Banca de DEFESA: RODRIGO DE LIMA DOMINGOS

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE: RODRIGO DE LIMA DOMINGOS
DATA: 13/03/2024
HORA: 15:00
LOCAL: on line
TÍTULO:

Use of a precision feeding program during gestation improves the performance of high-

producing sows compared to conventional feeding programs.

PALAVRAS-CHAVES:

nutrition, requirements, swine, 

PÁGINAS: 95
GRANDE ÁREA: Ciências Agrárias
ÁREA: Zootecnia
SUBÁREA: Nutrição e Alimentação Animal
ESPECIALIDADE: Exigências Nutricionais dos Animais
RESUMO:

Use of a precision feeding program during gestation improves the performance of high-
Current gestating sow feeding strategies are based on using a single diet for all sows regardless
of parity or gestation stage. Precision feeding (PF) of the individual sows allows dynamic
changes in amino acid and energy requirements throughout gestation. The hypothesis of the
study was that meeting the daily predicted amino acid and energy demands of gestating sows
using a mathematical model and Automatic Intelligent Precision Feeder to establish the
nutrition programs, would improve reproductive and productive performance compared to
conventional feeding programs. Seventy-five mixed-parity sows were distributed among 3
treatments. A treatment managed as flat curve (FLAT: 2.1 kg/day (d), 1 – 110 d), a high-low-
high curve (HLH: 2.2 kg/d, 1 - 49 d; 2.0 kg/d, 50 – 84 d; 2.6 kg/d, 85 – 110 d), where sows
received the same diet (3.2 Mcal Metabolizable Energy (ME)/kg; 0.7 g/kg standardized (SID)
lysine). For the PF treatment, feeding level and blend of 2 basal diets (3.0 Mcal ME/kg; 8.0 and
2.0 g/kg SID Lysine for high and low lysine, respectively) was adjusted daily for each sow to
accurately meet estimated amino acid and energy requirements based on live weight,
gestation stage and parity order. Sows fed PF were heavier on d 110 of gestation (281.6 vs.
260.3 and 260.15 kg to PF, FLAT and HLH respectively; P=0.011) and showed a higher total
number of born (+2.04; P=0.092) and born alive (+1.84; P=0.077). Sows fed PF showed a
higher milk yield (+1.4 kg/ d; P=0.043), weaned a larger litter size (+1.43 piglets; P=0.050) and
consequently, showed a higher litter weight (+3.32 kg; P=0.003) at weaning. PF sows also
presented an improved maternal transformation index (+15%; P=0.013 when compared to HLH
and FLAT. In conclusion, our results demonstrate that the application of PF strategies based on
daily nutrient adjustments throughout gestation is highly beneficial for high-producing sows to
support the dynamic needs for nutrient availability for the sow´s body growth, fetal and
mammary gland development.

MEMBROS DA BANCA:
Externo à Instituição - ALEXANDRE DE OLIVEIRA TEIXEIRA - UFSJ (Membro)
Externo à Instituição - ALYSSON SARAIVA - UFV (Suplente)
Interno - BRUNO ALEXANDER NUNES SILVA - UFMG (Membro)
Presidente - MARVIO LOBAO TEIXEIRA DE ABREU (Membro)
Interno - PAULO BORGES RODRIGUES (Suplente)
Externo à Instituição - WAGNER AZIS GARCIA DE ARAÚJO - IFMG (Membro)
Externo à Instituição - RENNAN HERCULANO RUFINO MOREIRA - UFERSA (Membro)