Silage making of maize stover and banana pseudostem under South Ethiopian conditions: evolution of pH, dry matter and microbiological profile.,Microbial Biotechnology

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Silage making of maize stover and banana pseudostem under South Ethiopian conditions: evolution of pH, dry matter and microbiological profile.
Microbial Biotechnology ( IF 4.8 ) Pub Date : 2020-07-24 , DOI: 10.1111/1751-7915.13626
Ashenafi Azage Mitiku _{1,

2,

3} , Addisu Fekadu Andeta ₄ , An Borremans _{1,

2} , Bart Lievens _{2,

5} , Sofie Bossaert _{2,

5} , Sam Crauwels _{2,

5} , Ben Aernouts ₆ , Yisehak Kechero ₃ , Leen Van Campenhout _{1,

2}

Affiliation

The study was conducted to evaluate the microbial dynamics during silage of maize stover and banana pseudostem in the environmental conditions of southern Ethiopia. To meet this objective, microsilos containing either maize stover or banana pseudostem, both with and without molasses, were prepared. Subsequently, samples were analysed on day 0, 7, 14, 30, 60 and 90 of the fermentation process. As a result, on day 7, all treatments except banana pseudostem without molasses showed a significant reduction in pH. It was also this silage type that supported the growth of Enterobacteriaceae longer than three other silage types, i.e. until 30 days. The yeasts and moulds and the Clostridum endospore counts also showed a reducing trend in early fermentation and afterwards remained constant until day 90. Illumina MiSeq sequencing revealed that Leuconostoc, Buttiauxella species and Enterobacteriaceae were the most abundant bacteria in the initial phases of the fermentation. Later on, Buttiauxella, Lactobacillus, Weissella and Bifidobacterium species were found to be dominant. In conclusion, silage of the two crop by‐products is possible under South Ethiopian conditions. For banana pseudostem, the addition of molasses is crucial for a fast fermentation, in contrast to maize. Upscaling needs to be investigated for the two by‐products.

中文翻译：

埃塞俄比亚南部条件下玉米秸秆和香蕉假茎的青贮制作：pH 值、干物质和微生物特征的演变。

该研究旨在评估埃塞俄比亚南部环境条件下玉米秸秆和香蕉假茎青贮期间的微生物动态。为了实现这一目标，制备了含有玉米秸秆或香蕉假茎的微型筒仓，其中有或没有糖蜜。随后，在发酵过程的第 0、7、14、30、60 和 90 天对样品进行分析。结果，在第 7 天，除不含糖蜜的香蕉假茎外，所有处理均显示 pH 值显着降低。也正是这种青贮饲料类型比其他三种青贮饲料类型支持肠杆菌科生长的时间更长，即长达30天。酵母和霉菌以及梭状芽胞杆菌内生孢子计数在发酵早期也显示出减少趋势，之后保持恒定，直到第 90 天。Illumina MiSeq 测序显示，明串珠菌属、布蒂奥氏菌属和肠杆菌科是发酵初始阶段最丰富的细菌。后来发现布蒂奥氏菌属、乳杆菌属、韦斯氏菌属和双歧杆菌属占优势。总之，在埃塞俄比亚南部的条件下，两种作物副产品的青贮是可能的。对于香蕉假茎来说，与玉米相比，糖蜜的添加对于快速发酵至关重要。需要对这两种副产品的升级进行研究。

更新日期：2020-07-24

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