Efeitos da utilização de ácidos orgânicos em rações de frangos de corte

Abstract

This study aimed to evaluate the consequences of replacing growth promoter antibiotics by organic acids in diets of broilers. A completely randomized design was utilized, with 5 treatments (T1: negative control without antibiotics or organic acids; T2: latic, propionic and formic acids; T3: fumaric, formic, propionic and sorbic acids; T4: lactic, formic, fumaric and citric acids; T5: positive control, addition of antibiotic) and 7 replicates of 8 birds per experimental units. To evaluate de performance, the weight and feed intake were measured at different stages (1-21; 21-35; 35-42 day old). At 42 day old, 2 birds per pen were sacrificed with human methods to evaluate carcass yield, breast yield and leg yield. The results showed that organic acids have no influence on carcass yield and cuts. The performance should be better evaluated, because the experimental conditions don’t offer an enough environmental challenge for the additives (antibiotics and organic acids) can show their potential.

Natural Growth Promoters Replacing Traditional Growth Promoters in Diets for Light Replacement Pullets: A Systematic Approach

“…The formation of the three horizontal clusters (Figure 2): 1) symbiotic, negative and OA + S; 2) positive control and EO; and 3) organic acids and S+OE are probably justified by the similarity in their mode of action. Symbiotic and organic acids are similar in reducing pH, maintaining a healthy microbial balance in the gut and promoting intestinal integrity and immune health, selectively reducing colonization by pathogenic microorganisms such as E. coli, Salmonella and C. perfringens (Funari Junior et al, 2011;Jha Rajesh et al, 2020;Stefanello et al, 2020). The similarity of the positive control (antibiotic) with the essential oil is due to the effect that both have in limiting pathogenic bacteria in the intestinal lumen, increasing some beneficial microorganisms to the intestinal microflora (Toledo et al, 2007;Fernandes et al, 2014), and finally the association of organic and symbiotic acids + essential oil is due to the beneficial effects that these additives have in protecting the intestinal mucosa, which is responsible for the digestion and absorption processes, preventing microbial infections, acting in the bacterial cell, preventing its growth and multiplication (Zardo et al, 2015;Stefanello et al, 2020).…”