Desempenho de bovinos de corte em campo nativo diferido, suplementados com sal mineral proteinado durante o período de estação fria: uma simulação

Abstract

The native area has adequate forage value in the hot season, and during the cold season, production and quality are affected, causing loss of weight for the grazing animals, one way to change this situation is through supplementation with protein salt. Based on this objective was to evaluate, through simulations, the performance of beef cattle on native pastures deferred, supplemented with protein and mineral supplement during the cold season, through Interruptible sequences in order to measure the profitability arising from the supplementation.The work was developed in Vensim software. The four scenarios were used: SM - and mineral supplement; S2I - protein salt supplementation during the first two months of cold season S2F - protein salt supplementation during the final two months of cold season S4M - protein salt supplementation during four months of winter. For the composition of the work was done with a batch of 51 animals for the SM scene, and 64 animals for the other scenarios, getting an initial placement adjusted 0.8 AU and 1 AU respectively. So much for the simulation where the animals were not adapted to the protein salt as for the simulation where there has been prior to the protein salt adaptation scenario S4M was obtained more PVF and setting the lowest SM. The forage intake was higher in both S4M scenario. The SM was the scenario with the highest residual forage mass for both simulations. The analysis of profitability in the simulation for the bulls is not adapted to the protein salt S2I pointed out that the scenario, had lower earnings when compared to other scenarios, the scenario is what made S2F higher gross margin during the cold season. In the simulation found that calves that were previously adapted to the stage S4M protein salt obtained the highest gross margin. The simulation of protein supplementation showed that the use of this supplement can be an important tool to aid in the management of rangelands.