Organic acids, essential oils and symbiotic in semi-heavy laying hen diets: productive performance and economic analysis

Abstract

RESUMO -Objetivou-se com esse experimento avaliar os efeitos dos ácidos orgânicos, óleos essenciais e de um simbiótico, em substituição aos antimicrobianos (promotores de crescimento) sobre o desempenho, qualidade de ovos e viabilidade econômica da produção de poedeiras comerciais semipesadas. Foram utilizadas 240 poedeiras Hy-Line Brown, às 32 semanas de idade, com peso médio 1,650 ± 0,034 kg, em um delineamento inteiramente casualizado, com quatro tratamentos de dez repetições cada. O experimento teve duração de 140 dias, divididos em cinco períodos. Foram empregados os seguintes tratamentos: tratamento 1 -controle negativo (sem promotor de crescimento); tratamento 2 -controle positivo (com promotor de crescimentoVirginiamicina); tratamento 3 -Ração basal + ácidos orgânicos + óleos essenciais; e tratamento 4 -Ração basal + simbiótico. Não houve efeito significativo dos tratamentos sobre as variáveis: consumo de ração, produção, peso dos ovos, massa de ovos, conversão por massa de ovos e conversão por dúzia de ovos (P > 0,05). Concluise que a associação de ácidos orgânicos e óleos essenciais, e o simbiótico, podem substituir os promotores de crescimento sem alterar o desempenho e a qualidade dos ovos de poedeiras comerciais semipesadas. O uso de simbiótico na dieta (T5) proporciona uma maior margem bruta quando comparado com os demais tratamentos. Palavras-Chave:Aditivos; Extratos herbais; Mananoligossacarídeos; Prebiótico; Probiótico.ABSTRACT -This experiment was carried out in order to evaluate the effects of organic acids, essential oils and symbiotic as antimicrobial (growth promoters) replacements on performance, egg quality and economic viability of semi-heavy laying hens production. A total of 240 Hy-line Brown layers hens at 32 weeks of age and with an average weight of 1.650 ± 0.034kg were distributed in a completely randomized design with four treatments containing six replicates each one. The experiment lasted 140 days and was divided into five periods. The following treatments were employed: treatment 1 -negative control (without growth promoter); Treatment 2 -positive control (with growth promoter -virginiamycin); Treatment 3 -basal ration + organic acids + essential oils; and treatment 4 -basal ration + symbiotic. There were no significant effects of treatments on the variables feed intake, egg production, egg weight, egg mass, conversion by egg mass, and conversion per dozen eggs (P > 0,05). It was concluded that the combination of organic acids, essential oils and symbiotic can replace growth promoters without changing the performance and quality of semi-heavy laying eggs. The use of symbiotic in diet provide a higher gross margin when compared to the other treatments.

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

“…In addition, these growth promoters, symbiotics, organic acids and essential oils, alone or in combination, provide similar results to those obtained with conventional promoters, and can be used in the diet of birds to replace them in all breeding stages, including in rearing with replacement pullets, optimizing performance, bone characteristics, the development of digestive and reproductive organs (Ribeiro et al, 2010;Bastos-Leite et al, 2016;Vasconcelos et al, 2016). Thus, the use of these additives will provide efficient digestion and absorption of nutrients, ensuring better maturation of the birds' reproductive organs, as well as the crests and development of the sternum, ensuring high productivity (Jardim Filho et al, 2011;WANG et al, 2019).…”