Chen Rong, Li Mao, Yang Jinsong, Chen Liwei, Zi Xuejuan, Zhou Hanlin, Tang Jun
Hainan University, Haikou, Hainan, China.
Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan, China.
Front Microbiol. 2022 Sep 8;13:971426. doi: 10.3389/fmicb.2022.971426. eCollection 2022.
In order to better understand the effect of wilting treatment on silage, we study analyzed the fermentation quality of unwilted (CK) and wilted (WT) king grass silage, and the dynamic changes of microorganisms in silage and aerobic exposure. After 30 days of silage, WT silage significantly reduced the pH of the silage () and increased the contents of lactic acid and acetic acid (), but did not reduce the content of Ammonia-N (). Wilting treatment increased bacterial and fungal diversity during silage but decreased fungal diversity during aerobic exposure. The relative abundance of and in wilting silage increased. In the aerobic exposure stage, the relative abundance of decreased, but the relative abundance of increased in wilting treatment silage. In addition, the relative abundance of and increased after 5 days of aerobic exposure. In contrast with unwilted silage, wilting treatment silage after aerobic exposure had no , but the relative abundance of increased. The results showed that wilting treatment could raise the silage quality of king grass. However, WT silage did not inhibit the reproduction of harmful microorganisms during aerobic exposure and did not significantly improve the aerobic stability of silage.
为了更好地了解萎蔫处理对青贮饲料的影响，我们研究分析了未萎蔫（CK）和萎蔫（WT）象草青贮饲料的发酵品质，以及青贮饲料中微生物的动态变化和有氧暴露情况。青贮30天后，WT青贮显著降低了青贮饲料的pH值（），增加了乳酸和乙酸的含量（），但未降低氨态氮的含量（）。萎蔫处理增加了青贮期间细菌和真菌的多样性，但降低了有氧暴露期间的真菌多样性。萎蔫青贮中 和 的相对丰度增加。在有氧暴露阶段， 的相对丰度降低，但萎蔫处理青贮中 的相对丰度增加。此外，有氧暴露5天后， 和 的相对丰度增加。与未萎蔫青贮相比，有氧暴露后的萎蔫处理青贮没有 ，但 的相对丰度增加。结果表明，萎蔫处理可以提高象草的青贮品质。然而，WT青贮在有氧暴露期间并未抑制有害微生物的繁殖，也未显著提高青贮饲料的有氧稳定性。
