Thermodynamic behavior of layers chicken houses with different climatization systems

• Grant number: 11/18449-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: January 01, 2012
• End date: December 31, 2012
• Field of knowledge: Agronomical Sciences - Agricultural Engineering - Rural Buildings and Ambience
• Principal Investigator: Leda Gobbo de Freitas Bueno
• Grantee: Tatiane Souza dos Santos
• Host Institution: Universidade Estadual Paulista (UNESP). Campus Experimental de Dracena. Dracena , SP, Brazil

Abstract

The ambience control in animal production has an influence on the performance of birds and is one of the main factors of production losses in tropical climates. Different ventilation systems are installed in animal housings in order to mitigate the effects of heat stress. The objective of this project is to assess the thermodynamic behavior of layers chicken houses, best suited for the region of Bastos, São Paulo, with different climatization systems and determine which of the systems evaluated brings more benefits to the producer. Will be measured in the same heat for three cycles (21 days) consecutively between the 30th to 40th week of age of the birds the main environmental variables will be collected for calculating the Index Globe Temperature and Humidity (BGT). Afterwards, it will be developed a geostatistical analysis to determine the spatial variation of the comfort index for comparison among poultry houses (ventilation systems) that were evaluated. The production of the birds will be monitored daily for 63 days and the quality of the eggs will be analyzed using samples of eggs for the last three days of each cycle of production. The variables will be analyzed using analysis of variance and means compared by Tukey test at 5% probability. Also a comparative analysis between the profitability of poultry farms assessed will be carried out. It is expected that the results of this research to identify which of the three ventilation systems is best suited for the region of Bastos, São Paulo, with regard to the thermal environment (homogeneity) and productivity of birds. (AU)