Influence of Silicon Solubilizer on Drought Tolerance at Flowering in Rice Oryza Sativa L

Abstract

One of the most significant field crops in the world, after wheat, is rice (Orzya newlinesativa L.), which provides millions of people with a stable diet. The needs for food will newlineinevitably increases as the population grows and the climate changes. In addition, newlineclimate change has increased the frequency and intensity of a number of abiotic as well newlineas biotic stresses, which has let to considerable losses in important grain species like rice. newlineA field experiment was laid out in split-plot design during the Kharif season of 2020 and newline2021 in triplicates with four treatments viz., T1: Control, T2: Si supplemented, T3: Si+ newlineDrought stress and T4: Drought stress. Eight genotypes, including 27P63, HRI-174, newlineDRR Dhan-48, IIRRH0143, IIRRH-148, US-312, US-314 and SAHABHAGIDHAN, newlinewere examined for a variety of morphological, biochemical and yield characteristics. newlineAnalyses of biotic stress incidence and estimations of nutrient content were also newlineperformed. Various growth attributes were recorded namely plant height, tiller number, newlineleaf number, LAI, leaf weight, culm weight, TDM at active tillering, panicle initiation newlineand flowering stage. In addition, yield attributes panicle number, spikelet number, newlinespikelet fertility, grain number, test weight and harvest index were found to enhance. newlinePhysio-biochemical parameters including MSI, RWC, Chlorophyll content, Gas newlineexchange measurement, carbohydrate, amylose, protein content and SOD activity newlineshowed a positive response on application of silicon. A decrease in proline and MDA newlinecontent was observed. Additionally, there was an increase in the intake of nutrient. It was newlinediscovered that silicon had a positive impact on the growth, development, and yield newlineunder both normal and drought conditions. For sustainable rice production under climate newlinechange conditions, silicon soulubilzer treatment might be utilized to decrease the effects newlineof drought. newline