Diagnóstico ambiental e índices zootécnicos em galpões de poedeiras no semiárido paraibano.

Abstract

The objective of this work was to evaluate the indexes of environmental and productive comfort for laying hens of Lohamann lineage, in conditions of summer and winter of 2005, in Sao Jose da Mata district's in Campina Grande's city, which is located in Paraiba's semi-arid. Three poultry houses with different thermal accommodation's systems were used and were classified by: californian poultry house (GC), poultry house without nebulosity (GSN) and poultry house with nebulosity (GCN). The indexes: air temperature (TA), the black globe and humidity temperature (ITGU), thermal charge radiation (CTR), air relative humidity (UR), clarity (lx), sound pressure levels(noises), the productive indexes of total eggs' production (PT), egg weight (PO), albumen weight (PA), egg yolk's weight (PG) and rind's weight (PC) were evaluated in function of the bird's age. During some weeks was used a number of 34.500 birds, from 18 to 88 weeks of age with a daily production of 22.500 eggs. The environmental indexes were measured everyday, in each two hours from 8:00 a.m to 4:00 p.m in the internal area of the poultry houses. Based on the environmental thermal indexes, it was concluded that the accommodation's system open californian poultry house (GC) showed a better performance of environmental comfort when it was compared to the other systems. In relation to the sound pressure levels (noises), it is observed that in the analyzed systems the workers are not exposed to the insalubrities. The productive indexes in all accommodation's systems are according to the thechnique recommendations. The bird's age influenced in the indexes of total production, egg weight and also yolk's egg weight. The highest production of eggs was obtained to youngest birds. On the other hand, egg weight and the yolk's egg weight were obtained to oldest birds.