Abstract
The experiment was carried out in one of the agricultural fields during the agricultural season 2018/2019 of Al- Rumaytha city 25 km north of Almuthanna province, to know the effectiveness of spraying Nano fertilizers of potassium and boron on the yield and growth of wheat crop. The experiment was laid out as split- plot within R.C.B.D. with three replicates were fertilizer of Nano potassium placed in the main plates with three concentrations (zero, 4, 8 gm−1) which symbolized by the symbol (K0, K1, K2) on the sequence, while Nano boron fertilizer was placed in the sub-plates with three concentrations (0, 1.5, 3 mg.L−1) were symbolized by (B0, B1, B2) on the sequence by using the full random sectors R.C.B.D with 3 replicates.Results indicated that spraying by potassium nanoparticles with highest concentration of 8 m. L−1, showed a significant increase in many features of growth and yield, giving the highest mean of chlorophyll content (194.56 mg. m2), and plant height (98.24 cm). In addition, some of the components of the crop and the yield was increased the number of spikes (16.41%), the number of grain spike (8.29%), the grain yield (17.94%) and biological yield (14.31%). There was no significant effect between spray treatment and lack of weight on 1000 grains. In addition, the results showed that there were significant differences when increasing the concentrations of Nano boron in the solution, where concentration about 3 ml. L−1 in content of chlorophyll in leaves and the plant height. In addition, there were significant differences in some traits; the highest concentration (3 ml.l−1) gave the highest average number of spikes (395.90 spikes. m2), the number of grains per spike (56.64 grains.spike−1), total yield of seed (6761 kg.ha−1) and the biological yield (14533 kg. ha−1). While no significant due to boron treatment in the number and weight of 1000 grains.The interaction between spraying Nano potassium and boron showed a significant effect on leaf chlorophyll content and the number of spikes per square meter only.
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