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

Engenharia Agrícola

Dermeval A. Furtado²  Laura D. C. A. Tota¹  José W. B. Nascimento¹  Mércia C. Da C. Guimarães¹  José P. Lopes Neto¹ 

[1],UFCGCampina Grande PB

关键词: ambience;    thermal comfort;    egg-laying;    noise;    ambiência;    conforto térmico;    postura;    ruído;   

DOI  :  10.1590/S0100-69162014000300001

来源: SciELO

【 摘 要 】

Henhouse thermal comfort and bird age influence broiler breeder hen productivity; this way, the present research aimed to assess thermal comfort indexes and broiler breeder hen performance during winter in North East semi-arid region from Brazil, using a Cobb Avian 48 broiler strain at the age of 38 and 50 weeks. We measured the following bioclimatic indexes: air temperature and relative humidity, black globe temperature and humidity, CO2 concentration and sound pressure levels at henhouse facility. Data analysis design was complete randomized in a 3 x 3 factorial scheme with three treatments (months) and three replications (week number of collection by month). A number of 25 climatic data were observed. Bioclimatic indexes at the most warm hours throughout the day promoted bird discomfort yet sound pressure and carbon dioxide levels were under the Brazilian standards. Even in thermal comfort zone at some hours, the productivity indexes were in compliance with those recommended by the strain creation guidebook.

【 授权许可】

CC BY   
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