摘要
为提高玉米秸秆饲料的营养价值,首先,通过添加不同发酵剂确定最佳发酵剂为纤维素酶和酵母菌混合物;然后,通过单因素试验和正交试验,优化酶菌协同发酵玉米秸秆生产蛋白饲料的工艺,考察了发酵时间、酶菌比例、料液比和发酵温度对玉米秸秆发酵饲料粗蛋白含量的影响。结果表明,最佳工艺条件为:发酵时间48 h,酶菌混合比例8︰15,料液比1︰20,温度35℃。在此条件下,发酵产品的粗蛋白含量达29.71%,较发酵前提高4.67倍。
To improve the nutritional value of corn straw protein feed,the protein feed was produced by cellulase and yeast with corn stalk as raw material. Firstly,by comparing different fermentation agents,the optimum type was cellulase and yeast mixture. Secondly,by single factor and orthogonal experiments,the best process conditions of cellulase and yeast co-fermentation were determined. The effects of fermentation time,ratio of cellulase and yeast,solid-liquid ratio and temperature were investigated. The results showed the optimum conditions were as follows: fermentation time of 48 h,ratio of cellulase and yeast of 8︰15,solid-liquid ratio of 1︰20,and temperature of 35 ℃. Under the optimum conditions,the crude protein content of the fermented products reached 29. 71%,which was 4. 67 times higher than that before fermentation.
出处
《河南农业科学》
CSCD
北大核心
2016年第12期161-164,共4页
Journal of Henan Agricultural Sciences
基金
华北理工大学校级大学生创新项目(X2014081)
