原料及发酵剂对苹果渣发酵饲料酵母菌活菌数及纯蛋白质含量的影响  

Study on the effect of material and microbe composition on pure protein content and viable yeast counts in apple pomace's fermentation feedstuff

作　　者：郭志英[1] 郭俏[1] 来航线[1] 薛泉宏[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《饲料工业》2015年第11期40-43,共4页Feed Industry

基　　金：国家科技支撑计划项目[2012BAD14B11]资助

摘　　要：采用固态发酵法研究了原料及发酵剂组成对苹果渣发酵产物中酵母菌活菌数与纯蛋白质含量的影响。结果表明:1在苹果渣中添加油渣或豆粕均可提高发酵产物中酵母菌活菌数和纯蛋白质含量,其中添加油渣效果优于豆粕。在酵母菌与黑曲霉的混菌发酵中,苹果渣+油渣处理的纯蛋白含量较苹果渣对照提高40.1%,酵母菌为1.88×1010CFU/g。2采用混合发酵剂时,发酵产物中的酵母菌数量均高于酵母菌单独接种,且适当加大酵母菌接种量(Candida utilis:Aspergillas niger=10:1)能大幅度提高发酵产物中酵母菌活菌数和纯蛋白质含量。3苹果渣发酵产物中酵母菌活菌数与纯蛋白质含量的变化趋势相同,即能提高纯蛋白含量的工艺措施对酵母菌活菌数有同样的增加作用。The study was conducted to investigate the effect of material and microbe composition onpure protein content and viable yeast counts in apple pomace＇s solid-state fermentation feedstuff. Theresult showed that： 1When adding oil foot or legumin to apple pomace, pure protein content and via-ble yeast counts in fermentation product were higher than those of pure apple pomace respectively,and adding oil foot had a better effect; When fermentated with yeast（Candida utilis, Cu） and Aspergil-lus niger（UA8）, the increment rate of pure protein content in the fermentation product of apple pom-ace and oil was 40.1% compared with that in the fermentation product of apple pomace, and the viableyeast counts was 1.88×1010CFU/g. 2Both pure protein content and viable yeast counts in fermenta-tion product inoculated with mixed-strains were higher than those in fermentation product inoculatedwith single-strain respectively. Additionally, appropriate increase in proportion of yeast Cu to UA8（Cu？？UA8=10？？1） could raise the protein content of fermentation product and viable yeast counts. 3The pure protein content and viable yeast counts in apple pomace＇s fermentation feedstuff showed asimilar tendency, and the fermentation technology that could increase pure protein content of fermenta-tion product had the same effect on the viable yeast counts.

关 键 词：苹果渣 发酵饲料 单细胞蛋白 黑曲霉 酵母菌 

分 类 号：S816.6[农业科学—饲料科学]