Uso de lisolecitina de soja para frangos de corte alimentados com dietas contendo diferentes fontes de óleo vegetal.

Abstract

The modem poultry industry increasingly requires innovations in the field of poultry nutrition. In this respect, can highlight the use of lipids as a source of dietary energy incorporated into the feed, being represented by fats and oils. Dietary lipids enters the gastrointestinal tract in the form large particles coagulated, is emulsified by bile salts to facilitate the transport of fatty acids by intestinal aqueous médium in the form of micelles. Exogenous emulsifiers have been used to facilitate the digestion and absorption of lipids, as an example, can cite the soybean lysolecithin. This research treats on the use of soybean lysolecithin emulsifier to broilers. Chapter I contextualizes the physiological aspects of digestion, absorption and metabolism of lipids in birds; the role of lipids in nutrition of broilers (vegetable oils, specifically palm oil and soybean oil), and the use of emulsifiers (soybean lecithin and lysolecithin) in poultry. Chapter II is about the experiment carried out in which was used 1040 one day broilers, 13 males and 13 females in each box, totaling 40 boxes were distributed in a completely randomized design with 2x2 factorial, organized as follows: diets with soybean oil and palm oil, being the same with and without the addition of emulsifier soybean lysolecithin. The performance was estimated for the accumulating periods of 7, 14, 21, 28, 35 and 42 days old (for body weight, daily weight gain, feed intake, feed conversion ratio and viability, and at 42 days, the Productive Efficiency Ratio). The carcass yield, abdominal fat and weight of digestivo and immune organs were estimated on 42nd day old (males). Before slaughter (at 42 days),4ml of blood was collected for measurement of cholesterol and triacilglicerol leveis.