皂苷是一类对反刍动物瘤胃发酵有调控作用的植物次级代谢产物。
Saponin is a type of plant secondary metabolite, which contributes to the modulation of rumen fermentation.
此外，这类微生物活性代谢产物可通过发酵进行大量生产，无原材料后顾之忧，不会破坏植物资源。
Besides, it can solve the problem of materials and plants protection that metabolites from microbiology can be enlarged by the way of fermentation.
这说明R9G发酵产物中对植物病原真菌的抑制物质主要集中在乙酸乙酯相中；
These showed that the mainly inhibiting substance of R9G were in acetyl acetate phase.
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