Acceso usuarios
Aldenamar Cruz Hernández, Jesús Cámara-Acosta, Alfonso Chay Canul, Adelaido Rafael Rojas García, Joel Ventura Ríos, Santiago Ramírez Vera
Con el objetivo de evaluar el desempeño de corderas Pelibuey alimentadas con diferentes niveles de proteína y pasto Tanzania a dos régimen de pastoreo rotacional. Se utilizó un diseño completamente al azar. Se utilizaron 30 corderas de la raza Pelibuey con peso vivo inicial de 20.33 ±1.56 kg, que se distribuyeron en 30 corrales de 2.5 m de largo x .80 m de ancho y en una pradera de 1.5 ha divididas en 0.25 ha. Los animales se alimentaron a las 07:00 am y a las 16:00 pm. Con dietas que contenían 10, 12, 14, 16 %PC y un alimento testigo, las corderas se agruparon y pastorearon en praderas a dos intensidades de 9-11 cm y 13- 15 cm de altura residual. Se avaluaron materia seca (MS), tasa de crecimiento (TC), análisis bromatológico del pasto y ganancia de peso. La mayor acumulación de MS y TC se obtuvieron en los meses de junio y julio. La altura residual de 9-11 cm presentó el mayor contenido de proteína cruda (PC) y fibra detergente neutro (FDN). Los valores mayores en la ganancia de peso se obtuvieron en corderas que pastaron en praderas a una altura residual de 9-13 cm y que se suplementaron con alimento con 14 y 16% de PC. El pasto Tanzania presentó buena producción de MS y componentes morfológicos a una intensidad de 13-15 cm. En tanto que las corderas que se alimentaron con 16% PC en la ración presentaron las mayores ganancia diaria de peso.
With the objective of evaluating the performance of Pelibueylambs fed with different levels of protein and Tanzania grass at two rotational grazingregimes. It was used completely random design. Were used 30 ewes of the Pelibueybreed with an initial live weight of 20.33±1.56 kg, which were distributed in 30pens of 2.5 m long x 0.80 m wide and in a 1.5 ha pasture divided into 0.25 ha. Theanimals were fed at 07:00 am and at 16:00 pm. With diets containing 10, 12, 14,16% CP and a control feed, the lambs were grouped and grazed in pastures at twointensities of 9-11 cm and 13-15 cm of residual height. Were evaluated dry matter(DM), growth rate (TC), bromatological analysis of the pasture and weight gain. Thehighest accumulation of MS and TC were obtained in the months of June and July.The residual height of 9-11 cm presented the highest content of crude protein (CP)and neutral detergent fiber (NDF). The highest values in weight gain were obtainedin lambs that grazed in pastures at a residual height of 9-13 cm and that weresupplemented with food with 14 and 16% CP. The Tanzania grass presented goodDM production and morphological components at an intensity of 13-15 cm. Whilethe lambs that were fed 16% CP in the ration presented the highest daily weightgains.
