Aerobic Stability of High-Moisture Corn Ensiled with <i>Lactiplantibacillus plantarum</i> During Prolonged Air Exposure
Marija Duvnjak | Igor Bogunović | Kristina Kljak
The evaluation of the aerobic stability of silages primarily involves monitoring temperature, while changes in composition are often neglected. In the present study, the effect of aeration on high-moisture corn ensiled with <i>Lactiplantibacillus plantarum</i> was investigated and compared with that of the control without inoculant. The corn used in this study was grown in five plots in a split-plot experimental design, and each plot represented the repetition of silage preparation, both with and without inoculant. In the silages, the temperature changes and the content of acids and alcohols were monitored during the 6 days of aeration, while the content of the main nutrients was compared before and after 6 days of aeration. The temperature difference between the silages and the environment was below 3 °C during the entire aeration period, regardless of the ensiling method. The content of lactic acid was higher in <i>L. plantarum</i> silages, while the contents of acetic and propionic acid, methanol and ethanol were higher in the control (<i>p</i> < 0.001). The content of all compounds changed during the aeration period (<i>p</i> < 0.05), regardless of the ensiling method and the stable silage temperature. Aeration affected the content of soluble crude protein and starch (<i>p</i> < 0.05), suggesting starch degradation in high-moisture corn during aeration. Therefore, in addition to monitoring silage temperature, monitoring lactic and acetic acid and the main nutrients should be considered, as the nutritional value of high-moisture corn could decrease during aeration.
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