Effects Of Angelica And Codonopsis On Performance Of Laying Hens And Research On High Levels Of Trace Elements Transfer Into Eggs

Two experiments were conducted to this study. Experiment1was conducted tostudy the effects of Angelica and Codonopsis mixture on performance of laying hens andegg quality.Experiment2was conducted to study the effects of high levels of traceelements (Fe, Zn, I, Se) transferred into the egg as well as laying performance and eggquality.Experiment1:180healthy disease-free, similar weight,34-week-old Roman henswere choosed and divided into A,B,C,D4groups with3replicates of15hens. Experiment1time was divided into3periods, the first period was34-37weeks of age, the secondperiod was38-41weeks of age, the third period was42-45weeks of age. Experimentdesign was used a single factor design method and the experiment factor was Angelicaand Codonopsis mixed preparation and mixed for proportion of2︰1. Angelica andCodonopsis mixed preparation were added to A,B,C,D4groups for4levels of0%,0.1%,0.2%,0.3%. Egg weight production, laying rate, feed intake and egg qualitywere measurement indicators. The results show that,(1)Egg weight production of group Aat34-37weeks of age was significantly higher than groupB,C,D (P＜0.05)and eggweight production of group C was significantly higher than groupD(P＜0.05).Egg weightproduction of group D at34-45weeks of age and42-45weeks of age was significantlylower than groupA,B,C (P <0.05). Egg weight production of group A,B,C,D at38-41weeks of age were no significant differences (P>0.05).(2) Laying rate of group D at34-37weeks of age,42-45weeks of age and34-45weeks of age was significantly lowerthan groupA,B,C (P <0.05). Laying rate of groupA,B,C were no significant differences(P>0.05).(3) Feed intake of group A at34-37weeks of age was significantly higher thangroup B, C (P <0.05), at42-45weeks of age,34-45weeks of age was significantly higherthan group D(P <0.05). Feed intake of group A,B,C at38-44weeks of age,34-45weeksof age were no significantly differences (P>0.05). Feed intake of groupA,B,C,D at38-41weeks of age were no significant differences (P>0.05).(4) Feed to egg ratio of group D at42-45weeks of age was significantly higher than groupB and C (P <0.05), at34-45weeksof age was significantly higher than group C (P <0.05). Feed to egg ratio of groupA, B, Cat38-45weeks of age,34-45weeks of weeks of age were no significant differences (P>0.05). Feed to egg ratio of groupA,B,C,D at33-37weeks of age were no significantdifferences (P>0.05).(5) Yolk diameter and Haugh unit of group A were significantlyhigher than group B,C,D(P <0.01). Yolk height, eggshell thickness and eggshell strengthof group D was significantly lower than group A (P <0.05). Other indicators of4groupswere no significant differences (P>0.05).Experiment2:90Roman hens that same to experiment1were choosed and dividedinto A and B2groups with3replicates of15hens, group A was the control group whichfed the basal diet, Fe73.5mg/kg,Zn52.6mg/kg,I0.21mg/kg,Se0.23mg/kg wascontained. Group B was the experimental group, Fe573.5mg/kg,Zn452.6mg/kg,I20.21mg/kg,Se2.23mg/kg was contained. This experiment time was divided into3periods,the first period is34-37weeks of age, the second period was38-41weeks of age, thethird period was42-45weeks of age. The results show that,(1) Rrace elements Fe, Zn, I,Se in eggs of group B was significantly higher than group A (p <0.01) The content of Fein group B was3times of group A, the content of Zn in group B was3.1times of groupA, the content of I in group B was14.8times of group A, the content of Se in groupBwas6.7times of group A.(2) Egg weight production of group A34-37weeks of age wassignificantly higher than group B (P <0.05), egg weight production of group A and B indifferent periods were no significant differences (P>0.05).(3) Laying rate of group A andB in different periods were no significant differences (P>0.05).(4) Feed intake of groupA and B in different periods were no significant differences (P>0.05).(5) Feed to eggratio of group A and B in different periods were no significant differences (P>0.05).(6)Yolk diameter and Haugh unit of group B were significantly lower than group A (p<0.01), yolk height, shell thickness, shell strength, egg shape index, egg weight and yolkcolor of group A and B were no significant differences (P>0.05).