Suplementação Mineral em Fêmeas de Corte

Abstract

The mineral supplementation is essential for cattle, whether they are grazing or confined. This importance is due to the lack of some minerals lead to the reduction of the performance of the animal, either by the fall in production, reduction of reproductive performance or in extreme cases, death. In Brazil, most pastures are degraded, and they can not meet the daily mineral requirements of cattle. Therefore, these animals need a daily mineral supplement, so they can meet their requirements. One of these minerals is phosphorus, having an extremely important role in bone development (fetus and growth) and maintenance of the bovine bone structure, besides being secreted in milk. In this way, the present study provided an injectable phosphorus- based supplementation (Fosfosal®), with subcutaneous 15 ml being administered on day 0 (D0) of an ovulation synchronization protocol and IATF in parturient cows, aiming at an improvement in fertility, reduction of reproductive problems and consequently reducing the discard rate. After 30 days of insemination, ultrasound evaluation was performed to diagnose gestation and in the (D100) another evaluation was performed to calculate gestational loss. The analyzes were submitted to the homogeneity and homoscedasticity test by guided analysis of SAS 9.3. The GLIMMIX proc was used to evaluate the validity of the model and when significance was detected, Tukey and lsmeans tests were used to compare means. Although there was no statistical difference in the diagnosis at 30 days (treated 52% (195/375) vs Control 49% (188/384) and at diagnosis at 90 days (Traded 50% (188/375) vs Control 46% (177 / 384), it is reported that Fosfosal® supplementation may improve the reproductive performance of lactating dairy cows.