Abstract
This study evaluates the effect of lignocellulosic substrate obtained after hydrogen dark fermentation of food waste on plant growth using the radish Raphanus sativus L as an example. Addition of substrate at concentrations of 66 and 132 g/m2 into plain sand caused a strong inhibitory effect on seed germination and root and shoot growth, while a concentration of 33 g/m2 showed significant positive effect with 40% higher seed germination and 90% higher survival after drought stress compared to plain sand. Application of lignocellulosic substrate increased the amount of ammonifying and free-living heterotrophic diazotrophic bacteria that may act as plant probiotics supplying mineral nitrogen for plant nutrition in arid conditions. Preliminary results suggest that lignocellulosic substrate may be used as biofertilizer.
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