THE EFFECT OF THE COMBINED EFFECT OF 10-100 HZ VIBRATION AND Fe3O4 NANOPARTICLES ON THE EARLY STAGES OF ZEA MAYS L. DEVELOPMENT AND THE HORDEUM VULGARE L.

The effect of the combined action of vibration with a frequency of 10–100 Hz and Fe3O4 nanoparticles on the early stages of development of Zea mays L. and Hordeum vulgare L. was investigated. It was found that when using iron nanoparticles with a concentration of 2.4 mg/ml, the germination energy of sugar corn seeds increased by 36 %, germination by 64 %, and the length of seedlings increased by 5 %. Concentrations of 1.2 mg/ml, 2.4 mg/ml, and 0.8 mg/ml showed a stimulating effect. The concentration of 1.6 mg/ml nanoparticles significantly affected the ontogenetic and morphometric parameters of common barley. The length of the stem, in contrast to the control group, increased by 5 %, and the diameter by 15 %. The root length increased by 15 % on average, and the diameter by 21 %. The remaining concentrations used for the experimental part of the work showed an inhibitory or neutral effect. It was also found that under the influence of vibration in the range of 10–100 Hz, with additional seed treatment with a concentration of Fe3O4 – 2.4 mg/ml, the body's development process is uneven. The samples show the greatest sensitivity to vibration at the first stages of development, starting from the moment of germination of seeds and emergence of seedlings. Frequencies of 10, 20, 50, and 80 Hz had a greater inhibitory effect, while 40, 60, and 70 Hz had a stimulating effect. The stimulating effect of the combined action of vibration and nanoparticles (1.6 mg/ml) on the aboveground part of common barley was detected at frequencies of 10 and 20 Hz (low frequency range). The increase in morphometric parameters was ~ 30 % of the control values. For the root system, the stimulating effect was observed at frequencies of 70–100 Hz. The length of the root system was on average 26–41 % longer than the control. There were no significant differences in stem length at frequencies of 10 and 20 Hz. A significant inhibitory effect of vibration was detected at a frequency of 30 Hz.