Ácidos orgânicos e compostos fenólicos microencapsulados em dietas para galinhas poedeiras

Abstract

Organic acids and phenolic compounds are used in bird nutrition to maintain intestinal health by regulating the presence of pathogens and improving intestinal morphology, consequently the use of nutrients. The objective of this study was to evaluate the effect of supplementation of organic acids and microencapsulated phenolic compounds in laying hen diets. The experiment was conducted at the Ovo Novo farm, using a total of 600 laying hens of the Novogen Brown line from 30 weeks of age distributed in a completely randomized design with six treatments, 10 replications with 10 birds each. The treatments were: control diet, 200AD1: 200g/t of additive 1, 500AD1: 500g/t of additive 1, 200AD2: 200g/t of additive 2, 500AD2: 500g/t of additive 2 and AD3: 500g/t of additive 3. The performance of the birds, the quality of the eggs, the pH of the organs, the weight of the organs and coelomic fat and intestinal histomorphometry were evaluated. Treatment means were compared using the Student Newman-Keuls (SNK) test at 5% probability. Supplementation with the additives improved egg production, egg weight, shell thickness, coelomic fat weight, absorptive area of the duodenum and jejunum (500AD2). Lower coelomic fat weight, lower shell thickness and more intense yolk color (AD3) and higher egg weight (200AD1). The supplementation of organic acids and microencapsulated phenolic compounds at a dosage of 500g/t of AD2 in the diets of laying hens proved to be more effective in maintaining zootechnical performance, egg quality, organ development and intestinal morphology.