Effect of genotype and stocking density on broiler performance during two subtropical seasons

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• 作者：Kow Benyi ; Avhafunani Justice Netshipale…
• 关键词：Broiler chickens ; Season ; Genotype ; Stocking density ; Carcass
• 刊名：Tropical Animal Health and Production
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：47
• 期：5
• 页码：969-974
• 全文大小：136 KB
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• 作者单位：Kow Benyi (1)
  Avhafunani Justice Netshipale (1)
  Kgabo Tryphina Mahlako (1)
  Eastonce Tendai Gwata (1)
  
  1. School of Agriculture, University of Venda, P. Bag X5050, Thohoyandou, 0950, South Africa
  
• 刊物类别：Medicine
• 刊物主题：Medicine & Public Health
  Veterinary medicine
  Zoology
  
• 出版者：Springer Netherlands
• ISSN：1573-7438

文摘

Ross 308 and Cobb Avian48 broilers were raised at stocking densities of 30, 40, and 50?kg BW/m2 during 49-day production period in winter and summer. The effect of season, genotype, and stocking density on growth performance and carcass characteristics was investigated. Ross 308 consumed more feed, gained more body weight, and was heavier than Cobb at slaughter age. Chickens raised in winter consumed more feed, gained more body weight and were heavier at slaughter age but had a higher mortality rate than those raised in summer. Broilers raised at the stocking density of 30?kg BW/m2 gained more body weight and were heavier at 49?days than those raised at 40 and 50?kg BW/m2. There was a progressive reduction in feed intake with increasing stocking density but neither season, genotype nor stocking density influenced feed conversion ratio. There was a genotype effect on the percentage gizzard weight, while stocking density influenced the percentage weights of carcass, breast, gizzard, heart and abdominal fat. There were genotype?×?stocking density interaction effects on feed consumption during the grower and finisher stages as well as the relative weights of breast, gizzard and heart. It is suggested that for profitable broiler production in the tropics and subtropics Ross 308 reared at stocking density of 30?kg BW/m2 preferably in winter be considered.