Chitosan and cottonseed processing method association on carcass traits and meat quality of feedlot lambs.

The objective of this study was to evaluate the effects of the association of cottonseed processing method with chitosan on carcass traits and meat quality of lambs finished in feedlot. Eighty lambs with an average body weight of 20.6 kg, with 04 months of age, were distributed in a completely randomized design, in a 2 x 2 factorial arrangement. The factors were represented by two cottonseed processing method (whole or ground) and two levels of chitosan (0 and 136 mg/kg BW). The association of cottonseed processing method with chitosan in the lamb diet did not affect (P>0.05) carcasses traits. The pH, color, cooking losses, shear force, and proximate composition of meat were also not affected (P>0.05) by the processing method of cottonseed or its association with chitosan in the lamb diets. There was an increase in palmitoleic (c9-C16:1; P = 0.01) and conjugated linoleic (P = 0.02) fatty acids when ground cottonseed was associated with chitosan. Ground cottonseed associated with chitosan increases the concentration of unsaturated fatty acids in the meat of feedlot lambs

Utilização de uréia no resíduo desidratado de vitivinícola associado à palma forrageira na alimentação de caprinos: consumo e digestibilidade de nutrientes Addition of urea to dehydrated vineyards residue, associated with forage cactus in goats feeding: intake and nutrient digestibility

Avaliou-se a influência da adição de 0; 0,5; 1 ou 1,5% de uréia no resíduo desidratado de vitivinícolas - utilizado em associação a palma forrageira na alimentação de caprinos - no consumo e na digestibilidade dos nutrientes. Foram utilizados 24 caprinos machos castrados, sem padrão racial definido, com peso vivo médio de 18 kg, distribuídos em blocos ao acaso, de acordo com o peso vivo. O período experimental foi de 20 dias: 15 para adaptação e 5 para coleta. A adição de teores crescentes de uréia ao resíduo desidratado de vitivinícola possibilitou aumento do consumo de matéria seca (MS), matéria orgânica (MO), proteína bruta (PB) e fibra em detergente neutro (FDN), expressos em kg/dia, %PV e em g/kgPV0,75. Observou-se consumo linear crescente de nutrientes digest��veis totais (NDT), carboidratos totais (CT) e carboidratos não-fibrosos (CNF), em %PV e g/kgPV0,75. Não houve diferença significativa nos consumos de NDT, CT e CNF expressos em kg/dia, cujos valores médios foram 0,363; 0,575 e 0,258, respectivamente. Entretanto, a adição de uréia ao resíduo não influenciou os coeficientes de digestibildade de MS, MO e FDN (médias de 48,13; 46,08 e de 20,37%, respectivamente). Os coeficientes de digestibilidade de CNF apresentaram crescimento linear, enquanto os de PB apresentaram comportamento quadrático, com valor máximo de 48,93%, com a adição de 1,3% de uréia ao resíduo. O uso de uréia no resíduo desidratado de vitivinícola elevou linearmente o consumo de nutrientes, contudo, o nível de 1,3% é o mais indicado, pois promove melhor digestibilidade da proteína bruta de dietas contendo esse alimento alternativo.<br>The effect of the addition of 0.0, 0.5, 1.0 and 1.5% of urea to dehydrated vineyards residue, associated to forage cactus palm in the feeding of goats on intake and nutrient digestibility was evaluated. Twenty-four castrated crossbred goats, without defined breed, with average 18 kg of BW were distributed to a randomized block design according to the body weight. The addition of increasing levels of urea to dehydrated vineyards residue increased intakes of dry matter (DM), organic matter (OM), crude protein (CP) and neutral detergent fiber (NDF), in kg/day, %BW and g/kg BW0.75. There was a linear increase intake of total digestible nutrients (TDN), total carbohydrates (TC) and non-fiber carbohydrates (NFC), in % BW and g/kg BW0.75. There was no difference in the intakes of TDN, TC and NFC, in kg/day, with means of 0.363, 0.575 and 0.258, respectively. However, the addition of urea to the residue did not affect the coefficients of digestibility of DM, MO and NDF, with means of 48.13, 46.08 and 20.37% respectively. The digestibility coefficients NFC showed linear increase, while CP showed quadratic behavior, with maximum at 48.93%, with the addition of 1.3% of urea to the residue. Use of urea in the dehydrated vineyards residue linearly increased the intake of nutrients, however, the level of 1.3% is the most appropriate, since promotes better digestibility of the crude protein of the diets containing this alternative feed