| 摘要: |
| 【目的】研究鸡蛋游离棉酚（FG）残留与蛋鸡日粮棉酚水平及饲喂期限的关系。【方法】选480只30周龄健康的海兰褐蛋鸡随机等分为5个处理组，每个处理组设6个重复。预饲期1周，试验期24周。试验设玉米 豆粕基础日粮组(对照组)及含50，100，150，200 g/kg棉粕日粮组（FG含量分别为43.15，86.30，129.45，172.60 mg/kg），研究高棉粕饲粮对蛋鸡生产性能、蛋品质以及鸡蛋FG残留量的影响。【结果】用不同棉粕水平日粮饲喂蛋鸡24周，当日粮FG含量达到129.45 mg/kg时，能显著降低产蛋率、平均蛋质量和日采食量，料蛋比显著升高；当日粮FG含量达到172.60 mg/kg时，能显著降低蛋壳强度和蛋黄颜色。鸡蛋 FG残留测定结果表明，试验第12周，当蛋鸡每日平均FG摄入量分别为5.29，10.26，15.04，19.09 mg时，鸡蛋FG残留分别为20.64，31.86，39.13，43.32 mg/kg；试验第24周，当蛋鸡每日平均FG摄入量分别为5.02，9.83，14.24，17.55 mg时，鸡蛋FG残留分别为27.38，42.40，45.17，53.44 mg/kg。【结论】日粮棉粕添加量不宜超过100 g/kg，否则会影响蛋鸡生产性能和蛋品质；鸡蛋中FG残留量随FG摄入量的增加而增加；随着饲养期限的延长，鸡蛋中FG残留率提高。 |
| 关键词: 蛋鸡 棉粕 日粮 饲养期限 鸡蛋棉酚残留 |
| DOI： |
| 分类号: |
| 基金项目:国家现代农业产业技术体系专项（CARS-41-S23） |
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| Effects of free gossypol level in diet and feeding period on free gossypol residue in eggs |
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HUA Peng-huan,LI Fang-long,WANG Zhe-peng,et al
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| Abstract: |
| 【Objective】The experiment studied the effects of free gossypol (FG) level in diet and feeding period on FG residue in eggs.【Method】480 Brown laying hens at the age of 30 weeks were assigned to 5 treatments,with 6 replicates per treatment.The preparation period lasted for 1 week and the experimental period lasted for 24 weeks.1 control group fed with corn-soybean basal diet and 4 experimental groups fed with diets containing 50,100,150 and 200 g/kg cotton seeds,respectively.The FG contents in diets of experimental groups were 43.15,86.30,129.45 and 172.60 mg/kg,respectively.During the experimental period,production performance,egg quality and FG residue in the eggs were measured.【Result】Feeding 129.45 mg/kg FG for 24 weeks to hens significantly decreased egg production,average egg weight and daily feed intake,while increased feed conversion ratio significantly.Eggshell strength and yolk color in the group fed with 172.60 mg/kg FG for 24 weeks were significantly lower (P<0.05) than that of the control.On week 12,the FG residues were 20.64,31.86,39.13 and 43.32 mg/kg when the daily FG intakes per hen were 5.29,10.26,15.04 and 19.09 mg,respectively.On week 24,the FG residues were 27.38,42.40,45.17 and 53.44 mg/kg when daily FG intakes per hen were 5.02,9.83,14.24 and 17.55 mg,respectively.【Conclusion】The cotton seed content in diet should not exceed 100 g/kg to avoid the effects on productivity and eggs quality.FG residues in eggs increased significantly with the increase of FG level in diets and the extension of feeding period. |
| Key words: laying hens cottonseed meal diet feeding period residual FG in eggs |
