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Effects of flushing and hormonal treatment on reproductive performance of Iranian Markhoz goats

Authors


H. Daghigh Kia, Department of Animal Sciences, Faculty of Agriculture, University of Tabriz, 5166614766 Tabriz, Iran. Tel: +98 411 3392062; Fax: +98 411 3356004; E-mail: daghighkia@tabrizu.ac.ir

Summary

Forty-eight Iranian Markhoz goats were allocated to six groups (n = 8) to study the effect of flushing and hormonal treatments on reproductive performance. Treatments were divided into two categories including, hormonal treatments and flushing. The goats in each group were fed the same basal ration and received one of the following treatments: Groups A and B – injection of GnRH and equine chorionic gonadotropin (eCG) respectively; Groups C, D and E – a supplement of barley grain, soybean oil and sunflower oil in flushing diets, respectively, were offered and Group F – control (only received basal diet). In the flushing treatments, only the source of energy was different between rations. Both hormonal treatments and flushing treatments improved fertility and kidding rates. Treatment B with 16 and control with seven kids represented the highest and the lowest number of progeny respectively. Among flushing treatments, group C resulted in the highest number of kids being 15. Oestrogen levels in follicular phase increased with the injection of eCG and consumption of barley grain. GnRH injection and consumption of oil sources in the diet increased blood progesterone levels during ovulation and post-ovulation periods. Under current market conditions, using hormone or flushing can be profitable for Markhoz goats farmers.

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