Pastos y Forrajes (Sep 2012)
Evaluación de una mezcla probiótica en la alimentación de gallinas ponedoras en una unidad de producción comercial Evaluation of a probiotic mixture on laying hens feeding in a commercial farm
Abstract
Con el objetivo de evaluar el efecto de la inclusión, en la dieta de gallinas ponedoras, de una mezcla probiótica (biopreparado) a base de las cepas Lactobacillus salivarius C65 y Bacillus subtilis E44, se realizó una investigación en la granja de ponedoras "Baró Chiquito" del municipio Limonar, Matanzas, entre junio y julio de 2011. El diseño fue completamente aleatorizado y se evaluaron dos tratamientos: T1) dieta basal (control) y T2) dieta basal más la mezcla de biopreparados, en proporción 1:1. Se utilizaron 2 078 gallinas ponedoras L33, con una edad entre 40 y 48 semanas (1 039 aves por tratamiento), las cuales se alojaron en jaulas metálicas y recibieron agua y alimento a base de maíz-soya. Los huevos se recogieron cada día y se determinó el número total de posturas y el de huevos por ave por semana, el consumo de alimento y la conversión en posturas por kilogramo de alimento consumido. Los animales que recibieron la mezcla probiótica tuvieron una mayor producción en todo el periodo, excepto en la semana 40, en la que no se manifestó diferencias entre tratamientos. Hubo diferencias (PIn order to evaluate the effect of including, in the diet of laying hens, a probiotic mixture (biopreparation) based on the strains Lactobacillus salivarius C65 and Bacillus subtilis E44, a study was conducted at the "Baró Chiquito" laying hen farm of the Limonar municipality, Matanzas, between June and July, 2011. The design was completely randomized and two treatments were evaluated: T1) basal diet (control) and T2) basal diet plus the mixture of biopreparations, in a 1:1 ratio. A total of 2 078 L33 laying hens were used, with an age between 40 and 48 weeks (1 039 fowls per treatment), which were housed in metallic cages and received water and feed based on corn-soybean. The eggs were collected every day and the total number of egg-layings and eggs per hen per week, feed intake and conversion into eggs per kilogram of feed consumed were determined. The animals that received the probiotic mixture had higher production throughout the period, except in week 40, in which no differences were shown among treatments. There were differences (P<0,05) in the laying percentage, favoring the treatment with the probiotic mixture, and also regarding the variation of the egg number per hen per week (P<0,01). It is concluded that it is possible to use this biopreparation for feeding laying hens, because 10% more laying occurred than in the control, and also positive indicators of conversion into egg per kilogram of feed were obtained.
