Effects of Bromocriptine Mesilate and Clomifene Citrate on Reproductive Hormones Level and Laying Performance of Silky Hens

The effects of bromocriptine mesilate and clomifene citrate on reproductive hormones level,broody days,laying performance of broodying silky hens were studied.36 broodying silky hens were allotted randomly to 3 groups: group Ⅰ was the control,group Ⅱ were given bromocriptine mesilate per os for 2 days(1.25 mg/d per hen),then clomifene citrate for 5 days(12.5 mg/d per hen);Group Ⅲ were given bromocriptine mesilate 0.625 mg/d per hen for 2 days and 1.25 mg/d per hen for 2 days,then given clomifene citrate 25 mg/d per hen for 2 days and 12.5 mg/d per hen for 1 day.The results showed that estrogen content of group Ⅱ was obviously higher than that of group Ⅰ(P0.05),and group Ⅲ was obviously higher than group Ⅰ and Ⅱ(P0.01).The average brooding days was 6.67 days in group Ⅱ,6.83 days in group Ⅲ,and 8.58 days in the control group.Average lay rate within 30 days was 37.72%(control group),59.65%(group Ⅱ),and 53.51%(group Ⅲ),respectively,the trial groups were obviously higher than the control group(P0.05).Average egg size of control group,group Ⅱ,group Ⅲ were 43.86 g,44.65 g and 44.16 g respectively,and average egg shape index were 1.306,1.312 and 1.323 respectively,and average egg shell thickness were 0.327 mm,0.338 mm and 0.332 mm respectively.The effects of bromocriptine mesilate and clomifene citrate on egg size,egg shape,and egg shell thickness was not obvious(P0.05).