Biometric changes of potatoes (<i>SOLANUM TUBEROSUM
In recent years, the studies of nanometals effect, including silicon, which, as is known, has a positive effect on plants in stressful situations, on soil ecosystems state become topical. We first studied effect of SiO<sub>2</sub> nanoparticles in concentrations with a geometric progression (0.03; 0.09; 0.18; 0.21 and 0.36 g/kg) on potatoes growth and development ( SOLANUM TUBEROSUM ). We have evidenced that on the 14th day of experiment after tubers treatment the germination energy at a NP SiO<sub>2</sub>concentration of 0.09 g/kg there was a significant increase in the length of sprouts by 21.4 % and roots - up to 6.8 % relative to control. Root length stimulation by 27.8-21.0 % was observed at concentrations of 0.18 and 0.21 g/kg. According to the results of field studies, the maximum mass of potato stalks and tubers was observed at a concentration of 0.09 g/kg and 0.18 g/kg of SiO<sub>2</sub> which confirmed the absence of toxic properties of SiO<sub>2</sub> NPs.