| Autor: |
Iliev, Margarit, Staykova, Genoveva, Tsonev, Todor |
| Předmět: |
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| Zdroj: |
Bulgarian Journal of Animal Husbandry / Životnov Dni Nauki; 2022, Vol. 59 Issue 2, p3-9, 7p |
| Abstrakt: |
The subject of the study were 254 ewes from the Bulgarian Dairy Synthetic population, owned by the Institute of Agriculture – Karnobat, born in the period 2013–2018. The aim of the study was to establish the dynamics of milk yield and fertility in sheep. The selection traits of milk yield of a standard 120-day period, duration of milking period and biological fertility by years of birth in animals of different ages have been studied and analyzed. The dynamic of milk productivity for 120 days was monitored from I to IV lactation, and biological fertility was monitored from I to IV lambing, until reaching 5.5 years. The data from the performed controls were processed by the method of variation statistics. It was established that the average milk yield for a standard 120-day period (108.6l), average daily milk yield (0.905 l) and duration of the milking period (140.6 days) were the highest during third lactation. Biological fertility of sheep increased from 134.2% to 154.1% during the time from the first to third lambing. The analyses of the obtained results indicate sufficient perspectives for increasing the potential and real productivity of sheep from the studied herd of Bulgarian Dairy Synthetic population. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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