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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effects of energy sources and inclusion levels of concentrate in sugarcane silage-based diets of finishing Nellore young bulls: Feeding behaviour, performance and blood parameters

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Author(s):
Ferrari, V. B. [1] ; Consolo, N. R. B. [1] ; Sousa, R. T. [1] ; Souza, J. M. [1] ; Santana, M. H. A. [2] ; Silva, L. F. P. [3]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Sch Vet Med, Dept Anim Sci, 225 Duque de Caxias Norte, BR-13635900 Pirassununga, SP - Brazil
[2] Univ Sao Paulo, Coll Anim Sci & Food Engn, Dept Vet Med, 225 Duque de Caxias Norte, BR-13635900 Pirassununga, SP - Brazil
[3] Univ Queensland, 306 Carmody Rd, Bld 80, St Lucia, Qld 4072 - Australia
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF AGRICULTURAL SCIENCE; v. 157, n. 4, p. 350-356, MAY 2019.
Web of Science Citations: 0
Abstract

Replacing ground maize (GM) with steam-rolled maize typically increases feed efficiency in maize-silage-based diets. However, little is known about optimal carbohydrate supplementation in sugarcane silage-based diets. The objective was to quantify the effect of partially replacing GM with steam-rolled maize (SRM) or pelleted citrus pulp (PCP) at two concentrate levels (600 or 800 g/kg DM) in sugarcane-based diets on feeding behaviour, performance and blood parameters of finishing Nellore bulls. One hundred and eight young bulls were allocated to 36 pens in a randomized block design and fed for 84 d. Feeding 800 g/kg concentrate decreased time spending eating and ruminating, but improved G:F ratio, hot carcass weight and carcass dressing, compared to 600 g/kg concentrate. Bulls fed SRM and PCP diets with 600 g/kg concentrate had lower intake compared to GM. Both final weight and average daily gain decreased when bulls were fed PCP and SRM with 600 g/kg concentrate compared to GM diets, and when fed with PCP and 800 g/kg concentrate. Substituting PCP for GM decreased gain efficiency, carcass weight, rumination time and intake efficiency, indicating that the bulls consumed less feed per hour spent eating. Substituting SRM for GM increased backfat thickness and blood urea concentration. In conclusion, the replacement of GM with PCP reduces intake and enhances selection against large particles, decreasing rumination, performance and final carcass weight and dressing. Replacement of GM with SRM increases blood urea and fat deposition, with no impact on performance. (AU)

FAPESP's process: 12/12125-0 - Effect of sources of non fiber carbohydrates on intake, body gain, carcass characteristics, rumen kinetics and ecosystem of finishing bulls
Grantee:Luis Felipe Prada e Silva
Support type: Regular Research Grants