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

Low doses of monensin for lambs fed diets containing high level of ground flint corn

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Author(s):
Daniel Montanher Polizel [1] ; André Storti Martins [2] ; Alexandre Arantes Miszura [3] ; Marcos Vinícius de Castro Ferraz Júnior [4] ; Analisa Vasques Bertoloni [5] ; Gabriela Bagio Oliveira [6] ; José Paulo Roman Barroso [7] ; Evandro Maia Ferreira [8] ; Alexandre Vaz Pires [9]
Total Authors: 9
Affiliation:
[1] Universidade de São Paulo. ESALQ. Depto. de Zootecnia - Brasil
[2] Universidade de São Paulo. FMVZ. Depto. de Nutrição e Produção Animal - Brasil
[3] Universidade de São Paulo. FMVZ. Depto. de Nutrição e Produção Animal - Brasil
[4] Universidade Federal do Amazonas. Depto. de Zootecnia - Brasil
[5] Universidade de São Paulo. FMVZ. Depto. de Nutrição e Produção Animal - Brasil
[6] Universidade de São Paulo. FMVZ. Depto. de Nutrição e Produção Animal - Brasil
[7] Universidade de São Paulo. FMVZ. Depto. de Nutrição e Produção Animal - Brasil
[8] Universidade de São Paulo. ESALQ. Depto. de Zootecnia - Brasil
[9] Universidade de São Paulo. ESALQ. Depto. de Zootecnia - Brasil
Total Affiliations: 9
Document type: Journal article
Source: Scientia Agricola; v. 78, n. 4 2020-07-08.
Abstract

ABSTRACT Two experiments were proposed to evaluate the addition of monensin for lambs fed diets containing a high level of mature ground flint corn. The experimental diets were as follows: no inclusion of monensin (M0) and inclusion of 8 (M8), 16 (M16) and 24 mg kg–1 of monensin (M24). In experiment 1, eight cannulated wethers were divided into a double 4 × 4 Latin square experimental design to evaluate nutrient digestibility, plasma parameters and rumen fermentation. The experiment lasted 112 days, divided into four periods of 28 days each. In experiment 2, ninety-two lambs were used in a randomized block design to evaluate the performance over 56 days. In experiment 1, doses of monensin had no effect on nutrient intake (p ≥ 0.07) and digestibility (p ≥ 0.09). There was a quadratic effect for acetate molar proportion (p = 0.01), acetate to propionate ratio (p = 0.04) and rumen pH (p < 0.01). However, there was no effect on the molar proportion of propionate and butyrate. The monensin decreased linearly the total SCFA concentration (p < 0.01). The inclusion of monensin increased glucose (p < 0.01) and decreased lactate concentration in plasma (p = 0.05). In experiment 2, monensin decreased dry matter intake (p = 0.04). However, there was a quadratic effect for average daily gain (p = 0.03) and feed efficiency (p < 0.01), with the greatest values observed for the M8 diet. Thus, the inclusion of 8 mg kg–1 of dry matter diet (DM) improves ruminal fermentation and plasma parameters, resulting in greater growth performance in lambs. (AU)

FAPESP's process: 18/07749-0 - HIGH-CONCENTRATE DIETS FOR LAMBS: STRATEGIES TO MAXIMIZE NUTRIENT ABSORPTION AND ANIMAL PERFORMANCE
Grantee:Evandro Maia Ferreira
Support Opportunities: Regular Research Grants