Effects of SiO2 Nanoparticles on Bromus kopetdaghensis Drobov Morphological Characteristics

Effect of SiO2 nanoparticles on rangeland plant of Bromus kopetdaghensis Drobov organs is accomplished through factorial test in a completely randomized design with four replications at Ferdowsi University of Mashhad, in 2014. Treatments included two levels of application (spray and impregnated with seeds), 5 concentrations level of SiO2 nanoparticles (1, 2, 10, 50, and 80 mg/l), and control (no SiO2 nanoparticles). Results showed that increase in concentration of nanoparticles, the plant organs such as height and weight parameters were decreased. However, SiO2 nanoparticles at low concentrations at the application of SiO2 nanoparticles method impregnated with the seed at a concentration of 10 mg/l and spraying nanoparticles at a concentration of 2 mg/l were increased plant height and weight, compared to treatment the control. Application of SiO2 nanoparticles are coated with seed treatments with a concentration of 10 mg/l was shown 24, 66 and 34 percent incensement, respectively for shoot dry weight, root dry weight and height compared to the control treatment. Application of spraying nanoparticles treated with 2 mg was shown 27, 68 and 35 percent incensement respectively for shoot dry weight, root dry weight and height compared to the control treatment. According to Bromus kopetdaghensis D. yield, it is suggested the method of SiO2 nanoparticles application impregnated with seed at a concentration of 10 mg/l due to lower consumption of nanoparticles, ease of nanoparticles use and being economical at natural lands.