Effect of body weight of goats and lactation order on the growth rate of kids in the suckling period
2011
Žujović, M., Institute for Animal Husbandry, Belgrade-Zemun (Serbia) | Memiši, N., Mlekara AD, Subotica (Serbia) | Bogdanović, V., Faculty of Agriculture, Belgrade - Zemun (Serbia) | Tomić, Z., Institute for Animal Husbandry, Belgrade-Zemun (Serbia) | Maksimović, N., Institute for Animal Husbandry, Belgrade-Zemun (Serbia) | Bijelić, Z., Institute for Animal Husbandry, Belgrade-Zemun (Serbia) | Marinkov, G., Institute for Animal Husbandry, Belgrade-Zemun (Serbia)
The paper presents results of investigation of milk yield by lactation, by order, and mother's body weight on growth rate of kids of the domestic Balkan goat. Daily weight gains of 376 single kids (168 male and 208 female), in three monthly intervals, and their final body weight at 90 days of age were established. Variability of analyzed traits was presented using descriptive statistics parameters, and differences of growth traits for weight gain of kids resulting from the effect of milk yield of female goats by order of lactation were investigated by single analysis of variance. The effect of independent variables, mothers' milk yield and body weight, on body weight of kids was tested using multiple regression analysis. During the entire suckling period, established average values for kids body weight differed significantly (P is less than 0.001), increasing from the 1st toward later lactations. At 90 days of age the lowest values were established in kids from the youngest mothers (11.86 kg), while for kids of mothers in the fourth or later lactations these values were higher (13.93 kg). Coefficients of determination indicate that the variability percentage for individual growth traits of kids was in the 0.08 - 0.17 interval, indicating its significance. Both b coefficients (b1 and b2) are positive and statistically highly significant, except for coefficient b2 in the analysis of body weight of kids at birth. The positive sign and high statistical significance indicate a pronounced effect of mother's milk yield and body weight on the body weight of kids up to 90 days of age.
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