Composição tecidual das carcaças de cordeiros terminados com dieta contendo quitosana

Abstract

The objective of this study was to evaluate a regional and technical composition of the palette of carcasses of feedlot lambs with increasing levels of chitosan. Twenty four Suffolk x Texel crossbred lambs aged 4 ± 0.5 months, average weight 20 ± 5 kg 437 were housed in individual individuals for 70 days (preceded by 16 days of adaptation as facilities). The experimental design was randomized blocks based on weight. The lambs were distributed in two controls: 1) Control - without additive and 2) Chitosan: 3g / day, both tops being administered with a sample of the protein mixture. The reduced diet at 08: 00h and 13: 00h had a roughage: concentrate ratio of 15:85, where roughage was obtained from Cynodon spp. (15%), or concentrate composed of rehydrated corn grain silage (66%), a mineral protein blend (19%) of ground soybean blend and mineral blend. Slaughter time was predefined at 70 days. After 24 hours of refrigeration as carcasses were sectioned longitudinally to half and half left carcass for measurements and half right carcass to perform commercial cuts, and the palettes were dissected to quantify a tissue composition of the cuts. The tissue composition of the palette was not affected by the addition of chitosan in the diet.