Agroznanje (Jan 2013)
Fertility and milking traits of Sanska goat in first three lactations
Abstract
The research has been conducted on Sanska goat breed in the first, second and third lactation. Milk yield control was conducted after weaning period in the intervals of 30 days. Fertility of Sanska breed in three consequential lambing was approximately 161.61%. If we look at the lactations (age of goats), the highest fertility was achieved for third lambing and it was 166.09%. Average lactation length was 241 day for the first, 243 days for the second and 249 days for the third lactation. Milk production was inthe first lactation 480.25 kg, II-578.90 and III-694.65 kg. Higher milk production was achieved in the second lactation compared to first by 98.65 kg. Compared to the first lactation, goats in the third lactation have produced 214.40 kg of milk more and compared to the second lactation 115.75kg more. Determined differences were statistically very significant (P<0.01). Average content of milk fat in the milk was 3.21%. Using the statistical analysis of obtained results, very significant result has been determined regarding the influence of lactation order on total amount of collected milk. Total milk yield and daily milk production was constantly increased from first to third lactation. Lowest average milk fat content was determined at the middle of lactation while its highest percent was determined in the last stage of lactation. Research results show that lactation order has very significant (P<0.01) influence at the amount of produced milk. Therefore, after the first lambing, goats produce least amount of milk, however amount of milk increases from lactation to lactation to reach its maximum between third and fourth lactation. The amount of milk is highly connected with the body development of goats, especially with the growth of mammary gland. Goat fertility was also higher by 4.14% in the third lambing compared to the first lambing. The influence of goat age is very obvious for this trait, too.
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