Banca de QUALIFICAÇÃO: GIOVANI FREDERICO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : GIOVANI FREDERICO
DATE: 03/12/2021
TIME: 14:00
LOCAL: Web Conferência - Google Meet (meet.google.com/xzj-fecs-daj)
TITLE:

Use of a natural source of vitamin C to mitigate heat stress on the productive and reproductive performance of lactating swine females.

KEY WORDS:

Heat stress, oxidative stress, ambience, antioxidant vitamins.

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

The seasonality present in Brazil has a great impact on swine production resulting in large economic losses. The modern female swine has high prolificacy and, as a consequence, high nutritional requirement, but this need for nutrients is rarely fully compensated by voluntary feed intake, even under favorable environmental conditions. A part of this nutritional deficiency can be supplied by the mobilization of body reserve. The reduction in the consumption of the female when subjected to heat stress confirms that the deficit intensifies the loss of body tissue. With a lower level of lysine available, there is a decrease in milk production and, consequently, a reduction in the growth potential of piglets and litter weight, which may also lead to increased mortality and a reduction in the number of weaned piglets, causing losses to swine producers. The aim of this study was to evaluate the effect of high temperatures on the productive and reproductive performance of lactating swine and her litter and to evaluate the mitigation of these effects with the use of dietary supplementation from a source of Vitamin C. The work was carried out on a farm commercial totaling 100 lactating females of birth order 1 to 8 and their litters. Females were randomly divided into two treatments with 50 replications. VitC (n=50): lactation ration with daily on top supplementation of 2 grams of vitamin C source (Poliherbal C Power, India); Control (n=50): lactation ration without supplementation on top of vitamin C source. The zootechnical indexes that include weight loss of lactating females, litter weight gain, live births, total births, mummified, stillbirths, reduction in the weaning-estrus interval, daily consumption of feed and water of lactating females, rectal temperature and respiratory rate of lactating females, tumor necrosis factor alpha, concentration of C-Reactive Protein, Aspartate Aminotransferase, Alanine Aminotransferase, nutritional composition and quantification of phosphate vitamin C in the feed and intestinal microbiota. In the partial results, the total feed intake per breeder in the postpartum period was 110.22 kg for VitC and 110.73 kg for the Control group. For litter weights, the VitC group had an average weight after standardization of 1.6 kg and an average weaning weight of 6.2 kg, while in the Control Group it was 1.6 kg for post standardization weight and 5.9 kg for average weaning weight. The laboratory results of C-Reactive Protein, Tumor Necrosis Factor alpha, Phosphated Vitamin C in the feed, Aspartate Aminotransferase, Alanine Aminotransferase showed no differences between treatments (P>0.05). Preliminary results indicate that there was no benefit with Vitamin C supplementation for lactating swine in periods of heat stress.

BANKING MEMBERS:
Interno - 2613308 - DELANO DIAS SCHLEDER
Interna - 1046884 - ELIZABETH SCHWEGLER
Presidente - 2648941 - IVAN BIANCHI
Interno - 2017813 - RICARDO EVANDRO MENDES
Interna - 2408296 - SORAYA REGINA SACCO