THE INFLUENCE OF BREED, SEX AND LITTER SIZE ON THE GROWTH INTENSITY OF LAMBS

The purpose of this study Was to evaluate the growth intensity on the basis of Weight gains and live weight of the Suffolk and Charollais breeds. The experiment also included the assessment of the fat and muscle depth of meat breeds. All the monitored indicators were evaluated depending on the breed, sex and litter frequency. Selected meat breeds were reared in SZP Zabdice. The lambs were weighed 4 times and the weight was recalculated to 30. 70. 100 and 200 days of age. Measured parameters of muscle and fat depth Were statistically significant (P < 0.01) in lambs divided by breed and sex. While control weighing, no statistical differences were found (P > 0.05) during evaluation of the intensity of growth using average daily increments and veights. The biggest depth of the muscle had ewe lamb of the Suffolk breed (2.94 cm), followed by the rams of the same breed (2.74 cm). The muscle and fat depth of the studied breeds was significantly (P < 0.5) higher for the Suffolk breed than for the Charollais breed.