STUDY THE AGE OF WEANNING ON WEIGHT DEVELOPMENT OF BULGARIAN SIMENTAL BREED
Keywords:
age of weaning, average daily gain, Bulgarian Simmental breed, calves, difference weight, suckingAbstract
The objective of the study was to determinate the impact of weaning age on weight development, growth and feed for 1 kg gain (growth) in calves from the Bulgarian Simmental breed, fattened to 700 kg live weight. Two groups with 12 calves in each were formed. Calves from group I were weaned at the age of 3 months, while those from group II were sucking from their mothers until 7 months of age. It was found that the intensity of growth of the animals was significantly higher in calves sucking to 7 months of age and they have achieved significantly higher average daily gain with 18.81%, (P<0.01) compared to the control group which has realized an average daily gain of 1139 g. for 90-day period. As a result of weaning, which usually causes stress, calves from the second group decreased rate of weight development, but at 12 months of age the average live mass was with 12.44% higher (448.62 against 399.00), compared to the analogues from the first group, weaned at 3 months of age and the differences for live weight and daily gain were significant (P<0.05 and P<0.01). All data were statistically processed.
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