Banca de QUALIFICAÇÃO: OSMAN LUIZ ROCHA FRITZ

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : OSMAN LUIZ ROCHA FRITZ
DATE: 06/12/2023
TIME: 11:20
LOCAL: Web Conferência - Google Meet: meet.google.com/cym-bqcs-vot.
TITLE:

Alternative to the use of monensin in feedlot beef cattle diets.

KEY WORDS:

Acidosis, aditives, essential oils, finishing.

PAGES: 45
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUMMARY:

Cattle, like other ruminants, have adapted to forage consumption throughout evolution. Thus, the ruminal microbiota has become a diverse ecosystem specialized in the disintegration of this type of food. Composed of bacteria, protozoa, fungi and yeast capable of fermenting structural carbohydrates. As productivity is sought in livestock farming, it is common to use high-energy diets. These allow good weight gain rates, but generate acidification of the ruminal environment. To the point that the physiological mechanism is unable to stabilize the pH, which creates a risk to productivity and to the animal in cases of ruminal acidosis. There are mechanisms that can shape the contribution pattern for adequate digestion in these cases. The use of essential oils as a digestion-enhancing additive may be an alternative. Its use comes in response to pressure from some parts of society that request a reduction in the use of antibiotics in animal production, as in the case of the use of sodium monensin, widely used as an additive in finishing diets. The project evaluated the zootechnical performance of 12 Brangus breed standard animals with an average age of 9 months and an average live weight of 309.91 kg, confined individually in stalls with two types of diet: the standard one consisting of corn silage plus commercial feed with 15% in the proportion 41:59 and; standard diet including essential oil compounds, provided twice a day. The experiment began on July 4, 2023 in the experimental confinement of Campus –Araquari. Animals were weighed monthly with a 12-hour fasting period. The performance of the animals was evaluated by the average daily weight gain (ADG; kg/day), calculated by weighing the animals individually every thirty days. Food consumption per animal was recorded daily by weighing the feed provided and leftovers from the previous day. Feed conversion was obtained by the quotient between food consumption per animal and total live weight gain. The data were subjected to the Shapiro-Wilk normality test and analysis of variance considering the treatment variables and the period as a fixed effect and the animal as a random effect. Initial weight was used as a covariate. All analyzes were carried out using the R program, with a significance level of 5%. There was no effect of treatments for any zootechnical variable. The end of the trial period will be December 2023.

COMMITTEE MEMBERS:
Presidente - 1760760 - CARLOS EDUARDO NOGUEIRA MARTINS
Interno - 2613308 - DELANO DIAS SCHLEDER
Interna - 1046884 - ELIZABETH SCHWEGLER
Interno - 1810731 - JULIANO SANTOS GUERETZ
Interno - 1755182 - MARIO LETTIERI TEIXEIRA
Interna - 2408296 - SORAYA REGINA SACCO