摘要
基础日粮中分别添加 3mg·kg-1(Da 1组 )和 5mg·kg-1(Da 2组 )大豆黄酮饲喂产蛋后期绍兴鸭。结果表明 ,Da1组的产蛋率提高 11 5 7% (P <0 0 1) ,Da 2组产蛋率提高 13 33% (P <0 0 1) ;两组平均蛋重都极显著增加 ,日产蛋量分别提高了 13 13% (P <0 0 1)和 16 6 1% (P <0 0 1) ,料蛋比分别降低了 9 4 0 % (P <0 0 1)和 11 4 1% (P <0 0 1) ,并且Da 2组的平均蛋重和日产蛋量均显著高于Da 1组。提示大豆黄酮能显著提高产蛋后期绍兴鸭产蛋性能 ,并呈现剂量效应。两试验组绍兴鸭体重降低幅度极显著低于对照组 ,而卵巢重大于对照组 ,大卵泡数没有差异。Da 1组血清生长激素 (GH)水平提高了 37 5 % (P <0 0 5 ) ,胰岛素样因子 1(IGF 1)水平无显著变化 ;Da 2组血清GH水平提高了4 0 0 0 % (P<0 0 5 ) ,IGF 1水平提高了 10 5 4 % (P<0 0 5 ) 。两试验组雌二醇 (E2 )水平均无显著变化。血清GH和IGF 1水平的相应变化表明 。
Daidzein(Da)was added to the diet of Shaoxing ducks at the dosage of 3 mg·kg -1 (Da 1)and 5 mg·kg -1 (Da 2)during the late stage of egg production cycle.The egg laying rate increased by 11 57%(P<0 01)in Da 1 and 13 33%(P<0 01) in Da 2;the mean egg weight increased apparently in both treatments;the daily egg mass significantly improved by 13 13%(P<0 01)and 16 61%(P<0 01)in Da 1 and Da 2;the feed/egg ratio markedly decreased 9 40%(P<0 01)and 11 41%(P<0 01)respectively.Moreover,Shaoxing ducks treated with 5 mg·kg -1 daidzein had apparently higher mean egg weight and daily egg mass than that with 13 mg·kg -1 daidzein.The results suggest that daidzein can evidently promote egg laying performance of Shaoxing ducks during the later stage of egg production cycle and this action is dosage dependent.Daidzein treatment markedly prevented body weight loss of Shaoxing ducks and increased the weight of ovary compared with the control,but the number of large follicles had no change.Da 1 significantly increased serum levels of GH by 37 5%(P<0 05)but not IGF?1,while,Da 2 significantly increased serum levels of both GH and IGF?1 by 40 00%(P<0 05)and 10 54%(P<0 05)respectively.There were no changes observed in serum levels of E 2 in both experimental groups.The significant increase of serum GH and IGF?1 levels demonstrated that daidzein can improve the capability of reproduction in Shaoxing ducks by regulating endocrine functions.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
2002年第1期73-76,共4页
Journal of Nanjing Agricultural University
基金
国家自然科学基金农业倾斜项目资助 (3 9770 5 40 )
