Índíces de conforto térmico e concentração de gases em galpões avícolas no semiárido Paraibano

Abstract

RESUMO:Esta pesquisa teve o objetivo de determinar os índices de conforto térmico e a concentração de gases no interior de galpões avícolas e suas influencias sobre o desempenho de frangos de corte comercias, em condições de verão, na região semiárida paraibana. Utilizaram-se dois aviários, um coberto com telha de cerâmica e outro coberto com telha de fibrocimento. Observou-se que não houve diferença significativa (p > 0,05) entre a temperatura ambiente (TA), umidade relativa do ar (UR), temperatura da água de bebida (Tágua) e da cama entre os galpões, sendo que os valores médios de TA (das 8h às 17h) e UR (das 10h às 16h) podem ser considerados fora do limite da zona de termoneutralidade recomendada para frangos de corte, como também a Tágua, no período diurno, ficou acima dos limites recomendados, que é de 24 o C. Nenhum dos aviários apresentou concentrações de gases que oferecesse insalubridade para as aves e para os trabalhadores. Apesar de a Tágua e de os índices de conforto térmico, nos horários mais quentes do dia, estarem elevados, os índices produtivos ficaram dentro do estabelecido pela indústria avícola brasileira. PALAVRAS-CHAVE:condições climáticas, produtividade, qualidade do ar. INDICES OF THERMAL COMFORT AND GASES CONCENTRATION IN BROILERS HOUSES IN THE SEMIARID REGION, BRAZILABSTRACT: The aim of this research is to determine the thermal comfort index, the concentration of gases inside the poultry houses and their influence on the performance of commercial broiler chickens, located in the Paraiba´s semiarid region, in summer conditions. It was used two poultry houses, one of them covered with a ceramic roof and the other covered with fibrous cement roof. There was no significant difference (p> 0.05) between ambient temperature (AT), relative humidity (RH) and temperature of the drinking water (Twater) and the chicken litter between the warehouses, but the values average of AT (from 08:00 a.m. to 5:00 p.m.) and RH (from10:00 a.m. to 4:00 p.m.) can be considered outside the boundary of the comfort zone recommended for chicken broilers, but also the Twater was above the recommended limits, during the day, which is 24 o C. None of the chicken broilers showed concentrations of gases that offer an unhealthy ambient to the birds and to the workers. Although the Twater and the index of thermal comfort are elevate during the hottest days, the production indices were within the established for the Brazilian poultry industry.

Broiler breeder hen performance and egg hatchability during rainy season in Brazilian semi-arid region

“…RIBEIRO et al (2008) in studies with semi-heavy laying hens, at the end of the first and during the second laying cycle, with sodium level of 0.18 and 0.23%, mention values of egg production of 76.20% and 71.29%, respectively. Egg-laying rates in June and July were similar to those described by FURTADO et al (2010), analyzing total egg production from different age hens, inferred that the birds at 35 and 48 weeks had 74.83 and 76.86% of egg production, respectively. It is observed in feed conversion, there is similarity between July and August (Table 1); however these months differed statistically from the value obtained in June.…”

“…Chicken genetic improvement aiming to reach higher growing speed, associated to nutrition, management, sanity, and ambience improvements generate a zootechnically effective bird with meat and egg production capacity allowing intensive breeding, in industrial scale which a large number of animals can be housed, but high production brings problems related to rearing environment (MENEGALI et al, 2009;FURTADO et al, 2010; and animal welfare, which has been more and more a very important concern of customers and producers (ALVES et al, 2007;ROCHA et al, 2008a).…”

Production of a product similar to gelatin from chicken feet collagen

“…Great part of the destination of export of chicken meat is countries with specific requirements of housing, related to the welfare of the birds (FURTADO et al, 2010;OWADA et al, 2007).…”

Control of ammonia emissions in naturally ventilated dairy cattle facilities in Portugal

“…Livestock facilities have been identified as the largest source of air pollution by agriculture due to contaminant gas emissions (FURTADO et al, 2012). The livestock facility ventilation need leads to gases and polluted air emission in the vicinity of facilities (FURTADO et al, 2010;TOLON et al, 2010), and therefore may present a risk for animal and human health (FURTADO et al, 2012). NH 3 emission has as origin the N excreted by animals in urea form and other N organic forms within the premises of facilities or outdoors or in adjacent areas, such as parks, feeding areas, storage tanks, animal traffic areas and waiting areas, for example, milking parlors.…”