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50,100,150,200g/kg棉粕日粮组(FG含量分别为43.15,86.30,129.45,172.60mg/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129.45mg/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172.60mg/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5.29,10.26,15.04,19.09mg时,鸡蛋FG残留分别为20.64,31.86,39.13,43.32mg/kg;试验第24周,当蛋鸡每日平均FG摄入量分别为5.02,9.83,14.24,17.55mg时,鸡蛋FG残留分别为27.38,42.40,45.17,53.44mg/kg。【结论】日粮棉粕添加量不宜超过100g/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。
[Objective] The experiment studied the effects of free gossypol （FG） level in diet and feed- ing 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 experimen- tal 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 dai- ly 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 rag, 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 rag,re- spectively. [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 di- ets and the extension of feeding period.
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2014年第3期23-27,33,共6页
Journal of Northwest A&F University(Natural Science Edition)
基金
国家现代农业产业技术体系专项(CARS-41-S23)
关键词
蛋鸡
棉粕
日粮
饲养期限
鸡蛋棉酚残留
laying hens
cottonseed meal
diet
feeding period
residual FG in eggs
