Qualidade da cama e do ar em diferentes condições de alojamento de frangos de corte

Abstract

Resumo -O objetivo deste trabalho foi avaliar as condições iniciais de alojamento de aves, de um dia de idade, em termos da qualidade da cama de frango reutilizada e do ar, em aviários comerciais de produção com diferentes sistemas de ventilação mínima e tipologia, por meio de análise geoestatística. O experimento foi realizado em quatro aviários: Blue House I (T1) e Blue House II (T2), Dark House (T3) e Convencional (T4). As variáveis analisadas foram: pH, umidade, temperatura superficial e concentração de amônia, tendose coletado as amostras na altura dos frangos, em 80 pontos equidistantes no interior do pinteiro. A análise geoestatística auxiliou a identificação de pontos críticos no controle dos ambientes estudados. O manejo da ventilação mínima não é suficiente para garantir a qualidade do ar nos pinteiros. A cama reutilizada de casca de café e arroz (T1 e T2) apresenta melhor qualidade do que a cama reutilizada de maravalha fina (T3 e T4). O sistema de ventilação mínima, em T2 e T4, é o mais eficiente quanto à renovação do ar nos pinteiros.Termos para indexação: cama reutilizada, casca de arroz e café, conforto animal, geoestatística, maravalha, sistema de ventilação mínima. Litter and air quality in different broiler housing conditionsAbstract -The objective of this work was to assess the initial conditions of poultry housing for one-day-old chicks regarding the quality of reused bedding and of the air in commercial broiler houses with different types of minimum ventilation and typology, using geostatistical analysis. The experiment was carried out in four broiler houses: Blue House I (T1) and Blue House II (T2), Dark House (T3), and Conventional (T4). The following variables were evaluated: pH, moisture, surface temperature, and ammonia concentration, and samples were collected at bird height at 80 equidistant points in the brooding areas. Geostatistical analysis helped to identify the environmental critical control points. The management of minimum ventilation is not sufficient to guarantee air quality in the brooding area. The reused coffee and rice husk beds (T1 and T2) show better quality than the reused wood shaving beds (T3 and T4). The minimum ventilation system, in T2 and T4, is the most efficient regarding air renovation inside the brooding areas.

Composition of Poultry Litter in Southern Brazil

“…The other water soluble-f N is mainly uric acid, which corresponds to 60 to 70 % of the N excreted by poultries (Nahm, 2003). Mowrer et al (2013) determined the forms of N in 118 samples of poultry litter and found that uric acid and ammonium represented 9.4 and 17.4 %, respectively, of the total N. Significant amounts of ammonium may be lost from this kind of organic waste, mainly under high temperatures (Oliveira et al, 2003;Carvalho et al, 2011). Thus, drying the material before analysis, even at temperatures in the range of 40 to 60 °C, may result in significant losses of N as ammonia (Wood and Hall, 1991).…”

Zeolites in poultry and swine production

“…Reused litter has a greater amount of excreta, and leads to high humidity and increased ammonia levels inside poultry houses ranging from 60ppm up to 100ppm, which is harmful for broilers health (CARVALHO et al, 2011). Therefore, zeolites are incorporated into litter to reduce ammonia and moisture levels, through its ability to adsorb ions and absorb water.…”

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

“…These authors describe that CO and CO 2 inside buildings were within the acceptable limits for a good breeding stock development. CARVALHO et al (2011) evaluating air quality for first broiler housing, at varied minimum ventilation system and building typology (blue, dark and conventional house), concluded that used ventilation was not enough to assure air quality in the facilities.…”