Banca de DEFESA: JACSON EDUARDO BITTENCOURT

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JACSON EDUARDO BITTENCOURT
DATE: 10/12/2021
TIME: 14:00
LOCAL: Web Conferência - Microsoft Teams.
TITLE:

Effect of different temperatures on the feed intake of lactating females and piglet weight gain in a controlled adiabatic cooling system.

KEY WORDS:

Maternity, ventilation system, economic return, animal welfare.

PAGES: 45
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUMMARY:

The consumer market is increasingly demanding improvements in production practices, with special emphasis on animal welfare, one of the requirements for this challenge being the search for mechanisms to improve the thermal comfort of animals. The objective of this work was to evaluate two different temperatures, seeking to combine thermal comfort with the best zootechnical and economic performance in the lactation phase. The design was carried out in completely randomized blocks in a contemporary group and divided into two rooms with 108 females each, with three replications totaling 648 females evaluated. Each maternity room had 108 numbered calving cells (2.40mx 2.80m) and equally distributed in the shed. The maternity rooms had a transversal adiabatic ventilation and cooling system, with six sets of exhaust fans, enabling six different air displacement speeds, ranging from 0 to 1.0 m/s. Two temperature control parameters with a variation of two degrees High (23°C) and Low (21°C) were used. There was no influence of the different temperature curves on the weight of females when leaving the hatchery, as well as on the performance of litters (P>0.05). There was a difference in the food consumption of females, with those kept in rooms with lower temperatures had higher total feed consumption in the phase compared to those kept at higher temperature (6.14±0.10 vs. 5.95±0.10, P<0.001), regardless of the delivery order. The present study is the first to investigate the temperature preference within the comfort zone of the lactating swine. The results indicated that temperatures closer to the upper limit temperature favored female performance, with a reduction in feed consumption, without impacting litter development.

BANKING MEMBERS:
Externa à Instituição - INÊS ANDRETTA - UFRGS
Externo à Instituição - ERICO KUNDE CORREA - UFPel
Presidente - 2648941 - IVAN BIANCHI