摘要
取自行孵化的新出壳ＡＡ公雏鸡５７６只分为两批分别用于Ｎｎ和Ｚｎ的试验。每批分为四组，每组随机地对应高Ｍｎ或高Ｚｎ（高于ＮＲＣ标准５０％），低Ｎｎ或低Ｚｎ（低于ＮＲＣ标准５０％）无Ｍｎ或Ｚｎ和标准Ｍｎ或Ｚｎ（ＮＲＣ标准水平）四种日粮水平的一种．于２，４，６，８，１２，１６，２４，３６，４８，７２，９６，１２０时龄每组分别取雏鸡６只测定卵黄囊中Ｍｎ或Ｚｎ的含量，测定结果进行方差分析和多重比较（ＳＡＳ）．试验表明，雏鸡出壳２小时内卵黄囊Ｍｎ和Ｚｎ的含量分别为０．０１８ｍｇ和０．２２６ｍｇ．日粮中Ｍｎ水平对卵黄囊中Ｍｎ的转移无影响，７２时龄前日粮Ｚｎ水平对卵黄囊中Ｚｎ转移无影响，而此后无Ｚｎ日粮组比高Ｚｎ，低Ｚｎ及标准Ｚｎ组雏鸡卵黄囊中Ｚｎ的转移显著加快（Ｐ≤０．０５）。４８时龄前，卵黄囊中大约７５％的Ｍｎ和８５％的Ｚｎ被转移到雏鸡体内．试验期内日粮Ｍｎ和Ｚｎ的水平对雏鸡增重无影响（Ｐ≥０．０５）但无Ｍｎ及低Ｍｎ日粮组雏鸡在试验后期出现了Ｍｎ的缺乏症状。
newly hatched A A broiler chicks, which were divided into two batches, were usedto the Mn and Zn trlals to determine the transfer of Mn or zn from the yolk sac during yolk sac periedunder different dietary Mn or Zn conditions. Each batch was divided into four groups which wereassigned to one of the four treatments,high Mn or Zn(50%higher than NRC requirement),low Mn orzn(50% low than NRC requirement)none Mn or Zn and standard Mn or Zn(NRC requirementlevel)randomly, At 2,4,6,8,12,16,24,32,48, 72,96 and 120 hours after hatching,6 chicks ineach group were dissected to analyze the Mn and Zn content in the yolk sac.ANOVA and LSD(SAS)were used to process the data,It was indicated that the comtent of Mn and Zn in the yolk sac within 2hours after hatching were about 0.018mg and 0.226mg.The transfer rates of Mn from the yolk sacwere not significantly influenced by the dietary Mn levels (P≥0.05). Before 72 hours of age,thedietary Zn levels did not affect the transfer of Zn from the yolk sac significantly(P≥0.05).72 hoursafter hatching,the transfer of zn from the yolk sac in the none Zn treatment was significantly fasterthan that in tie high,low and standard treatments(P≤0.05).75% Mn and 85%Zn in the yolk sacwere transered befure 48 hours of age. Although the different dietary Mn and Zn levels had nosignificant influence to the weigh gain, chicks in the none Mn treatment group showed the Mndeficiency in the late experimental period.
出处
《西南民族学院学报（自然科学版）》
1995年第1期61-68,共8页
Journal of Southwest Nationalities College(Natural Science Edition)
基金
国家"八五"攻关课题"0~2周龄肉用雏鸡营养参数的研究"
