REPLACEMENT OF CORN SILAGE BY CHOPPED SUGARCANE PLUS WHOLE COTTONSEED ON RUMINAL PARAMETERS, MICROBIAL PROTEIN PRODUCTION, AND NUTRIENT DIGESTIBILITY IN LACTATING COWS

Authors

  • Alexandre Vaz Pires ESALQ/USP
  • Ivanete Susin ESALQ/USP
  • José Manuel Corrêa de Simas ELANCO Saúde Animal
  • Flávio Augusto Portela Santos ESALQ/USP
  • Clayton Quirino Mendes ESALQ/USP
  • Reinaldo Cunha de Oliveira Junior UEG
  • Juliano José de Rezende Fernandes UFG
  • Rafael Canonenco de Araujo ESALQ/USP

DOI:

https://doi.org/10.5216/cab.v9i1.3660

Keywords:

Nureição de ruminantes, vacas leiteiras

Abstract

Five multiparous Holstein cows averaging 525.91 kg BW and 85 days in milk were assigned in a 5 x 5 Latin square to evaluate the effects of corn silage replacement by sugarcane plus whole cottonseed. Cows were cannulated in the rumen and proximal duodenum and were fed a 50:50 concentrate:forage diet (DM basis). Treatments were defined by the replacement of corn silage by chopped sugarcane (whole plant) plus whole cottonseed in the following proportions: 100:0 (control); 75:25; 50:50; 25:75; 0:100 in the DM basis. Dry matter intake (DMI) of cows fed 100, 75, and 50% corn silage diets was higher (P<0.05) than DMI of cows fed 25 and 0% corn silage. Ruminal degradability and total tract digestibility of neutral detergent fiber and acid detergent fiber were not affected (P>0.05) by treatment diets. Total digestibilities of crude protein in diets containing up to 50% of sugarcane were lower than in diets containing 75 or 100% of sugarcane. Ruminal ammonia concentration decreased (P<0.05) with sugarcane and whole cottonseed inclusion. Concentrations of acetic, propionic and butyric acids as well as total volatile fatty acids concentration were higher (P<0.05) with sugarcane inclusion up to 50% level. Corn silage can be replaced by sugar cane plus whole cottonseed up to 50% level of forage in the diet without negative effect on nutrient utilization by dairy cows producing up to 18 kg milk/day. KEY WORDS: Digestibility, NDF, volatile fatty acid.

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Published

2008-04-03

How to Cite

PIRES, A. V.; SUSIN, I.; SIMAS, J. M. C. de; SANTOS, F. A. P.; MENDES, C. Q.; OLIVEIRA JUNIOR, R. C. de; FERNANDES, J. J. de R.; ARAUJO, R. C. de. REPLACEMENT OF CORN SILAGE BY CHOPPED SUGARCANE PLUS WHOLE COTTONSEED ON RUMINAL PARAMETERS, MICROBIAL PROTEIN PRODUCTION, AND NUTRIENT DIGESTIBILITY IN LACTATING COWS. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 9, n. 1, p. 50–58, 2008. DOI: 10.5216/cab.v9i1.3660. Disponível em: https://revistas.ufg.br/vet/article/view/3660. Acesso em: 22 nov. 2024.

Issue

Vol. 9 No. 1 (2008)

Section

Animal Production

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