Banca de DEFESA: RODRIGO SANTOS DE JESUS FALCÃO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RODRIGO SANTOS DE JESUS FALCÃO
DATE: 28/04/2023
TIME: 14:00
LOCAL: Escola de Medicina Veterinária e Zootecnia
TITLE:

Roughage Inclusion for beef cattle finishing high-grain diets

KEY WORDS:

intake, high grain, performance, production, nelore

PAGES: 50
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Nutrição e Alimentação Animal
SPECIALTY: Avaliação de Alimentos para Animais
SUMMARY:

The objective of the study was to evaluate three diets containing 0%, 2.5% and 5% roughage, offered to feedlot cattle in the finishing phase. 1800 male Nellore animals were used. Average daily gains, carcass yield and efficiency were calculated for all animals during and at the end of the experiment. The determination of the thermal well-being of the animals, as well as the production of enteric heat, were evaluated daily. No significant differences were observed (P<0.001). Finishing characteristics, loin eye area, fat thickness and rump fat thickness were obtained using the ultrasound technique. The levels of globulin, albumin, total proteins also showed no statistical difference (P<0.001). The levels of urea in the blood showed a linear increasing behavior, while the glycemia showed a quadratic behavior, reaching its highest value in the treatment containing 2.5%. The dry matter intake differed linearly in an increasing way (P<0.001), going from 10.34 kg of dry matter in treatment 1 to 11.88 kg in treatment 3. The average daily gain showed a linear increasing behavior (P<0.001) , treatment 1 had the lowest daily gain, around 1.34 kg; treatment 2 showed a gain of 1.5 kg, with treatment 3 showing the greatest gain, around 1.74 kg per day. The well-being index showed an increasing linear behavior between the forage levels tested. The number of standing animals photographed at 6 am, just before the feed was provided, showed a decreasing linear behavior, that is, the lower the level of roughage, the greater the number of standing animals. The temperature and humidity index showed statistical difference (P<0.001), showing higher values in September and in the interval from 11 to 16 hours. Regarding heat production, this characteristic presented a quadratic behavior, showing a statistical difference (P<0.001), that is, treatment 2 was the treatment that presented the highest production. Thus, the percentage of roughage in high-grain diets positively influence weight gain, consumption and well-being of feedlot cattle.

COMMITTEE MEMBERS:
Presidente - 1813193 - ANALIVIA MARTINS BARBOSA
Externo à Instituição - VICTOR REZENDE MOREIRA COUTO - UFG
Externo à Instituição - PEDRO VEIGA RODRIGUES PAULINO