SHORT TERM PROGESTAGEN TREATMENT FOR ESTRUS SYNCHRONIZATION AT NULLIPAROUS EWES FROM THE SYNTHETIC POPULATION BULGARIAN MILK

The aim of the present study was to induce synchronized estrus by short-term progestagen treatments plus PMSG at nulliparous ewes from the breed Synthetic Population Bulgarian Milk at the beginning of the estrus season. The experiment was carried out with 30 ewes, divided in 3 groups (each group – n=10). I group – vaginal sponge impregnated with 30 mg FGA for six days, as at the time of the placement of the sponge 125 μg cloprostenolum was put i.m. At the time of the removal of the sponge, 300 UI PMSG was put i.m.; II group – the same as the I group, but without cloprostenolum treatment; III group – control. The applied schemes had good synchronized effect, but low fertility (90% and 66,67%, 22,22% and 33,33 respectively for Group I and Group II)

Effect of application of feeding by norms of lambs from Ile de France breed

SUMMARY The aim of this study was to establish the effect of feeding by norms of female breeding lambs from Ile de France breed. The experiment was carried out in the Institute of Animal Science -Kostinbrod. The experimental animals were divided in 2 groups according to their type of birth -single (11 lambs) and twin (10 lambs). The lambs were equal in age (118±0.91). The experiment continued 90 days. Food intake was controlled daily. The composition of ratio and the amount of forages were according to the requirements of the norms by Todorov and Dardjonov, 1995. The chemical analysis of the forage, which was used, was done by adopted methods The obtained results showed, the applied norm feeding ensured reaching of live weight, which respond to the age and type of birth (singles -50.27 kg, twins -44.7 kg) of the breeding female lambs from Ile de France breed. The average daily intake of forage, energy and protein was 1.626 kg, 1.625, 123.17 g for the singles, and 1.526 kg, 1.5, 116.9 g for the twins. The gain efficiency per 1 kg for forage, energy and protein was 11.70 kg, 11.69 FUG, 886.14 g for the singles and 10.82 kg, 10.64 FUG and 829.08 g for the twins

Score Estimation of Gain of Female Lambs from Ile De France Breed in Bulgaria

ABSTRACT The aim of the study was to made a score estimation of average daily gain of female lambs from Ile de France breed whit different type of birthing in Bulgaria. The study was carried out on 55 female lambs with different type of birth from the flock of Institute of Animal Science -Kostinbrod, born in both following years -2004 and 2005. On the ground of live weight 10, 30 and 70 daily age were calculated average daily gain between 10-30 and 30-70 day of lambs and average of gain, which used for base of determination of score 0 and variation from average gain defined positive or negative score estimation. The age for determination of average daily gain and class interval between the scores was conformable to requirements of selection of Ile de France breed. It has established significant higher average daily gain between 30-70day to singles got score estimation was higher in positive part of chart and the percentage of twins got score estimation was the same in both part of chart