Aditivo enzimático em dietas para frangos de corte na forma física farelada e peletizada

Abstract

An experiment was carried out to evaluate the inclusion of an enzymatic complex in rations in mash and pellet form, with valorization of metabolizable energy, calcium and phosphorus, and its effects on performance, blood biochemical parameters, intestinal morphometry, bone characteristics, acid profile Cecal volatile fatty acids, carcass yield and cuts of broiler chickens from 1 to 42 days of age. A total of 1320 Cobb 500 dayold male broiler chicks were distributed in a completely randomized design. The experimental treatments were organized in a 3x2 factorial scheme with three experimental diets (positive control (PC) formulated to meet the nutritional requirements of the birds; negative control (CN) with an enhancement of 100 kcal kg1 , 15 percentage points for calcium and phosphorus; NC plus the addition of 200g kg1 of the enzymatic complex (Allzyme® SSF), and two physical forms of feed (meal and pelleted). There was interaction between those studied for feed conversion (CA) in all periods Also, for the AC, an effect (P<0.05) of the diet was found, both in the mash and pelleted rations. When provided in the mash form, the animals that received the CP diet had better AC compared to those that received the diets CN and CN+Enz. However, when supplied in pelleted form, the AC of the animals that received the CP and RCN+AE diets was better when compared to the birds that received the CN diet. The pelleted feed increased (P<0.05) the weight final (PF), weight gain (GP), res bone strength, seeder index, mineral matter, carcass and breast yield. The inclusion of theenzymatic complex improved (P<0.05) the PF and GP of the birds in relation to the CN, after 21 days. There was no difference (P>0.05) between diets for bone characteristics, cecal volatile fatty acid profile, and carcass and cut yield. It is concluded that the addition of the enzymatic complex in the pelleted diet, with enhancement of the nutritional matrix, provides positive effects on the performance of broilers from 1 to 42 days old. Also, the pelleting of the feed improves bone characteristics, increases the levels of protein biochemical parameters in the whey and the carcass yield of the birds.