FATTENING OF L35 PIGS FED ON EITHER CEREALS OR SUGAR CANE MOLASSES | CEBA DE DISTINTOS CERDOS L35 CON CEREALES O MIELES DE CAÑA DE AZUCAR

espagnol; castillan. Se seleccionaron 60 lechonas de los cruces Hampshire x L35 y Duroc x L35 y otras 30 lechonas L35 de los centros genéticos del país. Se alojaron en corrales individuales y se separaron al azar en dos grupos de 15 animales por cada combinación tipo genético y dos dietas. Una de cereales y la otra de miel rica y nuprovim. La prueba comenzó a los 25 kg y terminó a un peso aproximado de 100 kg. Al no haber interacciones significativas en las características estudiadas se analizaron los efectos de cruce y dieta por separado. Las diferencias entre las dietas se manifestaron fundamentalmente en la conversión alimentaria y en el consumo de alimentos, ya que las ganancias de peso no fueron significativamente diferentes. Las medias para ganancia diaria fueron 780 g para los cereales y 765 g para la dieta de nuprovim, respectivamente, con consumos de 2.80 y 3.43 kg/día (P0.05) de alimento y conversiones de 3.31 y 3.76 kg MS/kg de aumento (P0.05) en cada dieta respectivamente. Al tener los cerdos F1 un 50% de genes del L35, las diferencias entre ellos y los L35 fueron menores que las observadas cuando se compararon las razas puras que dieron origen a estos cruces. Los resultados de este trabajo indican que las diferencias en el comportamiento de las dietas de cereales o miel y nuprovim se deben al mayor consumo que los cerdos realizan de esta última, debido posiblemente a su menor contenido de materia seca y a su menor concentración energética.

anglais. A performance trial was conducted with sixty female piglets from the Hampshire x L35 and from Duroc x L35 were obtained from Cuban genetic centres. The animals were housed in individual pens and were allotted at random into two groups of 15 animals each per every combination of genotype and diets, based either on cereals and grains or high test molasses and a protein, vitamins and minerals supplement, nuprovim. The trial commencement was when the animals had 25 kg and finished when the pigs attained 100 kg live weight kg. Since there were not significant differences (P0.05) in the interaction genotype x diet, the effects were analyzed separately. Differences between both diets were mainly evident for feed conversion and feed intake, since daily gains were not significantly different per treatment. Means for daily gain were 780 and 765 g for the diets based on cereals or high test molasses respectively, with values for feed intake of 2.80 and 3.43 kg/day (P0.05), whereas feed conversion accounted for 3.31 and 3.76 kg DM/kg gain (P 0.05). Since F1 pigs had 50% L35 genes, differences among them and those evaluated L35 were lesser than those observed when pure breeds originating these crosses were compared. Results from the present trial indicate that differences in performance traits due to diets based on either cereal or high test molasses are due to a greater feed intake of pigs consuming the latter, possibly due it lesser dry matter content and energetic concentration.