Effects of Cellulase and Lactic Acid Bacteria on Ensiling Performance and Bacterial Community of Caragana korshinskii Silage
文献类型： 外文期刊
作者： Bai, Baochao 1 ; Qiu, Rui 1 ; Wang, Zhijun 1 ; Liu, Yichao 1 ; Bao, Jian 1 ; Sun, Lin 3 ; Liu, Tingyu 4 ; Ge, Gentu 1 ; Jia, Yushan 1 ;
作者机构： 1.Inner Mongolia Agr Univ, Minist Agr & Rural Affairs, Key Lab Forage Cultivat Proc & High Efficient Util, Hohhot 010019, Peoples R China
2.Inner Mongolia Agr Univ, Key Lab Grassland Resources, Minist Educ, Hohhot 010019, Peoples R China
3.Inner Mongolia Acad Agr & Anim Husb Sci, Hohhot 010031, Peoples R China
4.Inner Mongolia Minzu Univ, Coll Agr, Tongliao 028000, Peoples R China
关键词： lactic acid bacteria; cellulase; microbial community; fermentation characteristics; Caragana korshinskii
期刊名称：MICROORGANISMS （ 影响因子：4.5； 五年影响因子：4.8 ）
ISSN：
年卷期： 2023 年 11 卷 2 期
页码：
收录情况： SCI
摘要： The aim of this study was to evaluate the effects of cellulase (CE) and lactic acid bacteria (LAB) on Caragana korshinskii silage by analyzing the fermentation parameters, chemical composition, and bacterial community. The Caragana korshinskii was harvested at the fruiting period and treated with cellulase and LAB alone as a control treatment with no additive (CK). The ensiling performance and bacterial community were determined after 3, 7, 15, 30, and 60 days of fermentation process. Compared with the CK group, the pH, dry matter loss, and ammonia nitrogen content were significantly (p < 0.05) decreased in the LAB and CE treatments. Compared with the CK and LAB group, the contents of acid detergent fiber, neutral detergent fiber, and acid detergent lignin in the CE group decreased significantly (p < 0.05), and the water-soluble carbohydrates, acetic acid, and lactic acid concentrations increased significantly (p < 0.05). At the genus level of microorganisms, the addition of cellulase and LAB significantly reduced the microbial diversity. Compared with the CK group (78.05%), the relative abundance of Lactiplantibacillus in the CE group (90.19%) and LAB group (88.40%) significantly (p < 0.05) increased. The relative abundance of Pediococcus in the CE group (3.66%) and LAB group (2.14%) was significantly (p < 0.05) lower than that in the CK group (14.73%). Predicted functional profiling of 16S rRNA genes revealed that the addition of cellulase and LAB increased the pyruvate metabolic pathway during Caragana korshinskii silage, thereby increasing the accumulation of lactic acid concentration. The addition of cellulase expressed a better advantage in the biosynthetic capacity of lysine. In summary, the addition of cellulase and LAB could adjust the bacterial community to improve the silage quality of Caragana korshinskii, and the addition of cellulase exhibited better results than the LAB additives.
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