.org/0000-0002-1744-4834
Sarita Bonagurio Gallo Faculdade de Zootecnia e Engenharia de Alimentos, Universidade de São Paulo http://orcid.org/0000-0001-7584-4548

DOI:

https://doi.org/10.5433/1679-0359.2019v40n2p947

Keywords:

Behavior, Growth, Digestibility, Nutrition.

Abstract

This study aimed to evaluate the effects of increasing the neutral detergent fibers (NDF) concentration of sugarcane-based diets on the growth and development of Holstein heifers. Twenty-seven Holstein heifers with a mean body weight of 265.5 ± 36.4 kg were housed in a sand bedded tie stall and fed individually. The experimental diet consisted of fresh sugarcane and concentrate. Three concentrations of sugarcane NDF were compared: 33% (SC33), 38% (SC38), and 42% (SC42). Crude protein content of experimental diets was 16%. The following parameters were evaluated: dry matter intake, weight gain and morphometric measures, digestibility, feeding behavior, and ruminal pH. The experimental design was a randomized block and all analyses were performed using the MIXED procedure in SAS. Intake of DM decreased as NDF concentration increased (p=0.07), but weight gain and growth were not significantly affected (p=0.74). As dietary NDF increased, chewing activity per unit DM intake increased (p=0.001), but rumen pH was not significantly affected (p=0.91). Diets formulated with 330?420 g of sugarcane NDF/kg of dry matter were sufficient to support the growth of Holstein heifers.

Author Biographies

Paulo Celso da Silva Gallo, Nutron, Cargill Animal Nutrition Brasil

Pesquisador, Nutron, Cargill Animal Nutrition Brasil, Campinas, SP, Brasil.

Marcos Neves Pereira, Universidade Federal de Lavras

Prof., Universidade Federal de Lavras, UFLA, Lavras, MG, Brasil.

Giuliano Pavani de Campos, Nutron, Cargill Animal Nutrition Brasil

Pesquisador, Nutron, Cargill Animal Nutrition Brasil, Campinas, SP, Brasil.

Sarita Bonagurio Gallo, Faculdade de Zootecnia e Engenharia de Alimentos, Universidade de São Paulo

Profª, Faculdade de Zootecnia e Engenharia de Alimentos, Universidade de São Paulo, USP, Pirassununga, SP, Brasil.

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