ANÁLISE ECONÔMICA DA CRIAÇÃO DE NOVILHAS LEITEIRAS EM PASTEJO ROTACIONADO, SOB DOIS SISTEMAS DE MINERALIZAÇÃO

Abstract

In order to assess the economic feasibility of the creation of dairy heifers system, recreated in rotational grazing Brachiaria, testing two types of mineral supplements, the experiment was carried out from september 2014 to february 2015, totaling 168 days, the Dairy Cattle Industry in Agricultural Sciences Center of the Federal University of Paraíba, located in Areia. We used an experimental area of 1.1 ha subdivided into 28 pickets divided into two blocks, using 16 animals, 8 in each group heifers, both received the same treatment except the mineral supplementation, where one group received mineral salt and other protein salt. When starting the experiment heifers averaged 12 months of age and 170 kg BW. They were evaluated 6 grazing cycles, and performed the economic evaluation of diets, considering the animal feeding cost (R$ / animal) and cost per unit area (R$ / ha). In the economic analysis considered the proportional costs of pasture establishment, taking into account the depreciated value of the materials used. The implementation cost of the experimental area was R$ 11,815.70, and the amount amortized for the six months was R$ 1,393.59. Heifers fed mineral salt had a gain of underweight another group from 43.59 to 56.63 kg / animal, respectively, with an average daily gain of 0.258 kg in animals that consumed mineral salt, while the group that consumed protein salt He managed an average daily gain of 0.337 kg. The amounts spent for each kilogram gain was R$ 1.85 for the animals fed mineralized salt and R$ 1.63 for the group that consumed protein salt. However, it was found that the group that consumed the protein salt had a better performance at lower cost.