Phytotesting of Liquid Products of Wood Pyrolysis on Seeds of Higher Plants

An effective method for processing lignocellulosic raw materials into marketable products is the pyrolysis method. With this method, a water-soluble fraction is formed, which has a rather narrow range of applications. The purpose of this work was to determine the effect of the water-soluble fraction of the pyrolysis liquid and wood vinegar in different dilutions on seed germination and root length and biomass of seedlings of higher plants. The pyrolysis liquid was obtained using the rapid pyrolysis method. Widespread food crops were selected as test crops: white mustard, arugula, radish, dill, curly parsley, lettuce, seed peas and oats. In dilutions of the water-soluble fraction of the pyrolysis liquid (1:200, 1:400 and 1:900), a statistically significant stimulating effect was observed on the germination of radish seeds, and root growth stimulation in radish seedlings was revealed when using dilutions of 1:200, 1:300, 1:400 and 1:900. The 1:900 dilution of the water-soluble fraction of the pyrolysis liquid contributed to the stimulation of seed germination and root growth of seedlings in oats, as well as to arugula seed germination. A statistically significant stimulating effect of wood vinegar was established on the germination of radish seeds using a 1:100 dilution, as well as on the growth of the roots of seedlings and the accumulation of raw biomass by the roots of lettuce seedlings in dilutions of 1:400 and 1:900.