Agriculture and forestry

Okrushko Svetlana Evgenivna – Candidate of Agricultural Sciences (PhD), Senior Lecturer of the Department of Botany, Genetics and Plant Protection of Vinnitsia National Agrarian University (210083, Vinnitsia, Soniachna Str. 3, e-mail: osy@vsau.vin.ua).

This article summarizes the results of the study of the allelopathic effect of water-soluble secretions from the rhizomes of creeping wheatgrass on the germination of wheat seeds. In field conditions, the chemical effect of Elytrigia repens L. on the growth of all agricultural crops is characterized as inhibitory. Therefore, the purpose of the article was to establish in laboratory conditions the phytotoxicity of water extracts from the rhizomes of Elytrigia repens L. at various concentrations on the germination of wheat seeds and further development of seedlings. In the course of research, we established that the presence of allelopathically active substances of creeping wheat inhibits the energy of wheat seed germination in all experimental variants. The water extract in a ratio of 1 to 1000 had a stimulating effect on seed germination and further growth of wheat seedlings compared to the control option, in which its seeds were germinated in distilled water. An increase in the concentration of water extracts of creeping wheatgrass (1:100; 1:50; 1:20 and 1:10) directly proportionally led to a significant inhibition of the growth of the germinal root of wheat. The lag of indicators in length ranged from 0.34 cm (1:100) to 1.32 cm (1:10) on the fourth day of accounting. Further measurements of both the length of the germinal root and the total length of the root system of wheat confirmed the prolongation of the negative impact of wheatgrass emissions. The stem length of wheat seedlings also depended on the concentration of allelochemical substances of Elytrigia repens L. in Petri dishes: it decreased with increasing concentration. According to the above options, during the accounting on the 7th day, the decrease in the indicator was from 44.4% (1:100) to 95.9% (1:10) in relation to the control option. That is, the allelopathically active water-soluble substances of Elytrigia repens L. can have a stimulating or inhibiting effect on the germination process of wheat seeds, depending on their concentration level.

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