Abstract
ABSTRACT This study aimed to evaluate the storage time effects on whole-plant sorghum silage nutrients fermentation profile, fermentation losses, mycotoxin concentrations and aerobic stability. Sixteen experimental silos (cylindrical bag with 32 cm i.d. and six kg of silage) were used in a completely randomised design to evaluate the following storage times: 45, 90, 180 and 360 days. Storage time linearly increased silage Ammonia-N, propionic and butyric acid concentrations. In addition, treatments had a quadratic effect on silage pH and concentrations of lactic and acetic acids. Storage time did not affect fermentation losses, dry matter recovery and zearalenone concentration. However, storage time linearly decreased silage dry matter concentration and linearly increased deoxynivalenol silage content. Aflatoxin and fumonisin were not identified in silage samples. Storage time linearly increased silage pH regardless of evaluation period, and temperature, 24 h after aerobic exposure. Thus, the storage time of whole-plant sorghum silage affects the fermentation profile, has no effect on fermentation losses, increases deoxynivalenol content and reduces silage aerobic stability.
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