Published in Scientific Papers. Series D. Animal Science, Vol. LXIV, Issue 1
Written by Evgeniya ACHKAKANOVA, Genoveva STAYKOVA
Subject of the study were 655 female lambs from the Ile de France breed, born in the period 2017-2020 in Bulgaria. Weight development was monitored. Live weight at birth, at 30, at 70 days and 9 months was measured. The gain for the studied periods was calculated. The analysis was made using a multifactor linear-statistical model for each studied age. The factors inducing a specific variance were year of birth, lambing season, and farm. The year had a significant effect on the live weight at all studied ages, except weight at birth. The season affected live weight at all levels, excluding weight at 30 days. The average daily gain indicated a reliable specific variance depending on the year of birth of all studied ages. The season affected the gain of 30 to 70 days only. The farm had a highly significant effect on the live weight and the gain at all ages. The obtained results for live weight and gain from birth to 9 months of age confirmed the good adaptation of the breed in Bulgaria and the opportunity for realization its potential for high growth intensity at an early age.
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