Crossbred pigs were used from 21 to 150 days of age (LM 100×Pietrain)of both sexes,between 5.92-6.05 kg/body weight.They were divided into four treatments: T1 without inclusion; Prebiotics T2 4 kg/ton of feed (Saccharomyces cerevisiae )Probiotics T3 0.8 kg/ton feed(Lactobacillus spp,Bifidobacterium spp).T4 + Probiotics and Prebiotics 4 kg +0.8 kg/t feed respectively (Saccharomyces cerevisiae)+ (Lactobacillus spp,Bifidobacterium spp,(additive effect).T3 and T4 consumed 253.74 and 249.65 kg/ food,the average for the four treatments was 250.86 kg the additive effect of T4 (P<0.05 )compared to other treatments,with a feed conversion of 2.49 kg of feed consumed per 1 kg of body weight gained,T2 and T3 were 2.51 and 2.50 kg of food consumed per 1 kg of body weight gained,and T1 had lower achievement.s greater weight gain presented T4 with 101.79 kg,an increase of 3.82% compared to T1,with a final weight of 97.90 kg.for T1,T2,and T3 and T4,there were 5,2,2 and 0 respectively.Regarding the channel quality and behavior of the meat,the control had the better performance compared to the other treatments.was concluded that the addition of the prebiotics and probiotics had no positive effect.Economically greater benefit is obtained by using(4 kg/t of prebiotics +0.800 kUt of probiotics in food).which has a marginal return of 7.5∶1.
Méndez-Mendoza Maximino Saltijeral-Oaxaca Jorge A Espinosa-Cervantes Román Córdova Jiménez Cristian Alejandro Juárez-Mosqueda María de Lourdes Castro-Colambres Gabrie Cansino-Arroyo Gerardo López-Naranjo José Isabel Méndez-Hernándes William Sánchez-Aparicio Pedro Olivares-Pérez Jaime Huerta-Crispín Rubén Guerra-Liera Eulogio Villa-Mancera Abe Méndez-Palacios Néstor Vázquez-Flores Felicitas Méndez-Palacios Netzi Naidí Córdova Izquierdo Alejandro Xolalpa Campos Víctor Manuel Ruiz-Lang Claudio Gustavo
Facultad de Veterinaria,Benemérita Universidad Autónoma de Puebla,México Departamento de Producciòn Agrícola y Animal,Universidad Autónoma Metropolitana,Unidad Xochimilco,Ca AIM IB(E)RICA Leóon,Espa(n)a Departamento de Morfología.FMVZ-UNAM Facultad de Veterinaria.Benemérita Universidad Autónoma de Puebla,México División Académica de Ciencias Agropecuarias,Universidad Juárez Autónoma de Tabasco,Carretera Villah Universidad Autónoma de Guerrero-Unidad Académica de Medicina Veterinaria y Zootecnia;km.3.0 carr.Na Facultad de Agronomìa.Universidad Autónoma de Sinaloa,México