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Effects of Cellulase and Xylanase on Fermentation Characteristics, Chemical Composition and Bacterial Community of the Mixed Silage of King Grass and Rice Straw

文献类型： 外文期刊

作者： Qiu, Chenchen 1 ; Liu, Nanbing 1 ; Diao, Xiaogao 2 ; He, Liwen 1 ; Zhou, Hanlin 3 ; Zhang, Wei 1 ;

作者机构： 1.China Agr Univ, Coll Anim Sci & Technol, State Key Lab Anim Nutr, Beijing 100193, Peoples R China

2.Sanya Inst China Agr Univ, Sanya 572024, Peoples R China

3.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Minist Agr & Rural Affairs Germplasm Resources Con, Key Lab,Minist Agr & Rural Affairs Crop Gene Resou, Danzhou 571737, Peoples R China

4.Chinese Acad Trop Agr Sci, Zhanjiang Expt Stn, Zhanjiang 524000, Peoples R China

关键词： fibrolytic enzyme; king grass; mixed silage; rice straw; silage quality

期刊名称：MICROORGANISMS （ 影响因子：4.5； 五年影响因子：4.8 ）

ISSN：

年卷期： 2024 年 12 卷 3 期

页码：

收录情况： SCI

摘要： This study was to investigate the effects of cellulase and xylanase on fermentation characteristics, nutrient composition and the bacterial community of the mixed silage of king grass and rice straw. Lab-scale bag silage was produced and seven groups were studied: blank control (CK); added 1%, 2% cellulase (CE1, CE2); added 1%, 2% xylanase (XY1, XY2); and added 0.5% cellulase +0.5% xylanase, 1% cellulase +1% xylanase (CX1, CX2). The results showed that the application of additives in six treated groups exerted a positive effect on lactic acid (LA) content and their pH values decreased significantly (p < 0.05). The addition of cellulase and xylanase decreased (p < 0.05) the content of neutral detergent fiber (NDF) and acid detergent fiber (ADF) significantly and increased (p < 0.01) the crude protein (CP) and water-soluble carbohydrate (WSC) content. Filter paper enzyme activity (FPA) declined and xylanase activity (XA) intensified (p < 0.05) as ensiling was prolonged, where most of the enzymatic treatments (especially XY2, CX2) resulted in increased enzyme activities. Moreover, the addition of cellulase and xylanase reduced the abundance of harmful bacteria such as Acinetobacter and Klebsiella and increased the abundance of lactic acid bacteria such as Lacticaseseibacillus, Lactiplantibacillus. In conclusion, the addition of cellulase and xylanase would improve fermentation quality and nutrient preservation via altering the bacterial community, with 1% cellulase or complex enzyme best.

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