日粮中不同硒源对鸡蛋硒含量的影响.docVIP

日粮中不同硒源对鸡蛋硒含量的影响 　　摘 要：将130日龄海兰蛋鸡324只随机分成9组，1组为对照组，饲以基础日粮；2、3、4、5组在基础日粮中添加02、04、06、08 mg/kg硒的亚硒酸钠；6、7、8、9组在基础日粮中添加02、04、06、08 mg/kg硒的硒代蛋氨酸，自由饮水。采用氢化物-火焰原子吸收法测定鸡蛋中硒的含量。结果显示， 日粮中添加不同浓度亚硒酸钠和硒代蛋氨酸后对蛋鸡体重、产蛋量和蛋重均无显著影响（P005），但对日均采食量有显著影响（P005）；饲料中添加08 mg/kg硒的硒代蛋氨酸，鸡蛋硒含量达0938 μg/g，表明饲料中添加硒代蛋氨酸优于亚硒酸钠。 　　关键词：亚硒酸钠；硒代蛋氨酸；富硒鸡蛋 　　中图分类号：S831.5 文献标识号：A 文章编号：1001-4942（2012）12-0093-05 　　Effects of Different Selenium Sources and Levels in Diets 　　on Selenium Content in Eggs 　　Wang XingHua，Zhang Xuan 　　（College of Life Science，Shanxi University，Taiyuan 030006，China） 　　Abstract Total of 324 healthy 130-day-old Hailan hens were divided into 9 groups randomly. No. 1 group was as the control and fed on basic diets； the No. 2～5 and 6～9 groups were fed on basic diets with the additives of sodium selenite and selenomethionine respectively containing 0.2， 0.4， 0.6 and 0.8 mg/kg selenium. The content of selenium in eggs was detected using hydride-flame atomic absorption spectrometry. The results showed that adding selenite and selenomethionine had no obvious influences on hen weight， egg weight and production（P0.05）， but influenced the daily average feed intake significantly. Compared to the control， the selenium in eggs significantly increased（P0.01）when hens were fed on supplemental selenium， in which， selenomethionine was more efficient than sodium selenite（P0.01）. The selenium content in eggs increased gradually from 7 to 28 days， but did not changed significantly from 28 to 56 days. The selenium content in eggs could reach to 0.938 μg/g if the hens were fed with the additives of selenomethionine containing 0.8 mg/kg selenium. In conclusion， selenomethionine enhanced the selenium content in eggs much more than sodium selenite. 　　Key words Sodium selenite； Selenomethionine； Selenium enriched eggs 　　硒是人体必需的一种微量元素，只占人体重量的万分之一以下，不能在体内合成，必须从食物中摄取。尽管硒在人体内的含量非常少，而且每日摄人量也极微，但却在人体机能中发挥着极其重要的作用。近十几年来，对于硒与人类健康的关系，已成为研究领域十分活跃的课题之一[1]。研究发现硒有诸多生理功能， 如提高机体免疫力、抗氧化、延缓衰老及拮抗某些有毒元素等[2]。最近有研究发现， 微量元素硒对