Utilização de sistema de resfriamento adiabático evaporativo visando à produção de ovos no Estado do Paraná

Abstract

The aim of this study was evaluate the use of evaporative cooling system (ECS) of air as an alternative to improve the thermal environment, aiming at egg production (EP) of Rhode Island Red laying hens (2.25 kg). The climatological data of air temperature and relative humidity used to estimate Temperature and Humidity Index (THI) and EP were collected in the IAPAR (Instituto Agronomico do Parana) meteorological field stations from Parana State. The use of ECS of air provides a significant reduction in the THI values, in all locations and periods of the years studied. Considering the average values, the THI of 65.99 can be reduced to 62.52 when it cooling the air. The annual EP ranged from 0.748 and 0.784. When utilizing the ECS of air was possible to get EP between 0.779 and 0.792. In North region, the use of ECS of air results in EP of 0.784, compared to 0.739 without cooling. In this way, the ECS of air provided a significant increase in the annual EP, except to South region, where was observed low annual temperature values.