CAJ | 학술논문

本试验旨在研究在蛋鸡日粮中添加酵母硒和吡啶羧酸铬及其互作对蛋鸡生产性能、脂质代谢及鸡蛋品质的影响.选用320只45周龄海赛克斯蛋鸡随机分为4组,每组4个重复,每个重复20只鸡,在基础口粮中分别添加0 mg/kg吡啶羧酸铬(Ⅰ组)、0.4 mg/kg吡啶羧酸铬(Ⅱ组)、0.5 mg/kg酵母硒(Ⅲ组)、0.4 mg/kg吡啶羧酸铬+0.5 mg/kg酵母硒(Ⅳ组),预饲1周,试验从46周龄持续到50周龄,试验期5周(35 d).结果表明,Ⅲ、Ⅳ组产蛋率极显著提高,料蛋比极显著降低(P<0.01).Ⅱ、Ⅳ组血清总胆固醇含量极显著降低(P<0.01),Ⅲ、Ⅳ组血清高密度胆固醇含量极显著升高(P<0.01).Ⅱ、Ⅲ、Ⅳ组蛋黄中的胆固醇含量与Ⅰ组差异极显著(P<0.01).Ⅲ、Ⅳ组与Ⅰ、Ⅱ组相比,鸡蛋硒含量极显著升高(P<0.01).Ⅲ、Ⅳ组在试验开始到第2周末鸡蛋硒含量极显著升高(P<0.01),从第2周末到第5周末,硒含量基本稳定,4个组均进入平台期.结果显示,吡啶羧酸铬极显著降低了血清及蛋黄中的胆固醇含量.酵母硒极显著提高了产蛋率,降低了料蛋比,并降低了蛋黄中胆固醇含量,提高了鸡蛋中的硒含量.同时添加吡啶羧酸铬和酵母硒极显著提高了产蛋率,降低了料蛋比,并降低了血清及蛋黄中的胆固醇含量,提高了血清中高密度胆同醇含量和鸡蛋中的硒含量.
본시험지재연구재단계일량중첨가효모서화필정최산락급기호작대단계생산성능、지질대사급계단품질적영향.선용320지45주령해새극사단계수궤분위4조,매조4개중복,매개중복20지계,재기출구량중분별첨가0 mg/kg필정최산락(Ⅰ조)、0.4 mg/kg필정최산락(Ⅱ조)、0.5 mg/kg효모서(Ⅲ조)、0.4 mg/kg필정최산락+0.5 mg/kg효모서(Ⅳ조),예사1주,시험종46주령지속도50주령,시험기5주(35 d).결과표명,Ⅲ、Ⅳ조산단솔겁현저제고,료단비겁현저강저(P<0.01).Ⅱ、Ⅳ조혈청총담고순함량겁현저강저(P<0.01),Ⅲ、Ⅳ조혈청고밀도담고순함량겁현저승고(P<0.01).Ⅱ、Ⅲ、Ⅳ조단황중적담고순함량여Ⅰ조차이겁현저(P<0.01).Ⅲ、Ⅳ조여Ⅰ、Ⅱ조상비,계단서함량겁현저승고(P<0.01).Ⅲ、Ⅳ조재시험개시도제2주말계단서함량겁현저승고(P<0.01),종제2주말도제5주말,서함량기본은정,4개조균진입평태기.결과현시,필정최산락겁현저강저료혈청급단황중적담고순함량.효모서겁현저제고료산단솔,강저료료단비,병강저료단황중담고순함량,제고료계단중적서함량.동시첨가필정최산락화효모서겁현저제고료산단솔,강저료료단비,병강저료혈청급단황중적담고순함량,제고료혈청중고밀도담동순함량화계단중적서함량.
An experiment was conducted to study the effects of yeast selenium (SeYst), chromium picolinate (CrPic) and their interaction on performance, lipid metabolism and egg quality of laying hens.Three hundred and twenty 45-week-old H-Sex hens were randomly assigned to four treatments with four replicates each treatment and twenty birds in each replicate.Four dietary treatments were as followings: 1) basal diet with no chromium supplementation (group Ⅰ ); 2) basal diet + 0.4 mg/kg CrPic (group Ⅱ) ; 3) basal diet + 0.5 mg/kg SeYst (group Ⅲ) ; 4) basal diet + 0.4 mg/kg CrPic + 0.5 mg/kg SeYst (group Ⅳ), respectively.The trial lasted for 35 days.The results showed that: 1) laying rate in groups Ⅲ and Ⅳ was signif-icantly increased and ratio of feed to egg was reduced (P<0.01) ; 2) serum cholesterol contents in groups Ⅱ and Ⅳ were significantly reduced (P<0.01), and serum HDL-C contents in groups Ⅲ and Ⅳ were significantly increased (P<0.01); and yolk cholesterol contents in groups Ⅱ,Ⅲ and Ⅳ were significantly reduced compared with those in group Ⅰ(P< 0.01); 3) egg selenium contents in groups Ⅲ and Ⅳ were significantly increased compared with those in groups Ⅰ and Ⅱ (P<0.014);4) egg selenium contents in groups Ⅲ and Ⅳ were increased compared with those in group Ⅰ from starting to 2nd week, and those in groups Ⅰ～Ⅳ reached a relatively steady value from 2nd to 5th week of the trial.These results indica-ted that supplementation of CrPic reduced cholesterol contents in serum and yolk, and supplementation of Se Yst reduced ra-tio of feed to egg and yolk cholesterol content and increased laying rate and egg selenium content.Combination of Se Yst and CrPic increased laying rate, and reduced ratio of feed to egg and cholesterol contents in serum and yolk, and increasd serum HDL-C content and egg selenium content.