瘤胃酵母菌的筛选及应用研究进展

酵母菌含有丰富的菌体蛋白质和二十多种氨基酸,是动物机体所需优质蛋白质和氨基酸的重要来源,且含有极为丰富的维生素E和B族维生素,有利于满足反刍动物的全价营养需要,促进其生长发育。此外,酵母菌还有平衡瘤胃的微生物区系、减少甲烷等有害气体的产生、稳定瘤胃pH等功能。酵母菌制剂可促进动物的生长发育、改善机体的消化机能、加强动物的免疫力,因而在畜牧业中作为纯天然的饲料添加剂而被广泛应用。该文主要从瘤胃源酵母和酵母菌制剂对反刍动物瘤胃内环境的调控作用、影响机制及其生理功能等方面进行了综述,以期为后续的科研工作和实际生产提供一定的参考依据。

Progress in Screening and Application of Rumen Yeast

Yeast is rich in mycoprotein and more than 20 kinds of amino acids,which is an important source of highquality protein and amino acids required by animal organisms.It is also rich in vitamin E and B vitamins,which can provide sufficient nutrient substance and abundant somatomedin for animal's growth.In addition,the yeast also has the functions of regulating the micro-ecological balance in the rumen,reducing the production of harmful gases such as methane,and stabilizing the rumen pH of the ruminant.The yeast preparation can promote growth and development of animals,improve the digestive function of the body,and enhancing the immunity of the animal,and thus is widely used as a natural feed additive in the animal husbandry.In this paper,in order to provide a reference for subsequent scientific research and actual production,the regulation of rumen-derived yeast and yeast preparations on the rumen environment of ruminants,the influencing mechanism and the physiological functions were reviewed.