| In order to determine the growth and development rules of Ross 308 broiler, three growth patterns including
Logistic, Gompertz and Von Bertalanffy were used to fit and analyze the growth of 120 Ross 308 broilers, and the different
age average week gain, relative growth rate and feed conversion ratio were measured. The results showed that the fitting
degrees of three models were all above 0.99. Analyzed from the indexes like inflection point weight and inflection point
age, the fitted value of Logistic curve agreed with the actual measured value most, of which the fitting degree, inflection
point weight and inflection point age were 0.99, 2 160.25 g and 5.77 weeks, respectively. The feed conversion ratios were
from high to low in the two periods, and the lowest appeared in the later period. Comprehensive analyzed, Logistic curve
most fit for Ross 308 broiler, and the best slaughter time was 6 weeks. |
