Impact of foliar application of nano micronutrient fertilizers and titanium dioxide nanoparticles on the growth and yield components of barley under supplemental irrigation

Abstract

Nano-fertilizers are new generation of the synthetic<em> </em>fertilizers which contain readily available nutrients in nano scale range. Nano fertilizers are preferred largely due to their efficiency and environment friendly nature compared to conventional<em> </em>chemical<em> </em>fertilizers. To evaluate the effects of foliar spray<em> </em>of micronutrient nano-fertilizer (iron and zinc) and nano-titanium dioxide (nTiO<sub>2</sub>) solution on grain yield and its components in barley under supplemental<em> </em>irrigation conditions, a field experiment was carried out in the semi-arid highland region of Maragheh, Iran. Barley plants were separately treated with of chelated nano-scale zinc oxide (ZnO) and ferric oxide (Fe<sub>2</sub>O<sub>3</sub>) suspensions during tillering stage, booting and milky stages. Results revealed that days to<em> </em>anthesis and maturity significantly increased after application of both nano-fertilizers. Furthermore<em>,</em> a considerable improvement was observed in grain mass, spike length, number of the grains per spike, chlorophyll content, grain yield and harvest index by application of nano-fertilizer. However the impact of nano zinc fertilizer was more prominent than iron. Foliar application of nTiO<sub>2</sub> positively affected some morphophysiological characteristics like as days to<em> </em>anthesis, chlorophyll content and straw yield. The results suggest that the delivery of Zn into barley seedling through spray of nano-fertilizer can be an efficient nutrient management strategy in semi-arid regions. Overall, our result indicated that the integration of nanotechnology in fertilizer products can improve fertilizer use efficiency and significantly increase of barley yield. However, plant response to nanoparticles significantly depend on concentration and time of application as well as size, shape, and surface functionalization of the particles.

The effects of silicon and titanium on safflower (Carthamus tinctorius L.) growth under moisture deficit condition

“…It was found that, nanoanatase TiO 2 promotes antioxidant stress by decreasing the accumulation of superoxide radicals, hydrogen peroxide, and malonyl dialdehyde content while enhancing the activities of superoxide dismutase, catalase (ascorbate peroxidase), and guaiacol oxidase, thereby increasing the evolution oxygen rate in spinach chloroplasts under UV-B radiation (Lei et al, 2008).. Khot et al (2012) concluded that, the nano size of TiO 2 might have increased the absorption of inorganic nutrients, accelerated the breakdown of organic substances, and also caused quenching of oxygen free radicals formed during the photosynthetic process, hence increasing the photosynthetic rate. This finding supports our previous research which showed that foliar application of nTiO 2 on barley plants in a semi-arid region positively affected growth rate and seed yield (Janmohammadi et al, 2016a). It seems that, nTiO 2 plays a significant role in activatingdefense mechanism and modulating biosynthesis of phytohormones such as cytokinins and gibberellin (Mandeh et al, 2012).…”

The Effects of Micronutrients (Fe And Zn) and Beneficial Nano-Scaled Elements (Si And Ti) on Some Morphophysiological Characteristics of Oilseed Rape Hybrids

“…Results of this study showed that foliar application nano-fertilisers and nano beneficial particles significantly affected seed yield which corroborate the findings of a great deal of our previous work on barley under supplemental irrigation in semi-arid region (Janmohammadi et al 2016). The results of cluster analysis revealed that the effects of foliar treatments were different on cultivars.…”

“…The first factor was foliar treatment included control (check; no traetment), nano-chelated Fe (2,000 ppm), nano-chelated Zn (2,000 ppm), nano-Ti (20 ppm), nano-Si (20 ppm). The concentrations were selected according to the results of previous experiments in the region (Janmohammadi et al 2016;Janmohammadi et al 2017). The consumption rate was 100 cc/m 2 .…”

Two Iranian Rice Cultivars’ Response to Nitrogen and Nano-Fertilizer

“…Nitrogen as one of the main nutrients in agricultural production, might be given only very few parts to plant and soil need, though reports stated that using very small nanofertilizer particles is more effective than this rate [45]. The researchers suggested that nano-fertilizers considerably influenced the straw yield and grain yield [46] …”