Relationship between birth weight and body growth characteristics of lambs
2014
Petrović, P. M. (Institute for Animal Husbandry, Belgrade-Zemun (Serbia)) | Petrović, V. C. (Institute for Animal Husbandry, Belgrade-Zemun (Serbia)) | Ilić, Z. (Faculty of Agronomy, Priština-Lešak (Serbia)) | Ružić-Muslić, D. (Institute for Animal Husbandry, Belgrade-Zemun (Serbia)) | Petrović, M. M. (Institute for Animal Husbandry, Belgrade-Zemun (Serbia)) | Stojković, J. (Faculty of Agronomy, Priština-Lešak (Serbia)) | Maksimović, N. (Institute for Animal Husbandry, Belgrade-Zemun (Serbia))
Research was carried out in population of R2 generation Pirot pramenka x Pirot improved sheep during period of three years. Lambs were divided into three groups: I from 2.5 kg to 3.5 kg; II from 3.6 kg to 4.5 kg; III from 4.6 kg to 5.5 kg. Weight of lambs was controlled at birth, with 30, 60 and 90 days of age. Average body weight at birth of the tested lambs was 3.35 kg in the first group, 4.30 kg in the second group and 5.06 kg in the third group. At 30 days of age, the body weight of the lambs was 10.19 kg in the first group, 11.39 kg in the second and 12.49 kg in the third group. All these differences in body weight of lambs at birth were statistically highly significant (P? 0.01). With 60 days of age, average body weight was 16.48 kg in the first group, 19.01 kg in the second and 20.49 kg in the third group. Differences between groups of lambs at this age were statistically very significant (P?0.01).On the end of experiment at 90 days of lambs age, we have found the following values of the body weight of lambs: 26.35 kg in the first group, when the second 30.49 kg and 28.93 kg in the third group. Differences between groups of lambs at this age were statistically very significant (P?0.01). At the age of 90 days maximum weight of the body was in the second group of lambs, or a group which body weight at birth occupied the mean of the population. Correlations between body weights of lambs vary from weak to mid- sized values. The highest values of correlation coefficients were found between body weight at birth and weight of lambs at 30 days of age.
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