Effect of dietary protein and metabolizable energy levels on growth and carcass yields in Betong chicken (KU Line)
2010
Anupol Putsakul(Kasetsart University, Bangkok (Thailand). Faculty of Agriculture. Department of Animal Science) E-mail:[email protected] | Chaiyapoom Bunchasak(Kasetsart University, Bangkok (Thailand). Faculty of Agriculture. Department of Animal Science) | Boonorm Chomtee(Kasetsart University, Bangkok (Thailand). Faculty of Science. Department of Statistics) | Sanit Kao-ian(Kasetsart University, Bangkok (Thailand). Faculty of Economics. Department of Agricutural and Resource Economics) | Panwadee Sopannarath(Kasetsart University, Bangkok (Thailand). Faculty of Agriculture. Department of Animal Science)
Objectives of this study were to determine the effects of dietary protein, energy levels and sex on growth performances and to maximize the differences between farm gate price of carcass and feed cost of Betong chicken (KU Line). Two hundred eighty eight Betong chicken (KU Line) at 4 weeks of age were assigned to the 3*2*2 factorial in completely randomized block design with 2 blocks. The chicks were fed ad libitum with 3 levels of dietary crude protein (20, 18 and 16 percent CP) and 2 levels of dietary metabolizable energy (3,000 and 2,800 ME Kcal/kg) combinations in each sex (male and female) for 4-20 weeks of age. The results indicated that male Betong chickens had higher growth and carcass performances than those of female Betong chickens (P LT 0.01) for all ages. The body weight at 12 weeks of age in male Betong chickens received 18 and 20 percent dietary CP were higher than those received 16 percent dietary CP (P LT 0.05). The body weights at 12 weeks of age in both genders received diet containing 3,000 ME Kcal/kg were higher than those received diet containing 2,800 ME Kcal/kg (P LT 0.05). The effects of dietary CP and ME levels were not significantly important in both genders for growth and carcass performances, feed conversion ratio and difference between farm gate price of carcass when the chickens were more than 16 weeks of age. Selling chicken at 18 and 20 weeks of age gave the highest difference between farm gate price and feed cost for male and female chickken, respectively.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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