Análisis de indicadores de rendimiento biológico y económico en la producción de dos híbridos de pollos de engorde alimentados con tres alimentos comerciales (ING)

Abstract

A total of 180 day-old, straight-run chicks. 90 of hybrid H1 and 90 of hybrid H2 were distributed according to 2x3 factorial arrangement of treatments in a complete randomized design. The experiment was divided in two periods: starting (4 weeks) and finishing (3 weeks). For each period a specific commercial feed was used. Water and feed were supplied ad libitum. Weight gain and feed intake were measured weekly. The treatments were combinations of each hybrid (H1, H2) with each feed (A1, A2, A3). Weight gain, feed intake and feed conversion were evaluated.

In both periods there were no significative differences (P≥0.05) between treatments in weight gain. The largest weight gain in the starting period was obtained in treatment H2 A2 and in finishing period in treatment H1 A1. Regarding to feed intake there were significative differences (P≤0.05) between treatments but only in the starting period. The birds fed with A1 feed showed less intake than the ones fed with the other two feeds. The lowest feed intake in both periods was in treatment H1 A1.

There were no significative differences (P≥0.05) between treatments in feed conversion either. The best feed conversion in the starting period was in treatment H2 A1 and in the finishing in treatment H1 A1.

The economic analysis shows that treatment H1 A1 had the higher cost per kg produced, and treatment H2 A1 the higher variable costs, followed by treatment H1 A1. Treatment H2 A3 obtained the largest economic yield in terms of profit/cost relation and marginal return rate, showing, in addition, the higher profit per colon invested. It was proven that the chemical composition of the feed reported by the feed producers was significatively different from the proximate analysis we carried out at our laboratory.