AvaliaÃÃo e caracterizaÃÃo espacial do ambiente termoacÃstico e de iluminÃncia na produÃÃo de frangos de corte sexados / valuation and spatial characterization of the thermoacoustic and illuminance environment in the production of sexed broiler chickens / valuation and spatial characterization of the thermoacoustic and illuminance environment in the production of sexed broiler chickens / AvaliaÃÃo e caracterizaÃÃo espacial do ambiente termoacÃstico e de iluminÃncia na produÃÃo de frangos de corte sexados

AUTOR(ES)

Adriana Garcia do Amaral

DATA DE PUBLICAÇÃO

2009

RESUMO

Broiler production in Brazil, and particularly in the state of Minas Gerais, possesses a great potential for expansion and improvement. In that way, solutions must be sought in order to further improve the productive process, thus enabling that the birds express all their genetic potential while minimizing the production costs and maximizing yield productivity. The objective of the present study was both to spatially evaluate and characterize the production environment of sexed broiler chicken, males and females, reared in a commercial broiler house equipped with conventional ventilation and misting system and its effects on the birds. Therefore, this study was divided into distinct works. The objective of the first was to evaluate the effect of the production environment upon the productive performance and physiological responses of the birds. Analysis of weight gain, body mass and mortality as well breath rate, rectal temperature, skin temperature and feather temperature demonstrated that males presented productive performance significantly superior to that of females, however this difference was not related to the productive environment since no significant differences were found among the production environments. In the second work, evaluation and specialization of the thermo-acoustic and illuminance variables by means of the black-globe humidity index (BGHI), air velocity (Vair), noise and illuminance levels were performed. Spatial distribution maps of the broiler house were made by the interpolation of the variables by the kriging method. Spatialization of the variables demonstrated the presence of small areas throughout the house with distinct values in relation to the BHGI, Vair and illuminance of the rest of the installation.

ASSUNTO(S)

poultry production productive performance ambiente de produÃÃo distribuiÃÃo espacial respostas fisiolÃgicas desempenho produtivo production environment engenharia agricola spatial distribution avicultura physiological responses

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