Feed composition, and preparation method and application thereof, and method for producing selenium-enriched eggs

The present invention provides a feed composition, a preparation method and an application thereof, and a method for producing selenium-enriched eggs. The feed composition comprises yeast selenium anda basic feed diet, wherein a selenium content of the feed composition is 1.0 mg/kg-1.5 mg/kg. A selenium content of the yeast selenium is 1,500-2,500 mg/kg and preferably 2,000 mg/kg. When an egg production rate of poultries (egg laying chickens) is larger than 90%, the feed composition is used for the poultries (egg laying chickens). The poultries (egg laying chickens) produce the selenium-enriched eggs after 5 days. In the selenium-enriched eggs, a selenium content in egg white reaches 0.68-1.11 mg/kg, a selenium content in egg yolk reaches 0.9-1.8 mg/kg, and a selenium content in whole eggs reaches 0.8-1.3 mg/kg. 本发明提供了种饲料组合物、制备方法、应用及生产富硒蛋的方法。该饲料组合物包括酵母硒和基础饲粮，其中，饲料组合物中硒含量为1.0mg/kg～1.5mg/kg。所述酵母硒中硒含量为1500-2500mg/kg，优选2000mg/kg。禽(蛋鸡)在产蛋率大于90％开始使用饲料组合物。禽(蛋鸡)5天起生产出富硒蛋。所述富硒鸡蛋，蛋清中硒含量达到0.68～1.11mg/kg，蛋黄中硒含量达到0.9～1.8m