Banca de DEFESA: NATHÁLIA RAFAELA FIDELIS CAMPOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : NATHÁLIA RAFAELA FIDELIS CAMPOS
DATA : 20/02/2017
HORA: 09:00
LOCAL: Sala de Reuniões da Direção da EAJ
TÍTULO:

Feed supplements of deferred pasture matrices: performance of sheep and lambs until weaning

PALAVRAS-CHAVES:

biometric measurements, concentrate, multiple blending, sheep, supplementation, weight gain

PÁGINAS: 80
GRANDE ÁREA: Ciências Agrárias
ÁREA: Zootecnia
SUBÁREA: Produção Animal
RESUMO:

The objective was to evaluate the effect of food supplementation of sheep kept in deferred pasture during lactation on performance and biometric characteristics of the birth of lambs at weaning. The experiment conducted in the experimental area of the Study Group of Forage (GEFOR) located in the Campus Macaíba the Federal University of Rio Grande do Norte – UFRN, in the period from December 30, 2015 to June 19, 2016. Were used 61 lambs, with no defined racial pattern, from 55 matrices, with no defined racial pattern, with an average of 120 days of gestation at the beginning of the experiment. The matrices were randomly distributed in three treatments (multiple mixture supplementation, 0.4% concentrated supplementation and 0.8% concentrated supplementation of live weight). The matrices remained in deferred pasture of Brachiaria brizantha cv. Marandu in the daytime, collected at collective bays where the supply of supplements occurred. Milk samples collected from the matrices for analyzes of their constituents and somatic cells. The samples collected from were colostrum and at 7, 14, 21 and 28 days postpartum. The performance of the offspring evaluated from the birth weight, with weekly weighing up to the age of 90 days (weaning age). Thus, it was possible to follow the average daily gain (GMD) and the total weight gain (GT). The biometric measurements started at 30 days of age and biweekly until they reached 90 days of age. There was an effect (P<0.05) of the food supplementation of the mother, the lamb sex, the calving type and the breed of the breeder on the live weight of the lamb at birth at 30, 60 and 90 days of age. There was an effect (P<0.05) of GMD and GT for the same variables presented. For the biometric measurements, the effect was significant (P<0.05) only for food supplementation of the matrix and type of delivery. There was no effect (P>0.05) of the food supplementation of the matrix for the composition and quality of the milk of the sheep. In view of this, using deferred pasture associated with concentrated supplementation at levels of 0.4% or 0.8% for gestation and lactation matrices, promotes better productive and reproductive performance for these animals, as well as better development of lambs from birth to weaning, with the weight gains that allow a live weight of over 18 kg at weaning, as well as better biometric measurements, which ensure better conformation carcasses.

MEMBROS DA BANCA:
Interno - 2313454 - ADRIANO HENRIQUE DO NASCIMENTO RANGEL
Interno - 986835 - GELSON DOS SANTOS DIFANTE
Externo à Instituição - DENISE BAPTAGLIN MONTAGNER - EMBRAPA
Externo à Instituição - JOAO VIRGINIO EMERENCIANO NETO - UNIVASF