INFLUENCE OF SUCKLING PERIOD AND SEASON ON WEANING -TO- CONCEPTION INTERVAL IN SOWS

M. Petrova, Y. Marchev

Резюме: Evaluation of the influence of the suckling period and season on weaning-to-conception interval on the basis of informa¬tion from 690 sows (LWxL) was carried out. Data from two levels of suckling period – (4 and 5 weeks) and for 4 seasons were analyzed. An average duration of 7.61 days of the weaning-to-conception interval was established. Phenotypic vari¬ability in dependence on the studied factors was observed. For 4 week suckling period the weaning-to-conception interval was 7.1 days and for 5 week – 8.03 days. Season had significant (P<0.05) effect on this interval, lowest in autumn (6.87) days and highest in summer (8.12) days. In the other two seasons the duration of weaning-to-conception interval takes inter¬mediate position – 7.82 days in the spring and 7.28 days in the winter.

Ключови думи: season; sows; suckling period; weaning-to-conception interval

Дата на публикуване: 2017-05-22