Suplementação energética de novilhas de corte submetidas a IATF e sua viabilidade econômica

Abstract

The energy supplementation of beef heifers analyzed in this work aims to measure the effect of protein supplementation in heifers in relation to the increase in pregnancy rate in fixed-time artificial insemination and its economic viability. The gain in the brood system in anticipating the exposure of females to reproduction makes the whole system profitable, the sooner the female becomes a matrix, the longer the lifespan for the system and greater profitability. The work design has as its starting point the comparison of two groups of 24-month-old heifers, the first group receiving energy supplementation plus mineral salt and the second group with only mineral salt, the initial costs start from the acquisition of the heifers over the price of market in the week of the experiment until the end of the supplementation with the IATF pregnancy diagnosis, re-evaluating the financial results with the updated price. The financial indicators were analyzed using: TMA (Minimum Attractive Rate); Payback (Time of Return on Investment); IRR (Internal Rate of Return), based on the interest rate for the TMA o Treasury Prefixed 2025. The average daily weight gain in the flushing strategy was positive in both group 1 and group 2, the pregnancy rate was also satisfactory being 40% and 50% respectively, however the result of economic viability for energy supplementation obtained a negative result. These results were obtained using the internal rate of return method defined as: the largest margin between the two groups. Such rate must be greater than the minimum rate of attractiveness to make the activity viable.