Agroindustrial residues as fruits in diets of sheep feedlot

Esta pesquisa foi conduzida com o objetivo de se avaliar a utiliza??o dos res?duos de abacaxi (Ananas comosus L.), banana (Musa sp.), manga (Mangifera indica) e maracuj? (Passiflora ssp.), na alimenta??o de ovinos confinados e abatidos aos 32 quilos de peso vivo. Foram utilizados vinte e cinco ovinos mesti?os Santa In?s. O per?odo experimental foi de 94 dias, sendo 10 dias de adapta??o. As dietas tiveram uma rela??o de 40:60 e foram isoprot?icas e isoenerg?ticas. Os tratamentos foram constitu?dos pela substitui??o de 75% da silagem de sorgo por res?duos das frutas, sendo o tratamento controle composto apenas por silagem de sorgo. Avaliou-se o consumo, desempenho e durante o 30? ao 34? dia experimental, foi realizado coleta total de fezes, com a utiliza??o de bolsas coletoras, a fim de avaliar a digestibilidade. As ra??es fornecidas, sobras e fezes foram amostradas para an?lises. O experimento foi conduzido em delineamento inteiramente casualizado. As m?dias foram comparadas usando teste de Tukey, com n?vel de probabilidade de 5%. N?o houve efeito de dietas sobre o desempenho animal, medidas corporais, rendimentos de carca?a e cortes, e qualidade de carne de cordeiros confinados. A inclus?o dos res?duos de banana e manga reduziu o consumo da fibra em detergente neutro, corrigida para cinza e prote?na, em porcentagem do peso vivo (P0,05) das dietas sobre medidas corporais, rendimentos de carca?a e cortes e caracter?sticas da carne de cordeiros confinados. Assim, a utiliza??o dos res?duos industriais na alimenta??o de cordeiros em sistema de confinamento apresentou se como uma alternativa vi?vel, j? que a utiliza??o dos res?duos de abacaxi, banana, manga e maracuj? ao n?vel de 75% de substitui??o na mat?ria seca, ? silagem de sorgo,os produtos n?o afetaram significativamente as vari?veis analisadas.Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG)Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq)Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013.ABSTRACT This research was conducted with the objective to evaluate the use of waste from pineapple (Ananas comosus L.), banana (Musa sp.), Mango (Mangifera indica) and passion fruit (Passiflora spp.) In diets for feedlot sheep slaughtered at 32 pounds of body weight. Were used twenty-five Santa In?s crossbred sheep. The experimental period was 94 days and 10 days of adaptation. All diets had a ratio of 40:60 and were isonitrogenous and isocaloric. The treatments consisted of the replacement of 75% of sorghum silage by residues of fruits, and the control treatment consisting only of sorghum silage. Evaluated the consumption, and performance during the 30th to 34th day experiment was conducted with total fecal collection using collection bags to assess digestibility. The diets provided, orts and feces were sampled for analysis. The experiment was conducted in a completely randomized design. Means were compared using Tukey's test with a probability level of 5%. There was no effect of diet on animal performance, body measurements, carcass and cuts, and meat quality of feedlot lambs. The inclusion of waste banana and mango reduced intake of neutral detergent fiber corrected for ash and protein percentage of body weight (P <.05). The digestibility of neutral detergent fiber corrected for ash and protein was lower for treatments with passion fruit (28.89%) and mango (36.33%) compared to the control (53.54%). The low digestibility of neutral detergent fiber corrected for ash and protein found in the present study may be explained by the different composition of this fraction in the waste and for being largely composed of fiber added to the concentrate diet (60% of dry matter consumed).As soon as the animals reached 32 kg immediately before slaughter evaluated the biometric measurements. The slaughter was conducted in the slaughter room as the animals reached 32 kg live weight after fasting for 16 hours solid. Then evaluated morphometric measures, quantitative traits: weight and hot carcass yield, cold carcass, half carcass and yields: neck, palette, shank, rib, loin; qualitative characteristics of meat cuts: the pH, color (L, a, b, chroma and Ho), cooking loss, water holding capacity, and shear force and body measurements. Means were compared using Tukey's test with a probability level of 5%. There was no effect of diets on the body measurements, carcass and cut yields, and meat quality in confined lambs. In conclusion, the inclusion of fruit residues from agroindustry in diet of lambs in feedlot system presents as a viable alternative, since the utilization of these residues in substitution of sorghum silage did not significantly affect the analyzed variables