Consumo de matéria seca em bovinos de corte em confinamento no sudeste do Pará.

Abstract

This study was conducted to describe the dry matter intake (DMI) by finishing cattle in southeastern Pará and to evaluate the ability to predict consumption by the equations of the BR CORTE 2016 system. Data collection was carried out in a commercial feedlot located in the municipality of Curionópolis, Pará, Brazil, with a static capacity for 8,000 animals. Data from 17 lots with an average of 170 bovines, males, Nellore and Nellore crossbreds, not castrated, with an average initial weight of 399 ± 17.28 were used. The CMS estimates predicted by the BR CORTE system were obtained according to the equations as a function of the genetic groups (zebu, dairy crosses, and beef crosses). The observed dry matter intake data were based on daily through readings, performed before the first treatment of the day was supplied. The data were analyzed graphically using the R software and performance metrics were calculated using the Model Evaluation System software. The average daily DMI observed for the animals was 11kg/day, 7.3, 5.4 and 5.9% higher than the predictions of the BR CORTE 2016 system (10.20, 10.41 and 10.35 kg/day, according to the equations presented for zebu, beef crossbreds and dairy crossbreds, respectively). It is concluded that the models of the BR cut system underestimate the dry matter intake for cattle under the conditions evaluated in the present study.