Influence of methods of pre-sowing treatment of wheat seeds with acetic fraction of liquid wood pyrolysis products on germination, root length and growth intensity

The article discusses the effect of pre-sowing treatment of wheat seeds with a solution of wood vinegar on germination, root length and growth intensity. The wood vinegar used in the article is a product of separation of liquid pyrolysis products of wood waste. The pyrolysis liquid was obtained at the industrial fast ablative pyrolysis plant FPP02. The article presents the material balance of the yield of biomass pyrolysis products. The yield of liquid products was 56%. The extraction of wood vinegar took place in laboratory conditions using a rotary evaporator. Analysis of the chemical composition of the isolated wood vinegar by gas chromatography-mass spectrometry (GC-MS) showed a significant content of acetic acid (58.68%), furfural (10.63%), as well as some phenolic compounds (10.69%). To assess the effect of the acetic fraction on sowing, wheat seeds were pretreated with a solution of wood vinegar and water in the following ratios: 1:50, 1:100, 1:200, 1:400. Seeds pretreated in water were studied as a control sample. After treatment, seed germination and root length were evaluated. Then the germinated seeds were planted in the ground to assess the intensity of growth. To do this, measurements were made of the length of the green part of the shoots. The study established both the stimulating and toxic effects of soaking wheat seeds in solutions of wood vinegar. Pretreatment of seeds with wood vinegar led to an increase in seed germination by 10%, an increase in root length by 56%, and an increase in the length of sprouts by 24%. However, the nature of the effect depends on the concentration of wood vinegar in the soaked solution.

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