Effects of Qizao extract on production performance,egg quality reproductive hormones and follicle development of Yugan black-bone chickens
This experiment was conducted to investigate the effects of Qizao extract on the laying performance,egg quality,reproductive hormones and follicle development of Yugan black bone chickens.A total of 120 Yugan black-bone chickens with good body condition at 240 days of age were randomly divided into 4 groups,with 6 replicates in each group and 5 chickens in each replicate.The control group was fed a basal diet.The experimental group added 100,200,400 mg/kg of Qizao extract.The adaptation period lasted for 56 days.The results showed that:(1)The Qizao extract had no effect on the egg production rate,feed-to-egg ratio,average egg weight and average daily feed intake of Yugan black-bone chickens(P＞0.05).(2)The yellowness of egg shells of Yugan black bone increased linearly with the increase of Qizao extract(P＜0.05),and the Haugh unit,egg yolk index and eggshell redness showed a quadratic curve(P＜0.05).(3)On the 28th day of the experiment,the E2 content in the serum of Yugan black-bone chickens showed a quadratic curve with the increase of the concentration of Qizao extract(P＜0.05),and the FSH and LH contents increased linearly with the increase of the concentration of Qizao extract(P＜0.05);On the 56th day of the experiment,the extract of Qizao extract had no significant effect on the serum E2,FSH and LH content of Yugan black-bone chickens(P＞0.05).(4)ESRβ and GnRH1 in the ovary of Yugan black-bone chickens increased linearly with the increase of Qizao extract(P＜0.01),and FSHR showed a quadratic curve with the increase of Qizao extracts(P＜0.05).It was concluded that the addition of Qizao extract to the diet had no significant effect on the performance of Yugan black-bone chicken,but could improve egg quality,reproductive hormone content and receptor expression.Under the conditions of this experiment,the suitable addition amount was 200 mg/kg.
Yugan black-bone chickensproduction performanceegg qualityreproductive hormonesfollicle development
万方数据
维普
