30. Study on the growth rates of weaned lambs of the White Maritsa sheep breed

The aim of this study was to evaluate the live weight and growth rates of lambs in the post-weaning period. The breed of lambs is White Maritsa sheep (Biala Marishka ovca). Small database was collected during two years – 2014 and 2015 including 69 female and 16 male lambs from 4 herds in the region of Plovdiv. It was established that the live weight of single male lambs at weaning on the 60^th day of age was 25.13 kg, on the 90^th day – 32.01 kg, on the 120^th day – 39.19 and on the 150^th day – 43.52. The growing rate of the lambs at weaning was 418.9 g, from the 60^th to 90^th day – 229.1 g, from the 90^th to 120^th day – 239.3 g, from the 120^th to 150^th – 144 g daily gain.
The live weight of the female single lambs at weaning was 24.15 kg, on the 90^th day of age – 31.24 kg, on the 120^th day – 37.42 kg, on the 150^th day – 41.46 kg. The growing rates of female single lambs were as follows: at weaning – 402.5g, from the 60^th to the 90^th day – 236.4 g, from the 90^th to the 120^th day – 206.1 g, from the 120^th day to the 150^th day of age – 134.1 g. The live weight and growing rates of twin female lambs followed the same tendencies but at a lower level.