Іnfluence of aquatic extracts from the rhizomes of Еlytrigia repens l. on the progress of maize seeds

Abstract

Aim. To summarize the results of the study of allelopathic pressure of water-soluble secretions of Elytrigia repens L. in the laboratory. Methods. The rhizomes of creeping wheatgrass were dried to an air-dry state and ground into 3-4 mm particles. To extract, a weighed portion of weed rhizome (0.5, 1 and 10 g) was transferred to a glass container and 100 ml of distilled water at room temperature was added. The extraction process according to the method lasted 1 day at a temperature of +200°C. The experiments were performed with aqueous extracts at a concentration of 1:1000, 1:100 and 1:10. Results. As a result of our research, it was found that the presence of water-soluble secretions from the rhizomes of creeping wheatgrass inhibits the energy of germination of corn seeds, regardless of their level of concentration. On the fourth day of the survey, it was determined that the concentrations of water extracts of wheatgrass 1:100 and 1:10 significantly suppressed the length of the germinal root of corn: 2.37 cm and 2.78 cm, respectively. Measurements of the length of the coleoptile on the 7th day of germination of corn seeds showed a decrease in this indicator in the above options by 29.5% and 30.3%, respectively, compared to the control variant. Also, the total length of the root system in these variants was 44.2% and 44.6% shorter. On the germination and subsequent growth of maize seedlings aqueous extract with a concentration of 1:1000 gave a significant stimulating effect compared to the control variant, in which the seeds were germinated in distilled water. Conclusion. Therefore, depending on the concentration in the aqueous solution of allelopathically active substances from the rhizome of creeping wheatgrass can be either stimulating or inhibiting their effect on the processes occurring during the germination of corn seeds. The results of the research explain the appearance of unfriendly maize seedlings and the lag in the growth and development of cultivated plants in locked areas.