Effect of Different Treatments on Superovulation of Simmental Cattle in Pasture

In order to study the superovulation technology of Simmental cattle under grazing condition,three schemes(A: FSH+PG;B: FSH+PG+GnRH;C: FSH+PG+CIDR+ GnRH) with domestic and imported FSH respectively were performed.The results showed the number of available embryos of the three schemes were 3.43±2.41,5.93±3.54 and 7.21±3.19 respectively with the domestic FSH.The average number of available embryos in scheme B,C were higher than that of scheme A(P0.05) with domestic FSH.The average number of available embryos in scheme C was the highest among schmes A,B and C,then there was no significant differences between B and C(P0.05);the available embryos number of the three schemes were 4.34±2.71,6.76±3.79 and 7.79±4.23 respectively with the imported FSH.The average number of available embryos in scheme C was the highest and there was no significant differences between B and C(P0.05),however B and C were higher than scheme A(P0.05).There were no significant difference between the domestic FSH and imported FSH groups for the average number of available embryos.It was concluded that scheme C was the best among the whole three schemes,then scheme B,and the scheme A was the worst;There was no significant difference between the domestic FSH and imported FSH groups,however,considering the price of domestic FSH is much lower than imported FSH,the better choice is domestic FSH.