Banca de DEFESA: LUCAS RODRIGO JUSTINO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : LUCAS RODRIGO JUSTINO
DATA : 02/08/2019
HORA: 08:00
LOCAL: INSTITUTO DE ZOOTECNIA DA UFRRJ
TÍTULO:

Xilanase, Probiotic and Symbiotic in Growing Pork Diets.

PALAVRAS-CHAVES:

Additives, Intestinal Health, Microbiota, Nutritional Management,  Performance.

PÁGINAS: 40
GRANDE ÁREA: Ciências Agrárias
ÁREA: Zootecnia
SUBÁREA: Produção Animal
RESUMO:

The experiment was carried out in the swine sector of the Federal Rural University of Rio de Janeiro, with the objective of investigating the effects of supplementation of the enzyme xylanase individually or in combination with probiotic or symbiotic in the diet of pigs with reduction of the level of metabolizable energy . The variables studied were daily dietary intake (CRD), daily weight gain (GPD), feed conversion (CA), bone parameters, intestinal morphometry, intestinal microbiota composition and economic viability of experimental diets. Seventy 75 male and female piglets were used, with a mean initial weight of 25,024 ± 3,21 kg. The experimental design was a randomized block design, containing five treatments, five blocks totaling 25 experimental units composed of three pigs (two males and one female), with the following treatments: T1 = Reference diet; T2 = Basal diet with reduction of 100 kcal / kg of metabolizable energy; T3 = T2 + xylanase (100g / ton); T4 = T3 + probiotic (Bacillus subtilis and Bacillus Licheniformis) and T5 = T3 + symbiotic (Bacillus subtilis and Bacillus Licheniformis and Mananoligosaccharide). It was observed that the animals that received the T4 diet presented lower CRD (P <0.05) in the first experimental period (0-22 days) in comparison to those that received the T2 diet. In the second experimental period (22-30 days) there was no significant difference (P> 0.05) between treatments for any of the performance variables. In the total period (0-30 days) it was observed that T2 resulted in worsening of feed conversion in relation to T4, and no significant differences were observed between these treatments and the others. The treatments did not influence (P> 0.05) the physical and chemical characteristics of the 3rd metacarpal bone. The T5 diet resulted in a higher ratio of villus height: crypt depths in the jejunum compared to T2. In relation to the microbial diversity of the cecal content, the relative abundance (% of OTUs) for the Firmicutes, Actinobacteria and Proteobacteria phylae independent of the treatment were observed at phylum level.  While at the family level the greatest abundance was for  Lactobacillaceae, Steptococcaceae and Clostrideacea. The treatments did not significantly influence (P> 0.05) the total cost, net revenue and cost of feed per kilogram of pig produced. The T4 diet was the one that showed the best index of economic efficiency and better index of cost.

MEMBROS DA BANCA:
Externo ao Programa - 387731 - ANTONIO ASSIS VIEIRA
Presidente - 387738 - CRISTINA AMORIM RIBEIRO DE LIMA
Externo à Instituição - VERONICA DA SILVA CARDOSO - UFRJ