Extrato pirolenhoso como aditivo na ração de codornas europeias criadas em dois tipos de cama

Abstract

Cutting coturniculture has become a highly promising activity in the country, making it necessary to search for alternatives to reduce costs, optimizing meat production together with sustainability. For example, the use of pyrolignose extract (EP), which is a product that acts as a natural performance enhancer because it contains in its composition phenolic compounds, aldehydes and ketones that have bactericidal, antifungal and antioxidant properties. The objective of this study was to evaluate the performance, carcass yield and economic viability of European quails housed in two types of litter (new and used) supplemented with pyroligneous extract. The experiment was conducted using 400 shear quails from 1 to days, distributed in a completely randomized design in a 5x2 factorial scheme, with five levels of pyrolignous extract (0.0, 1.0, 40 1.5, 2.0 and 2.5%) and two types of bed, totaling 10 treatments and 4 replicates, 10 birds per experimental unit, housed in pits. The birds were weighed at the beginning and at the end of the experimental period to evaluate the performance parameters (weight gain (GP), feed intake (CR) and feed conversion (CA)). At the end of the experimental period, 8 birds of each treatment were slaughtered for carcass evaluation (carcass yield (CR) and body weight). The economic analysis of the utilization of PE in the ration was also performed through ration cost calculations, effective operating coefficient, gross revenue, gross margin of the effective operating coefficient, effective operating profit and profitability index. There was an interaction effect between PE and bed type on CR. The levels of PS supplementation used in the diets did not influence the performance variables of birds housed in a new bed. For quails housed in bed used, a decreasing linear effect was observed for CR and CA and increasing linear effect for GP. A better CR was observed for birds housed in a new bed when compared to those housed in a used bed. For birds housed in bed used, the RC showed quadratic effect with a better level of 2.5%. There was an interaction effect between EP and bed type for gizzard weight, where the non-EP diet of the birds housed in bed used presented a higher weight of this organ, for other body weights and economic analysis, the inclusion of PE in the diet did not influence these parameters. It is therefore recommended that up to 2.5% of the pyroligneous extract be included in the European quail ration from 1 to 42 days old regardless of the type of litter used at breeding.