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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (4): 15-18.

所属专题： 畜牧兽医

• 畜牧 动物医学 蚕 蜂 • 上一篇    下一篇

两种铬源对热应激肉鸡生长性能和屠宰性能的影响

王立,李文立,姜建阳,朱凤华,任慧英   

  • 收稿日期:2009-09-15 修回日期:2009-11-21 出版日期:2010-02-20 发布日期:2010-02-20

Effects of Two Chromium Sources on Production and Slaughter Performance in Heat Stressed Broilers

  • Received:2009-09-15 Revised:2009-11-21 Online:2010-02-20 Published:2010-02-20

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摘要：

【实验目的】本试验旨在研究不同铬源（酵母铬和烟酸铬）对热应激肉鸡生长及屠宰性能的影响。【方法】选择15日龄AA肉仔鸡180只，随机分为3组，1组为对照组，饲喂基础日粮(不加铬)，2组为添加酵母铬组，3组为添加烟酸铬组，铬添加量均为3 mg/kg，每个组6个重复，每个重复10只鸡，试验期4周。【结果】试验结果表明：日粮中补铬3 mg/kg显著提高了15~28 d、29~42 d热应激肉鸡日增重、饲料消耗和饲料转化效率(P<0.05)，不同铬源差异不显著(P>0.05)。于28、42日龄，每处理随机抽取18只，每重复3只，屠宰测定屠宰指标。结果表明：28 d时两种铬源对肉鸡的屠宰率、半净膛率、全净膛率均未产生显著影响(P>0.05)，但腹脂率显著降低(P<0.05)；42 d时试验组对肉鸡的半净膛率、全净膛率无显著影响(P>0.05)，屠宰率显著高于对照组，腹脂率显著低于对照组(P<0.05)；试验组之间差异不显著(P>0.05)。【结论】因此，日粮中添加酵母铬和烟酸铬能改善热应激肉鸡的生长性能和屠宰性能，不同铬源之间差异不显著。

关键词: 苎麻, 苎麻, 木质素生物合成代谢, 4-香豆酸辅酶A连接酶, 基因克隆

Abstract:

【OBJECTIVE】The experiment was conducted to study the effect of two different chromium sources (CrY and CrNic) on production and slaughter performance in heat stressed broilers.【METHOD】One hundred and eighty Arbor Acres (AA) broilers at the age of 15day were selected and divided into three treatments with six replicates of ten chicks in each replicate. Three treatments were supplemented 0(control group)、3 mg/kg chromium (CrY) and 3 mg/kg chromium (CrNic). The experiment lasted four weeks.【RESULTS】It was concluded that supplemental Cr 3.0 mg/kg influenced significantly on daily gain, feed consumption, feed/gain of 15~28、29~42 day(P<0.05 ). On the 28th and 42th day, 18 broilers in each group were selected randomly and slaughtered, and the slaughter performances were determined. The results showed that CrY or CrNic did not influence significantly on dressing percentage, percentage of semi-eviscerated yield and eviscerated yield at 28 d (P>0.05), but the abdominal fat percentage of experimental groups were lower than the control group significantly (P<0.05). At 42 day, the experimental groups did not influence significantly on percentage of semi-eviscerated yield and eviscerated yield(P>0.05), but the abdominal fat percentage of experimental groups were lower than the control group significantly(P<0.05), and dressing percentage were higher than control group significantly(P<0.05), there was no significant difference between experimental groups (P>0.05).【CONCLUSION】It was concluded that the CrY and the CrNic could improve the production and slaughter performance of the heat stressed broilers, but it was no significant difference between the two chromium sources.