Banca de DEFESA: FERNANDA ASCENCIO PACE

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : FERNANDA ASCENCIO PACE
DATA : 08/07/2019
HORA: 14:00
LOCAL: IFC- Campus Araquari, Bloco D - sala 302B
TÍTULO:

Thermal processing and palatabilizers in diets for piglets on physical-chemical characteristics of the feed, digestibility, performance and blood metabolites

PALAVRAS-CHAVES:

Gelatinization, molasses, pelleting, sugar, serum levels, temperature.

PÁGINAS: 45
GRANDE ÁREA: Ciências Agrárias
ÁREA: Medicina Veterinária
RESUMO:

The aim of the study was to evaluate the effect of the temperature (T) of pelleting (60°C or 90°C) and the type of palatabilizer (PTB); sugar or molasses, on n the physical-chemical characteristics of the diet, the performance and blood metabolites of piglets in the nurse phase and the digestibility of the nutrients of the diet. Thirty-two recently-weaned piglets (male and female) were randomly assigned to experimental treatments in a 2x2 factorial arrangement. All animals received the same basal diet. After adaptation, partial fecal samples were collected for five days for digestibility analyzes. For performance evaluation, the animals were weighed at 28, 35 and 40 days of age. Blood collection was performed at the beginning and end of the experiment. The data were submitted to analysis of variance to test the effect of the type of PTB, the T of pelletizing, their interactions and the averages compared by the Tukey test with 5% probability of error. Pelletizing at 90°C increased the durability index of the pellet in treatment with molasses. There was interaction between the type of PTB and T of pelleting on the content of fines, which reduced in treatments with T 90°C and increased in treatments with molasses (P<0.05). There was higher gelatinization of starch in sugar treatments, rather than molasses at 90°C. Also in the processing with higher T, there was increase of the gelatinization of the starch in the diets with sugar. There was no interaction between the type of PTB and T of pelleting on the contents of resistant and non-resistant starch (P>0.05). The type of PTB and T of pelletization did not influence the rates of resistant starch and non-resistant starch. Total starch index was higher in treatments using sugar. The use of molasses promoted higher digestibility of crude energy and mineral matter and pelletizing at 90°C increased the digestibility of Ca, P and mineral matter (P<0.05). There was no interaction between the type of PTB and T of pelleting on the average daily weight gain, total weight gain, blood metabolites, nor PTB or T-type effect of pelleting on these parameters. Although pelleting T had no effect on the serum concentration of the GGT enzyme, the use of molasses reduced GGT levels in the pelleted diet at 60°C. Molasses can replace sugar as a palatabilizer of feed in nurse piglets, without prejudice to the performance of the animals, promoting greater digestibility of crude energy and mineral matter, although it damages the physical-chemical characteristics of the diet. Molasses allowed to explore higher pelletizing temperatures (90°C) in the feed processing, increasing the digestibility of calcium, phosphorus and mineral material of the diets, in relation to the rations submitted to temperature of 60°C.

MEMBROS DA BANCA:
Interno - 1760760 - CARLOS EDUARDO NOGUEIRA MARTINS
Interna - 2277465 - FABIANA MOREIRA
Externa à Instituição - LUCÉLIA HAUPTLI - UFSC
Presidente - 1085177 - VANESSA PERIPOLLI