The quality of silage of corn grain and spent P. [Pleurotus] ostreatus mushroom substrat
2007
Adamovic, M.J.,Institute for Technology of Nuclear and Other Raw Materials, Belgrade (Serbia) | Bocarov-Stancic, A.S.,Bio-Ecological Center, Zrenjanin (Serbia) | Milenkovic, I.M.,Horticulture Consulting, Padinska Skela (Serbia) | Strbac, S.S.,Bio-Ecological Center, Zrenjanin (Serbia) | Adamovic, I.D.,Faculty of Agriculture, Belgrade - Zemun (Serbia)
The chemical composition, fermentation quality, mycological and mycotoxicological analyses of silage maxture, made of ground corn grain and spent Pleurotus ostreatus mushroom substrate, were investigated. Dry matter content in high moisture ground corn, at the time of ensiling was 70% and in the spent substrate (on the Salt Cedar wood shaving basis) was 52.7%. Corn grain to spent substrate ratio in trials was: 100:0% (1st), 90:10% (2nd), 80:20 (3rd) and 70:30% (4th), respecitively. Content of the lignocellulose fractions in silage was slightly increased, and protein content was slightly decreased with the increase of spent substrate content. Contents of the VFA (volatile fatty acids) in silage, pH value, and NH3-N content were for the silage of very good quality. In the spent substrate 9 mold species were found, from which the most frequent were genus Penicillium, Paecilomyces variotii, and Trichoderma harzianum. In ground corn grain silage (1st) presence of the yeasts was dominant (90.000/g). In combined trials (2nd-4th) only Penicillium (P. brevicompactum and P. echinulatum) mold species were found. Presence of molds and yeasts in investigated trials was within tolerated values for ensiled feedstuffs. Mycotoxin presence in silage was not determined.
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