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Рост и развитие чистопородного и помесного молодняка шаролезской породы в послеотъемный период в условиях комплекса
2009
Zyl, V.M. | Letkevich, V.I. | Sidunov, S.V. | Loban, R.V. | Yurenya, A.S., National Academy of Sciences. Scientific and Practical Center of Animal Breeding (Belarus)
Growth and development of mixed bred Charollais x white-and-black young stock and black-and-white bull-calves since 8-month old age till and 15-month old age were studied in the conditions in the Republic of Belarus. In course of studied there were analyzed linear growth; young stock growth intensity; forage consumption; efficiency of experimental results. On the basis of obtained data there was determined the absolute growth rate of bull-calves at certain growing periods. Research results showed that dramatic changing of technology of management and feeding of mixed bred Charollais x white-and-black young stock bulls after weaning period caused the decrease of daily average live weight gain from 8-month old age till and 15-month old age in comparison with white-and-black cattle on 99 grams or 14%. Analysis of exterior of experimental animals confirmed the priority of mixed bred young cattle over white-and-black herdmates. They were characterized by massive corpus, wider and deeper barrel, wide withers, back and coupling
Show more [+] Less [-]Репродуктивные качества свиноматок в системе переменного скрещивания
2009
Dojlidov, V.A. | Lobatskij, A.K., Vitebsk State Academy of Veterinary Medicine (Belarus)
The analysis of data on a complex of reproductive qualities crossing sows has shown, that the combinations used in the classical scheme of variable crossing have appeared are less effective in comparison with the combinations including foreign meat breeds. It is recommended to change the traditional scheme of variable crossing, having excluded from it the Belarus black-motley breed and having entered foreign breeds of L and D and also to use hybrid male pigs (D x P)
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