Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (9): 1866-1876.DOI: 10.3969/j.issn.1004-1524.2022.09.06

• Animal Science • Previous Articles     Next Articles

Optimization of fermented quinoa straw with lactic acid bacteria by response surface methodology

LYU Jing(), WU Zhiyong, GUO Xiaonong, FENG Yulan, LU Jianxiong, CHAI Weiwei()   

  1. College of Life Science and Engineering, Northwest Minzu University, Lanzhou 730030, China
  • Received:2021-08-20 Online:2022-09-25 Published:2022-09-30
  • Contact: CHAI Weiwei

Abstract:

In this study, the fermentation time, addition amount of lactic acid bacteria and water content of straw were selected as three factors. The effects of different fermentation conditions on crude protein content of fermented quinoa straw were explored via single-factor experiments and response surface methodology. Response surface analysis results showed that the effects of 3 factors on crude protein content of fermented quinoa straw decreased as addition amount of lactic acid bacteria>water content of straw>fermentation time, and the optimized fermentation parameters were as follows: fermentation time of 24.5 d, addition amount of lactic acid bacteria of 12 mg·kg-1, and the water content of straw of 60%. Under the optimal conditions, the crude protein content of the fermented quinoa straw was (6.93±0.05)%. These results could provide basis for the development of quinoa straw feed.

Key words: quinoa straw, lactic acid bacteria, response surface methodology, crude protein content

CLC Number: