Utilización de aceites vegetales en piensos de terneros cebados según sistema de alimentación pienso y paja: rendimientos productivos y calidad de la carne tras su maduración

La carne de vacuno se ha considerado siempre como un alimento muy apreciado, con un alto valor nutritivo. Sin embargo, contiene altas cantidades de grasa rica en ácidos grasos saturados. Como consecuencia, en los últimos años ha aumentado el interés en producir carne con un perfil de ácidos grasos más saludable desde el punto de vista de la salud humana. El sistema de cebo de terneros más utilizado en España consiste en dietas a base de concentrados ricos en cereales, y paja de cereales como forraje. Como consecuencia, la carne presenta una relación en PUFA/SFA (P/S) desfavorable para el consumidor en relación a la que presentan los animales criados en sistemas extensivos que consumen pasto. La presente tesis doctoral se llevó a cabo con el objetivo principal de estudiar la posible mejora en el perfil lipídico de la carne de terneros cebados en el sistema de alimentación pienso y paja, al incluir en las dietas aceites vegetales con distinto grado de saturación. Su efecto sobre los rendimientos productivos, la calidad de la carne y su evolución durante la maduración. Además, mediante la aplicación de la tecnología NIRS se establecieron ecuaciones de predicción para estimar el perfil de ácidos grasos de la grasa intramuscular, así como diferentes parámetros de la composición química de la carne..

Feeding Agroindustrial Byproducts to Light Lambs: Influence on Growth Performance, Diet Digestibility, Nitrogen Balance, Ruminal Fermentation, and Plasma Metabolites

The objective of this study was to evaluate the effect of replacing cereals and protein concentrates in a high-cereal concentrate (control) for light lambs with corn distiller’s dried grains with solubles (DDGS; 18%), dried citrus pulp (DCP; 18%), and exhausted olive cake (EOC; 8%) in a byproduct (BYP) concentrate on growth performance, digestibility, ruminal fermentation, and plasma metabolites. Two homogeneous groups of Lacaune lambs (13.8 kg ± 0.25 kg) were fed one of each concentrates and barley straw ad libitum until reaching about 26 kg body weight. There were no differences between groups on feed intake, average daily gain, or feed conversion ratio, but the control diet had greater (p < 0.001) dry matter digestibility. Diet had no effect on post-mortem ruminal pH and total volatile fatty acid concentrations and profile, but NH3-N concentrations were lower (p = 0.003) for the BYP-fed group compared with the control one. However, plasma concentrations of amino acids, total proteins, urea, and hepatic enzymes were not affected by the diet. In conclusion, 44% of feed ingredients in the concentrate for light lambs can be replaced with a mixture of corn DDGS, DCP, and EOC without negatively affecting growing performance and animal health

Animal performance and meat characteristics in steers reared in intensive conditions fed with different vegetable oils

Enhancing the quality of beef meat is an important goal in terms of improving both the nutritional value for the consumer and the commercial value for producers. The aim of this work was to study the effects of different vegetable oil supplements on growth performance, carcass quality and meat quality in beef steers reared under intensive conditions. A total of 240 Blonde D’ Aquitaine steers (average BW=293.7±38.88 kg) were grouped into 24 batches (10 steers/batch) and were randomly assigned to one of the three dietary treatments (eight batches per treatment), each supplemented with either 4% hydrogenated palm oil (PALM) or fatty acids (FAs) from olive oil (OLI) or soybean oil (SOY). No differences in growth performance or carcass quality were observed. For the meat quality analysis, a steer was randomly selected from each batch and the 6th rib on the left half of the carcass was dissected. PALM meat had the highest percentage of 16:0 (P<0.05) and the lowest n-6/n-3 polyunsaturated fatty acids (PUFA) ratio (P<0.05), OLI had the highest content of t11-18:1 (P<0.01) and c9,t11-18:2 (P<0.05) and SOY showed the lowest value of monounsaturated fatty acids (MUFA) (P<0.001), the highest percentage of PUFA (P<0.01) and a lower index of atherogenicity (P=0.07) than PALM. No significant differences in the sensory characteristics of the meat were noted. However, the results of the principal component analysis of meat characteristics enabled meat from those steers that consumed fatty acids from olive oil to be differentiated from that of steers that consumed soybean oil.Depto. de Producción AnimalFac. de VeterinariaTRUEpu

Information and Communication Technologies (ICT) for training in sheep handling and production

El desarrollo de TIC para el aprendizaje de los alumnos es de suma importancia en la situación actual. Se pretende el desarrollo de material audiovisual para que la adquisición de las competencias en materia de manejo, cría y producción ovina.Depto. de Producción AnimalFac. de VeterinariaFALSEsubmitte

From farm to commercialization: An integration strategy in Food Science and Technology

De la Granja a la Comercialización: Una experiencia de integración. Comunicación presentada en el III Congreso CyTA-Junior. Zaragoza. 20 de junio de 2022Integración de la Granja Docente de Veterinaria en las actividades prácticas del Grado en Ciencia y Tecnología de los Alimentos; creación de una plataforma virtual como herramienta de coordinación de la producción-elaboración y comercialización de productos.Integration of the Veterinary Teaching Farm in the practical activities of the degree in Food Science and Technology; creating a virtual platform as a tool to coordinate the production, manufacture and marketing of food products.Fac. de VeterinariaFALSEsubmitte