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Alelopathic effect of camelina sativa plant residues on soybean and sunflower seeds germination

Plants influence each other due to their release of physiologically active substances into the environment. Allelopathic influence can be positive or negative, which must be taken into account when planning crop rotations, selecting green manure and ground cover crops, and arranging compatible crops. This issue is relevant сamelina sativa – a promising oilseed crop. The aim of our research was to study the allelopathic effect of сamelina sativa plant residues on the germination rates of sunflower and soybean seeds. As a result of the conducted research, the dependence of laboratory seed germination, root system development, height and mass of seedlings of the studied crops on the concentration of plant residue extract was revealed. Soybean seeds germination on extracts of camelina plant residues had an inhibitory effect. At a concentration of 1:100 the allelopathic activity index (RI) was -0.05, the inhibitory effect was observed for all growth indicators except for the root system development. At a concentration of the extract of 1:50 the RI index was -0.09, and at a concentration of 1:10 it was -0.13. An extract with a concentration of 1:100 had a low stimulating effect on sunflower seeds germination (RI = 0.04), at the indicated concentration the inhibitory effect was detected only on the seedling height. At a concentration of 1:50 the allelopathic index was -0.12, the highest inhibitory effect was recorded on the laboratory germination of seeds (RI = -0.26). The generalized index of allelopathic activity of the extract at a concentration of 1:10 was -0.31 ranging from -0.26 for seedling mass index to -0.41 for root system development. Thus, the analysis of allelopathic effect of camelina sativa plant residues on soybean and sunflower seeds germination was carried out. It was identified that crop residues extract at a concentration of 1:100 has a positive effect on sunflower seedlings development, and increased concentrations inhibit growth processes. All tested concentrations of camelina biomass extraction have a negative effect on soybean seeds germination.

Key words: camelina sativa, soybean, sunflower, allelopathy, seed germination, seedlings.

Lіubchenko A. https://orcid.org/0009-0003-1845-1280


Lіubchenko I. https://orcid.org/0009-0009-6474-0589


Riabovol Ja. https://orcid.org/0000-0003-4325-5313


Riabovol L.


Serzhuk O.


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AGROBIOLOGY №2 2025