Effect of Different Levels of Dietary Protein and Energy on the Growth and Slaughter Performance at „Hybro PN+” Broiler Chickens
Keywords:
„Hybro PN+” hybrid, broiler chickens, average daily gain, feed conversion index, slaughter yieldAbstract
In this paper was studied effect of different level of dietary energy and protein on the growth performance (average daily gain, feed conversion), slaughter yield and participation quota of the cut parts from the whole carcasses structure at „Hybro PN+” hybrid, slaughtered at 42 days old. The two groups (control group-Lc and experimental group-Lexp) have received compound feed with different levels of energy and protein. Chickens were weighed at: 1, 7, 14, 21, 28, 35 and 42 days. After slaughter, from each group were sampled 30 carcasses and were determined carcass characteristics using gravimetric measurements. At 42 days, the Lexp group has recorded higher values for the body weight (+7.83%) and average daily gain (+8.70%), compared with the Lc group. This performance has been achieved through an average individual feed intake of 4.162 kg, at Lc and 4.227 kg, at Lexp, meaning a value of 1.701 kg feed/kg gain, at Lexp group and 1.806 kg feed/kg gain, at Lc group. For slaughter yield at fresh carcasses resulted values from 77.22% (Lc) up to 78.21% (Lexp), at female chickens and from 78.55% (Lc) up to 79.12% (Lexp), at male chickens. After refrigeration, the values for this characteristic were decreased by 1.80 up to 1.89%. Participation quota of the cut parts from the whole carcasses structure has registered the highest values in Lexp group for breast and drumsticks, compared with Lc group. At the Lexp group, high levels of dietary protein and energy has significantly influenced: average daily gain, feed conversion ratio, slaughter yield and the participation quota of the cut parts from the whole carcasses structure (breast and drumsticks).
References
Vacaru-Opriş, I. şi col., Sisteme de tehnologii de creştere a puilor de carne, Ed. Ceres Bucureşti, 2005, 8-18, 52-54, pp. 71-102.
Vacaru-Opriş, I. şi col.: Tratat de avicultură, Vol. I, Ed. Ceres Bucureşti, 2001, 17-121, pp. 436-458.
3. Broiler Management Guide „Hybro PN+”, 2008, pp.3-85.
Leeson, S., Summers, J. D., Commercial poultry nutrition, Nottingham Univ. Press., England, 2005, pp. 230-295.
Solangi, A.A., Balocn, G.M., Wogan, P.K., Effect of different levels of dietary protein on the growth of broiler, J.Anim.Vet.Adv., 2003, 5, 301-304.
.Kenny, M., Kemp, C., What protein level will maximize your profits, Asian Poultry Mag., 2006, 4, 22-25.
Hassanabadi, A., The effects of early age feed restriction on performance on carcass characteristics of male broiler chicken. J.Anim.Vet.Adv., 2008, 7(4), 372-376.
Kamran, Z., Sarwar, M., Nisa, M., Effect of two-protein diets having constant energy to protein ratio on performance and carcass characteristics of broiler chickens from one to thirty days of age. World's Poultry Sci. J., 2008, 87, 468-474.
Al-Taleb, S.S., Effect of an early feed restriction on broilers on productive performance and carcass quality. J.Anim.Vet.Adv., 2003, 2(5), 289-292.
Driver, J.P., Pesti, G.M, Bokolli, R.I., Edwards, H., The effect of feeding calcium and phosphorus deficient diets broiler chicken during the starting and growing finishing phases on carcass quality, Poultry Sci.J., 2006, 85, 1939-1946.
Garcia, A.R., Botol, A.B., Baker, D.H., Variations in the digestible lysine requirement of broiler chickens due to sex, performance parameters, rearing environment and processing yield characteristics, World's Poultry Sci.J., 2006, 85(3), 498-504.
Marcu, A., Vacaru-Opriş, I., Marcu, A., Nicula, M., Dumitrescu, G., Dronca, D., Kelciov, B., The influence of feed energy and protein level on the slaughter performance for „Lohmann Meat” hybrid Sci.Papers, Anim.Sci. Series, USAMV Iaşi, 2011, 55(16), 120-125.
Marcu, A., Vacaru-Opriş, I., Marcu, A., Nicula, M., Dumitrescu, G., Dronca, D., Kelciov, B., The influence of feed protein-energy level on the growth and slaughter performance for „Arbor Acres” hybrid Sci.Papers Anim.Sci. and Biotech. Timişoara, 2011, 44 (2), 433-438.
Marcu, A., Vacaru-Opriş, I., Nichita, I., Nicula, M., Marcu, A., Kelciov, B., Effect of different levels of dietary protein and energy on the growth and slaughter performance at „Lohmann Meat” hybrid, Sci.Papers Vet. Med., 2011, XLIV (2), 221-231.
Gornowicz, E., Lewko, L., Pietrzak, M., Gornowicz, J., The effect of broiler chicken origin on carcass and muscle yield and quality, J.Cent.Eur.Agric., 2009, 10 (3), 193-200.
Kokosyński, D., Bernacki, Z., Comparison of slaughter yield and carcass tissue composition in broiler chickens of various origin, J.Cent.Eur.Agric., 2008, 8 (1), 11-1.
Nikolova, N., Pavlovski, Z., Major carcass parts of broiler chicken from different genotype, sex, age and nutrition system, Biotech & Anim. Husbandry, 2009, 25(5-6), 1045-1054.
Council Directive 2007/43/EC – 28.06.2007. Laying down minimum rules for the protection of chickens. Kept for meat production. Official J. of the European Union. L. 182/12.07.2009, pp.19-28.
Duran-Melensez, L.A., Poultry carcass evaluation and cutting, in Guerrero-Legarreta I., (edit)–Handbook of poultry science and technology, vol. II–Primary processing, Wiley & Sons Inc, London, 2010, pp.101-106.
Brudiu, I., Biostatistică în abordarea practică, Ed.Eurobit, Timişoara, 2010, pp.23-151.
