Organic acids in diets of pigs

Author(s)

Marco Monteiro de Lima

• Document type: Doctoral Thesis
• Press: Jaboticabal. 2016-03-14.
• Institution: Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal
• Defense date: 2016-01-29
• Advisor: Maria Cristina Thomaz

Abstract

The objective was to evaluate the effects of using a mixture (Blend) of organic acids (acetic acid 147,00 g/kg; citric acid 8.55 g/kg; formic acid 245.00 g/kg; lactic acid 133.65 g/kg; phosphoric acid 137,75 g/kg and calcium 137.00 g/kg) in the diets of pigs from 21 to 64 days of age and from 65 to 150 days of age on performance, digestibility of diets, the rate of passage of the diets, the incidence of diarrhea, morphophysiological and microbiological characteristics of the digestive system and carcass quality and meat. For this, two experiments were conducted, being the first used 96 piglets weaned at 21 ± 1 days old, and the second used 36 pigs with 29.38 ± 3.13 kg. The animals of the two experiments were distributed according to a randomized block design, the first composed of four treatments, eight replicates and three animals per experimental unit, while the second was composed of 4 treatments, 9 replicates and one animal per experimental unit. The 4 treatments for each experiment were in agreement with the inclusion of 0; 0.15; 0.30 and 0.45 Blend. All data were subjected to analysis of variance and orthogonal polynomials were conducted to determine the linear, quadratic and cubic effects, using the Proc Mixed procedure. In the first experiment it was observed that the Blend was not able to prevent and or retrieve dysfunctions generated by the small intestine after weaning period. Not noticed, too, any productive improvement of animals in the nursery phase, from 21 to 64 days old. In the second experiment there was an increasing linear effect for pH24h in Longissimus muscle and quadratic effect on digestbilidade coefficients of dry matter and gross energy, with the best results with the addition of 0.17 and 0.18% of the blend, respectively, however these changes did not result in improvements in performance, carcass quality and meat. Therefore, the blend does not generate any effect that justifies their use for nursery pigs, growing and finishing. (AU)

• FAPESP's process: 12/16562-5 - BLEND OF ORGANIC ACIDS AND FATTY ACIDS IN DIETS OF PIGS
• Grantee: Marco Monteiro Lima
• Support Opportunities: Scholarships in Brazil - Doctorate