Lopushniak V., Gritsulyak G., Yakubovsky T., Barchak B., Savyuk R. Formation of energy willow productivity with re-introduction of sewerage

UDC631.8:631:454

 

Lopushniak V.

Gritsulyak G.

Yakubovsky T.

Barchak B.

Savyuk R.

 

Among the sources of renewable fuel in the preserved state at an active pace creates the most important resource as bioenergy, and energy production from biomass of cultural regions. The actualized direction of bioenergy development in Ukraine is the creation of long-term plantations of energy crops, in particular energy willow. In Ukraine, more reliable energy forces reach about 5 thousand hectares. [4, 7]. Leaving the duration of the plantation to ensure a duration of  3 – 4 years and the plantation can reach 20 – 25 years. Increasing the productivity of energy willow plantations and increasing the yield of biofuels per unit area can ensure the application of fertilizers, in particular sewage sludge (SS).
The article presents the results of field research conducted in the Ivano-Frankivsk region on sod-podzolic soils with the using of sewage sludge as fertilizer to determine changes in soil humus and productivity of energy willow of the second cycle of its plantation.
Studies have shown that re-application of sewage sludge before the second cycle of energy use willow plantation increases the content of organic matter in the soil, improves its quality, increases the productivity of agrophytocenosis, including increasing the yield of raw and dry biomass.
According to the results of research, sewage sludge has an active effect after its re-use as fertilizer in the second cycle of use of energy willow plantation. Its application contributes to the increase of the content of organic matter in the soil from 1.51 (control) to 1.81% (SS – 80 t/ha), insoluble residue from 0.63% (control) to 1.03% (SS – 80 t/ha), with an increase in the ratio of Sgk: Sfk from 0.7% to 1.4%, as well as increasing the productivity of agrophytocenosis, in particular the yield of raw 62.0 t/ha and 52.6 t/ha of dry biomass of energy willow. In particular, the application of compost based on sewage sludge and straw (3: 1) at a rate of 20 – 60 t/ha (options 6 – 9) increases the productivity of energy willow by 20.2 – 25.4 t/ha compared to the option without fertilizer application.

Keywords: energy willow, sewage sludge, compost, humus condition of sod-podzolic soil, productivity.

 

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