The effect of adding different levels of zinc oxide to the diet on ovarian activity and reproductive performance of boer goats
This experiment added different levels of zinc oxide to the daily feeding of Boer goats to study the effects on their follicular activity and reproductive performance.Sixty goats were selected for the experiment and evenly divided into four groups,with three replicates in each group and five sheep in each replicate.Respectively for the control group and the experiment Ⅰ(diet+300 mg/kg zinc oxide),experiment Ⅱ(diet+500 mg/kg zinc oxide),and experiment Ⅲ(diet+700 mg/kg zinc oxide).The experimental period is 40 days,and after the experiment,indicators such as follicle activity,reproductive hormones,and reproductive performance are measured.The results showed that compared with the control group,adding different levels of zinc oxide to the diet had a significant effect on the gonadotropin releasing hormone(GnRH),follicle stimulating hormone(FSH),and luteinizing hormone(LH)of Boer goats(P<0.05).Among them,adding 500 mg/kg of zinc oxide had the most significant effect on enhancing follicular activity in Boer goats(P<0.05),with GnRH,FSH,and LH increased by 18.17％,29.34％,and 27.14％,respectively,compared to the control group;Secondly,adding different levels of zinc oxide to the diet also had a significant impact on reproductive hormone indicators such as estradiol(E2)and progesterone(P4)in the serum of Boer goats(P<0.05).Among them,the reproductive hormone indicators in the experimental group Ⅱ showed the most significant difference compared to the control group(P<0.05),with E2 and P4 increasing by 11.56％and 27.93％,respectively.Finally,adding different levels of zinc oxide to the diet also had a significant impact on the reproductive performance of Boer goats(P<0.05).Among them,the experimental group added 500 mg/kg zinc oxide had the most significant differences in the indicators of conception rate,lambing rate,and double lambing rate compared to the control group(P<0.05).The conception rate,lambing rate,and double lambing rate were increased by 30.8％,33.3％,and 33.3％,respectively,compared to the control group.The research results indicate that adding 500 mg/kg of zinc oxide to the diet has the most significant effect on promoting follicular activity and reproductive performance in Boer goats.
NETL
NSTL
万方数据
