浙江农业学报 ›› 2023, Vol. 35 ›› Issue (12): 2818-2829.DOI: 10.3969/j.issn.1004-1524.20230127

• 动物科学 • 上一篇    下一篇

不同复合益生菌对藜麦秸秆发酵饲料的发酵工艺优化

张喜闻1(), 郭晓农1,2,3,*(), 王泽兴1, 王亚玲1   

  1. 1.西北民族大学 生命科学与工程学院,甘肃 兰州 730030
    2.西北民族大学 生物医学研究中心 生物工程与技术国家民委重点实验室,甘肃 兰州 730030
    3.西北民族大学 生物医学研究中心 中国-马来西亚国家联合实验室,甘肃 兰州 730030
  • 收稿日期:2023-02-08 出版日期:2023-12-25 发布日期:2023-12-27
  • 作者简介:张喜闻(1999—),男,贵州黔东南人,硕士研究生,主要从事饲草料资源开发与利用研究。E-mail: caideyu2020@126.com
  • 通讯作者: *郭晓农,E-mail:gxnwww@126.com
  • 基金资助:
    中央高校基本科研业务费专项资金(31920220136);国家自然科学基金(31760242)

Optimization of fermentation process of quinoa straw fermented feed with different compound probiotics

ZHANG Xiwen1(), GUO Xiaonong1,2,3,*(), WANG Zexing1, WANG Yaling1   

  1. 1. College of Life Science and Engineering, Northwest University for Nationalities, Lanzhou 730030, China
    2. Key Laboratory of Bioengineering and Technology of State Ethnic Affairs Commission, Biomedical Research Center, Northwest University for Nationalities, Lanzhou 730030, China
    3. China-Malaysia National Joint Laboratory, Biomedical Research Center, Northwest University for Nationalities, Lanzhou 730030, China
  • Received:2023-02-08 Online:2023-12-25 Published:2023-12-27

摘要:

本试验通过不同益生菌配伍发酵藜麦秸秆饲料,探究复合益生菌发酵藜麦秸秆饲料的最佳发酵工艺。试验选取乳酸菌、酵母菌、解淀粉芽孢杆菌为发酵菌剂,由乳酸菌和酵母菌、乳酸菌和解淀粉芽孢杆菌组成不同比例配伍,设置三因素三水平的正交试验,每种复合菌剂发酵藜麦秸秆饲料包括9个试验组,同时设置空白对照组,试验中的三因素分别为藜麦秸秆饲料发酵的混菌比例,发酵时间和发酵含水量,每个因素下设置3个水平分别为混菌比例1∶1、1∶2、2∶1;发酵含水量为50%、60%、70%,通过设置短期(3 d、5 d、7 d)和长期(10 d、20 d、30 d)发酵藜麦秸秆,检测不同试验组藜麦秸秆发酵后的营养指标,确定藜麦秸秆优势发酵菌种及发酵工艺,并通过响应面法优化处理,获得最优发酵工艺。试验结果表明,当发酵条件设置含水量为60%,发酵时间为30 d,乳酸菌和酵母菌菌剂添加比例为1∶2时,藜麦秸秆饲料营养含量变化较为显著。乳酸菌和酵母菌长期发酵藜麦秸秆饲料其效益更显著,乳酸菌和解淀粉芽孢杆菌短期和长期发酵藜麦秸秆饲料都对其具有一定的促进作用。综上所述,藜麦秸秆饲料的最佳发酵工艺为,发酵菌剂(乳酸菌和酵母菌)的比例为1∶2,含水量为60%,发酵时间为30 d,此时藜麦秸秆饲料的粗蛋白、粗脂肪、粗纤维、粗灰分含量分别为14.68%、3.67%、24.37%、11.26%,经响应面法优化后粗蛋白、粗脂肪、粗纤维、粗灰分的含量分别为14.69%、3.71%、24.36%、11.22%。

关键词: 复合益生菌, 乳酸菌, 酵母菌, 解淀粉芽孢杆菌, 藜麦秸秆, 工艺优化

Abstract:

In this experiment, different probiotics were used to ferment quinoa straw feed to explore the optimal fermentation process of compound probiotics to ferment quinoa straw feed. In the experiment, Lactobacillus, Saccharomyces cerevisiae and Bacillus amyloliquefaciens were selected as fermentation agents, which were composed of Lactobacillus and Saccharomyces cerevisiae, Lactobacillus and Bacillus amyloliquefaciens in different proportions, and an orthogonal experiment with three factors and three levels was set up. Each compound agent fermented quinoa straw feed included 9 test groups, and a blank control group was set at the same time. The three factors in the test were the mixed bacteria ratio of quinoa straw feed fermentation, fermentation time and fermentation water content. The three levels were set as follows: the mixed bacteria ratio of 1∶1, 1∶2, 2∶1; fermentation water content of 50%, 60%, 70%, by setting short-term (3 d, 5 d, 7 d) and long-term (10 d, 20 d, 30 d) fermentation of quinoa straw, the nutritional indicators of quinoa straw after fermentation were detected in different test groups, the dominant fermentation strains and fermentation process of quinoa straw were determined, and the treatment was optimized by response surface method to obtain the optimal fermentation process. The test results showed that when the fermentation conditions were set at a water content of 60%, a fermentation time of 30 days, and a ratio of 1∶2 of Lactobacillus and Saccharomyces cerevisiae inoculants, the nutritional content of quinoa straw feed changed significantly. Long-term fermentation of quinoa straw feed by Lactobacillus and Saccharomyces cerevisiae had more significant benefits, and both short-term and long-term fermentation of quinoa straw feed by Lactobacillus and Bacillus amyloliquefaciens could promote it to a certain extent. In summary, the optimal fermentation process for quinoa straw feed was that the ratio of fermentation agents (Lactobacillus and Saccharomyces cerevisiae) was 1∶2, the water content was 60%, and the fermentation time was 30 days. At this time, the crude protein, crude fat, crude fiber, and crude ash contents of the quinoa straw feed were 14.68%, 3.67%, 24.37%, and 11.26% respectively, and the contents of crude protein, crude fat, crude fiber, and crude ash were 14.69%, 3.71%, 24.36%, 11.22% respectively after optimization by response surface methodology.

Key words: compound probiotics, Lactobacillus, Saccharomyces cerevisiae, Bacillus amyloliquefaciens, quinoa straw, process optimization

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