Blend enzimático em dietas para leitões na fase de creche

Abstract

With the aim of improving nutrient digestibility, the use of exogenous enzymes can also provide nutritional and/or energy increase in diets for piglets. The objective was to evaluate the addition of an enzyme blend to diets for piglets in two trials regarding the digestibility of feed nutrients, performance, occurrence of diarrhea and intestinal morphometry. In both trials, 4 treatments were used: CON- control feed; RED5- feed with a 5% reduction in energy level, RED2.5%+blend- ration with a 2.5% reduction in energy level and addition of an enzymatic blend; RED5+blend- ration with 5% reduction in energy level and addition of enzyme blend. For the digestibility test, 16 castrated male pigs aged 50 days were housed in metabolic study cages, using the total feces and urine collection method. The addition of an enzymatic blend with a 2.5% energy reduction results in higher digestibility coefficients for dry matter, ether extract, mineral matter, neutral detergent fiber and acid detergent fiber. For the performance test, 64 castrated male piglets aged 21 days were used, distributed among 4 treatments with 8 replications each. From 33 to 42 days of age, it was observed that piglets fed diets with the addition of an enzyme blend showed similar feed conversion compared to those fed the control. Between 43 and 70 days of age, piglets that received diets with the addition of an enzyme blend and reductions of 2.5% in the energy level of the diet showed similar feed conversion to animals that received the control diet. Animals that received food with an enzyme blend showed greater villus height in the duodenum compared to animals fed control food and with a 5% reduction without enzyme supplementation. Animals that received feed containing an enzyme blend showed higher villus height, lower crypt depth and a better villus/crypt ratio compared to those fed with feed with a 5% reduction in energy level without the addition of enzyme blend. The inclusion of an enzymatic blend allows a reduction of up to 2.5% in the energy level of diets without compromising the performance of piglets in the nursery phase and results in better parameters of intestinal morphometry of the duodenum and jejunum of piglets.