Каталог "Статии"
| Списание
Analysis of the live weight of Thracian merino lambs depending on the lambing season and type of birth
Stanimira Slavova; Petya Slavova
Б 1098
Детайли
- Източник - периодично издание
- ЖИВОТНОВЪДНИ науки
- Източник
- Животновъдни науки
- Година на издаване
- 2022
- Пор.№
- 4
- Страници
- с. 3-9
- Том
- 59
- Ключови думи
- lambing season, type of birth, live weigh, prolificacy, Thracian merino ewes
Допълнителна информация
- ISSN
- 0514-7441
- Анотация
- The aim of the present study was to establish the effect of lambing season and birth type on the weight development of Thracian merino lambs. Research was conducted at the experimental farm of the Agricultural Institute – Stara Zagora. Ewes of the Thracian merino breed were divided into 2 groups: group I /experimental/ – 102 ewes mated in anestral season /April–May/ after application of vaginal tampons for estrous synchronization and hormonal treatment for inducing superovulation; group II /control/ – 123 ewes mated in the estral season /July–August/, without being hormonally treated. Progeny was divided respectively into 2 groups: group I – lambs of hormonally treated ewes and group II – lambs of untreated ewes. The live weight of male and female lambs at birth, 10, 30, 70 days and at weaning, and of ewe lambs at 9 months of age were investigated, and the influence of season and type of birth on the level of the trait was established. Data were processed using program STATISTICA for Windows. It was found that the factors season and type of birth affected to a different extent the live weight of lambs from birth to weaning (and at 9 months for the females). The effect of season was weak and marked no definite tendency, while the birth type gave a significant advantage to singles over twins. Therefore, it could be summarized that the weight development of lambs was not so strongly influenced by the season as by the type of birth of lambs.
- Системен №
- 133161
- Website
- https://animalscience-bg.org/page/en/details.php?article_id=764