Evaluación de la harina de hoja de morera ( Morus alba ) en la alimentación de pollos de engorda

Two experiments were conducted to evaluate the effect of including mulberry leaf flour (MLF) in broiler feeding. For the first trial 480 male chickens of one day (ISA MPK) were randomly distributed in four treatments with different feeding flour levels 0 (M0), 4 (M4), 8 (M8) and 12% (M12) and six replicates (n= 20). A lineal (P<0,05) decrease in body weight as leaf flour increased was observed (2725, 2617, 2482, 2375 g; in M0, M4, M8 y M12, respectively) and a quadratic effect (P<0,05) in consumption, has be the inflection point on M8. Wherever, the conversion had a similar response to consumption. Gastrointestinal tract and closed gizzard close weight was greater (P<0,05) in chickens with 12% of MLF and intermediate with 8%. Carcass yield was 11 % greater in control group. The second trial consisted in the evaluation of true digestibility (TD) in vivo. The digestibility of MLF was 32,18% and 17,88% to dry matter and crude protein, respectively. We concluded that levels of 4% of MLF negatively affect the growth and carcass yield of the chicken; however it can included at 8% in the diet of chicken over 35 days old. The TD of the protein is low in MLF.Con la finalidad de evaluar el efecto de la inclusión de la harina de hoja de morera (HHM) en la dieta para pollos de engorda, se realizaron dos experimentos; en el primero se utilizaron 480 pollitos machos (ISA MPK) de un día de edad los cuales fueron distribuidos al azar en 4 dietas (tratamientos) con base a la inclusión del 4 (M4), 8 (M8) y 12% (M12) de HHM y un testigo (M0), con 6 repeticiones (n= 20). Se observó una disminución lineal (P<0,05) en el peso corporal (49 días) a medida que se incrementó la HHM (2725, 2617, 2482, 2375 g; para M0, M4, M8 y M12, respectivamente) y un efecto cuadrático (P<0,05) en el consumo, siendo el punto de inflexión en M8. El peso del tracto gastrointestinal y molleja cerrada fue mayor (P<0,05) en el tratamiento M12 e intermedio en M8. Tanto el perímetro del muslo como el rendimiento de la canal fueron 11% mayores (P