Effect of Phosphorous, Potassium Nano-Fertilizers and Spraying of (Sepehr 4) Nano-Fertilizer and Carbon Nanotubes on the Growth and Yield of Rice (Oryza sativa L.)

Abstract

Abstract The purpose of this experiment is to compare the growth and yield of the Amber 33 cultivar of rice after being fertilised with nano-phosphorous and nano-potassium, as well as after being sprayed with carbon nanotubes and nano-synthetic fertiliser (Sepehr 4) (K+Fe+Zn+Mn). Between June 15 and November 23, 2022, researchers in Babylon province, Iraq, combed through the area known as District 41-Al-Hussainiya, which is located to the south of the city of Hilla. Using a Randomised Complete Blocks Design (RCBD), two levels of phosphorus and potassium nano-fertilizers (0 and 10 kg.ha-1) were applied to some treatments, while other treatments included spraying with nanomaterials, such as carbon nanotubes (at a concentration of 50 mg L-1) and Sepehr 4 nano-fertilizer (K+Fe+Zn+Mn) (at a concentration of 10 mg L-1). The results of the statistical analysis of the Duncan test showed that the four-component combination (nano-phosphorous+nano-potassium+spraying carbon nanotube+synthetic nano-fertilizer) (K+ e+ Zn+ Mn) recorded the highest values in plant height (134.5) cm and biological yield (20.710) Meg ha-1, grain yield was (6.067) Meg ha-1, the concentration of nitrogen in the grain was (1.40)%, and the percentage of protein in the grain was (8.331)%, and the combined effect was (phosphorus nano-fertilizer+carbon nanotubes +sepehr 4 synthetic nano-fertilizer achieved the highest index of chlorophyll at (42.63) SPAD, The combined effect of the combination (P nano-fertilizer + carbon nanotube +(K+Fe+Zn+Mn)) and Spray Nano(K+Fe+Zn+Mn) solo achieved the highest significant increase in the Clearance % (68,780 and 68,670)%respectively. While spraying the carbon tubes alone achieved the highest field efficiency of (7958.000) kg kg-1