Banca de DEFESA: MATHEUS CASTILHO GALVÃO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE: MATHEUS CASTILHO GALVÃO
DATA: 29/11/2022
HORA: 14:00
LOCAL: Videoconferencia
TÍTULO:

EFFECTS OF CRUDE PROTEIN SUPPLEMENTATION DURING BEEF COW’S MID-GESTATION ON THE COWS PERFORMANCE, MILK PRODUCTION AND METABOLISM

PALAVRAS-CHAVES:

beef cows, cow/calf systems, fetal programming, maternal nutrition

PÁGINAS: 50
GRANDE ÁREA: Ciências Agrárias
ÁREA: Zootecnia
SUBÁREA: Produção Animal
ESPECIALIDADE: Criação de Animais
RESUMO:

This study aimed to access the effects of protein supplementation (PS) during gestation and its interaction with the calf sex (CS) on the beef cows’ performance, physiology and metabolism at subsequent lactation. From 100 to 200 days of gestation, 43 purebred Tabapuã beef cows, were randomly assigned into 2 groups: Protein restricted (RES; n = 24) and Supplemented (SUP; n = 19). The RES cows were fed a basal diet. The SUP cows received the same RES basal diet with an additional supplementation (3.5 g/kg of BW, ~40% of crude protein). From day 200 of gestation from weaning all cows and their calves were equally fed. The SUP beef cows were 14% and 13% heavier (P < 0.01) at day 270 of gestation (pre-calving period) and 30 days in milk (DIM) than RES. They also tended (P = 0.08) to be ~15 kg heavier at 210 DIM (end of lactation period). The SUP cows produced ~2 additional kg of milk at 7 and 30 DIM than RES (P ≤ 0.02). From 30 days in milk (DIM) until the end of lactation (210 DIM) SUP and RES cows presented similar milk production. Milk fat and total solids percentages were lower for RES cows sucking female calves (P ≤ 0.04) at 60 DIM. The SUP cows had greater BHBA levels than RES at 30 DIM (P = 0.03). No PS × CS interactions (P ≥ 0.40) was verified for non-esterified fat acids, glucose or ureic nitrogen blood parameters. 

MEMBROS DA BANCA:
Externo à Instituição - PRISCILLA DUTRA TEIXEIRA - UFLA (Suplente)
Presidente - MATEUS PIES GIONBELLI (Membro)
Interno - MARINA DE ARRUDA CAMARGO DANES (Suplente)
Externo à Instituição - MARCIO DE SOUZA DUARTE - nd (Membro)
Externo à Instituição - LUTHESCO HADDAD LIMA CHALFUN - UNILAVRAS (Membro)
Interno - ERICK DARLISSON BATISTA (Membro)
Interno - DANIEL RUME CASAGRANDE (Membro)