Physicochemical characteristics of lamb meat fed with cottonseed associated with calcium lignosulphonate

The physicochemical characteristics of the meat from lambs fed diets containing whole or disintegrated cottonseed, associated or not with calcium lignosulfonate (LignoCaSO3), were evaluated. Thirty non-castrated Dorper x Santa Inês lambs, with an average of 24.9 ± 3.6 kg and four months of age were confined for 60 days in collective stalls and distributed in a completely randomized design with six replications. After slaughter, by means of contrasts, the averages of the parameters of the semimembranous and semitendinosus muscles were analyzed. The cottonseed increased cooking loss and ash, and reduced muscle weight, water holding capacity and red intensity. The disintegration of the cottonseed reduced the shear force in diets without LignoCaSO3, increased the protein and the loss by cooking and reduced the pH in the diets with the additive. The luminosity values increased with the disintegration of the cottonseed in diets with and without LignoCaSO3. The addition of LignoCaSO3increased the weight of the muscle, protein, ash, pH, shear strength and the intensity of red. Moisture, lipids and yellow intensity were not influenced by the diets. Even changing the physical-chemical characteristics, the cottonseed with or without LignoCaSO3does not change the quality of the meat.(AU)

Effect of the diet on performance characteristics and quality of meat fat of lamb by principal component analysis

The objective of this study was to evaluate the effect of use of agroindustrial co-products in the diet of lambs on the performance and nutritional quality of meat fat. Twenty lambs were distributed into four experimental groups: control diet (C) or diets containing cottonseed (CS), sunflower meal (SFM), and castor cake (CC). During the experimental period, data on dry matter consumption (DMC) and total weight gain (TWG) were collected. After slaughter, samples of Logissimus dorsi (LD) muscle were taken for fatty acids and cholesterol analysis. Diets C and CS provided similar characteristics of fat quality and animal performance. However, SFM and CC diets tend to form isolated groups, with different fat and performance characteristics. The SFM diet results in meat with a higher saturated fatty acids and cholesterol content. The CC diet is related to improved performance characteristics and lower cholesterol content. In conclusion, the inclusion of CC in the experimental diets provided, in the proportions used in this experiment, better characteristics of animal performance and meat fat quality.(AU)

Effect of the diet on performance characteristics and quality of meat fat of lamb by principal component analysis

The objective of this study was to evaluate the effect of use of agroindustrial co-products in the diet of lambs on the performance and nutritional quality of meat fat. Twenty lambs were distributed into four experimental groups: control diet (C) or diets containing cottonseed (CS), sunflower meal (SFM), and castor cake (CC). During the experimental period, data on dry matter consumption (DMC) and total weight gain (TWG) were collected. After slaughter, samples of Logissimus dorsi (LD) muscle were taken for fatty acids and cholesterol analysis. Diets C and CS provided similar characteristics of fat quality and animal performance. However, SFM and CC diets tend to form isolated groups, with different fat and performance characteristics. The SFM diet results in meat with a higher saturated fatty acids and cholesterol content. The CC diet is related to improved performance characteristics and lower cholesterol content. In conclusion, the inclusion of CC in the experimental diets provided, in the proportions used in this experiment, better characteristics of animal performance and meat fat quality.

Consumo, Produção e Composição do Leite de Vacas Mestiças Alimentadas com Bagaço de Mandioca (Manihot esculenta, Crantz)

Com objetivo de avaliar o efeito da inclusão de diferentes níveis (0, 5, 10 e 15%) de bagaço de mandioca à dieta de vacas leiteiras, foram distribuidas 12 vacas mestiças Holandês x Zebu (composição racial variando de » a ¾ de sangue H x Z) em três Quadrados Latinos 4 x 4. Os animais apresentaram, em média 478,5 kg de peso corporal e estavam com 100 a 150 dias de lactação no início do período experimental. Foram avaliadas a produção e a composição do leite e o consumo dos nutrientes. Foi fornecida silagem de capim-elefante como fonte de volumoso. As relações volumoso:concentrado utilizadas foram de 65,19:34,81; 61,59:38,41; 59,08:40,92 e 54,76:45,24. As dietas foram formuladas para serem isoprotéicas e isoenergéticas. Verificou-se aumento de 13,2% na produção de leite no tratamento com 15% de inclusão de bagaço de mandioca. Não houve diferença nos teores de gordura, lactose e sólidos totais do leite, encontrando-se diferença significativa no teor de proteína. Houve aumento linear do consumo de matéria seca, matéria orgânica, proteína bruta, carboidratos totais, carboidratos não-fibrosos e nutrientes digestíveis totais, efeito quadrático no consumo de extrato etéreo e redução do consumo de fibra em detergente ácido, enquanto que o consumo de fibra em detergente neutro foi estatisticamente semelhante em todos os tratamentos. Concluiu-se que o bagaço de mandioca pode ser utilizado até o nível de 15% de inclusão na dieta total, sem alterar a composição do leite, promovendo aumento na produção e gerando 47,02% a mais de lucro parcial