The ruminal protozoal is the important component of the ruminal microorganism.They influence the digestion and utilization of carbohydrate,nitrogenous material,mineral and vitamin in feed directly.

• 瘤胃原虫是瘤胃微生物的重要组成部分,它们直接影响饲料中碳水化合物、含氮物质、矿物质和维生素的消化和利用。