Growth Parameters Of Heavy-Breed Avian Youth Fed Organic System

• Main Authors: Eliza Simiz, Alexandru T. Bogdan, Dan Drinceanu, Lavinia Ştef, Călin Julean, Ioan Luca, Florin Simiz
• Format: Article
• Language: English
• Published: Agroprint Timisoara 2011-05-01
• Series: Scientific Papers Animal Science and Biotechnologies
• Subjects: organic system; heavy-breed poultry; growth parameters
• Online Access: http://spasb.ro/index.php/spasb/article/view/447

The experiment on the assessment of development parameters in the case of heavy-breed young poultry was carried out in concordance with the common legislation, with the provision of feeding and maintenance conditions specific to the organic system. The experiment lasted for 84 days (150 chickens); in this period, we used two structures of concentrate mixtures: CM1 (from 1 day to 42 days), with the following characteristics 3003 kcal EM, 19.91% CP, 1% lysine, 0.57% methionine + cystine, 1.08% Ca and 0.62% P and CM2 (from 43 to 84 days) with 2981 kcal EM, 16.03% CP, 0.73% lysine, 0.47% methionine+cystine, 1.06% Ca and 0.58% P. During the experiment, we recorded the growth performances (body weight, growth, daily gain) and the CI. The body weight recorded at 84 days was 1623.10±37.0 g, with a daily mean growth of 19.32 g and a specific intake of: 3.68 kg AC, 11261.28 kcal EM, 635.35 g CP, 31.03 g lysine and 19.02 g methionine+cystine/kg growth. We determined a mathematical model for body mass prediction depending on energy and protein ingestion, generating an equation of this type: y=a+b*ln(x1)+c*ln(x1)2+d*x2+e*x2 2, with a multiple determination coefficient R2=0.99 and an error percentage at the end of the growth period of 0.02%, beetwen predicted and experimental values.