UTILIZATION OF LEAVES OF WOODY PLANTS IN THE PROCESS OF BIODEGRADATION BY THE FUNGUS PLEUROTUS PULMONARIUS TO OBTAIN A FEED ADDITIVE

This article discusses the problem of ecological utilization of the vegetative part of woody plants, in particular leaves. This waste remains after the deciduous season and pruning of trees used for urban landscaping, and leaf waste is also generated during wood processing and logging. The results of utilization of birch and aspen leaves by the solid-phase cultivation method are presented. The xylotrophic basidiomycete fungus Pleurotus pulmonarius (strain PP-3.2) was used as a biodestructor. The growth parameters of the culture, depending on the type of substrate, were: growth rate 2.4–3.2 mm/day, growth coefficient 42-66 units. The maximum loss of substrate mass after cultivation of 21–24% was noted for post-extraction leaf residues, for green and fallen leaves it is 1.4 times lower. The protein content in the cultivation products fluctuates from 14.4% (birch leaves) to 20.7% a.c.s. (aspen leaves). In the composition of proteins of the obtained products, 10 amino acids have been identified, including four essential (threonine, valine, methionine, isoleucine) and one conditionally essential - histidine. The obtained product can be recommended as a feed additive.