بررسی اثرات استفاده از منابع مختلف روغن در جیره فلاشینگ و ارتباط آن با برخی از صفات تولیدمثلی بز مرخز

The present experiment was performed to study the relationship between sources of oil in flushing ration and reproductive efficiency of markhoz goats. for this purpose, the correlation between some blood metabolites and hormone with number of offspring was estimated. thirty-two markhoz goats with average body weight of 44 ± 1.62 kg were used. flushing treatments were including: group a (400 g barley grain), group b1 (93 g sunflower oil), group b2 (88 g soybean oil) and group c or control (basal diet). flushing period started 4 weeks before and continued 2 weeks later of artificial insemination. estrus was synchronized using cidr for 18 days and goats were inseminated with fresh semen 48 h after cidr removing. blood samples collected three times after cidr removal and 20 days after artificial insemination. all of the flushing rations improved fertility and kidding rates (p < 0.01). consumption of fat in the flushing rations, increased birth weight (p < 0.01). there was a significant correlation between blood estrogen, glucose and protein levels in the follicular phase with kidding rate (p < 0.05). a positive correlation was found between estrogen and serum protein with flushing rations (p < 0.02). based on the proposed model, estrogen changes had the greatest impact on the number of offspring among the metabolites at follicular phase (p < 0.01). at 20 days after insemination, a positive and significant correlation was found between progesterone and number of offspring (r= +0.58) (p < 0.01). overall, these results indicate that dietary fat sources and barely during the flushing period improve reproductive traits in markhoz doe.