Evaluación de dos sistemas de crianza en la etapa de levante de pollitas lohmann brown

Abstract

In the poultry program of the Faculty of Animal Sciences of the ESPOCH, an evaluation of two rearing systems (photoperiod and cage) in the laying period of Lohmann Brown pullets was performed, in comparison with a control rearing (floor), applying three treatments with 5 repetitions and a total of 15 experimental units, under a Completely Randomized Design. The result inferred that rearing systems evaluated do not have statistical influence in the productive performance of birds from day old to 6 weeks, but for the amount of food consumed was higher in rearing in floor (0.86kg). In the development phase (7-12 weeks), there were significant differences only for the ambient temperature reaching the ideal treatment when applying T2 to 16, 64°C calorie range. To compare the three systems of rearing in the laying period there are significant differences for feed conversion, being more efficient in applying the photoperiod (1.78), as for the room temperature (16,26°C). Economic evaluation infers higher returns using the photoperiod (T2), at a cost of 1, 36 profits. So it is recommended to work the Lohmann Brown pullets' replacement with a system initially in the ground and then the photoperiod since recorded an efficient food conversation.