Effect of inoculants and fibrolytic enzymes on the fermentation characteristics, in vitro digestibility and aflatoxins accumulation of whole‐crop corn silage
2017
Li Ying, Han | Borjigin, Narisu | Yu, Zhu
Two additives (bacterial inoculants and fibrolytic enzymes) were tested for their effects on fermentation characteristics, in vitro digestibility, mold counts and aflatoxin (B₁, B₂, G₁ and G₂) content in corn silages. Whole‐plant corn was harvested with one‐half milk line stage and ensiled after the following treatments: (i) untreated (CON); (ii) bacterial inoculants at 10⁵ CFU g⁻¹ of fresh forage (B); (iii) fibrolytic enzymes at 100 U g⁻¹ of fresh forage (E); and (iv) mixture of bacterial inoculants and enzymes at 10⁵ CFU g⁻¹ and 100 U g⁻¹ of fresh forage, respectively (B+E). All the additives increased the lactic acid content and in vitro dry matter digestibility (P < 0.05), decreased ammonia nitrogen content (P < 0.05). E and B+E decreased the neutral detergent fiber content and increased the crude protein, in vitro digestibility of neutral detergent fiber and crude protein (P < 0.05). Aflatoxins content and mold counts for treated silage were lower than untreated silage (P < 0.05) throughout the air exposure stages (0, 1, 5, and 10 days). Additionally, the aflatoxins were not detected in B treated silage after 0 day exposure to air and in B+E throughout the air exposure stages.
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