Influence of silicon solubilizer on drought tolerance at flowering in Rice (Oryza sativa L.)
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Date
2022-07
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G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145
Abstract
One of the most significant field crops in the world, after wheat, is rice (Orzya sativa L.), which provides millions of people with a stable diet. The needs for food will inevitably increases as the population grows and the climate changes. In addition, climate change has increased the frequency and intensity of a number of abiotic as well as biotic stresses, which has let to considerable losses in important grain species like rice. A field experiment was laid out in split-plot design during the Kharif season of 2020 and 2021 in triplicates with four treatments viz., T1: Control, T2: Si supplemented, T3: Si+Drought stress and T4: Drought stress. Eight genotypes, including 27P63, HRI-174, DRR Dhan-48, IIRRH0143, IIRRH-148, US-312, US-314 and SAHABHAGIDHAN, were examined for a variety of morphological, biochemical and yield characteristics. Analyses of biotic stress incidence and estimations of nutrient content were also performed. Various growth attributes were recorded namely plant height, tiller number, leaf number, LAI, leaf weight, culm weight, TDM at active tillering, panicle initiation and flowering stage. In addition, yield attributes panicle number, spikelet number, spikelet fertility, grain number, test weight and harvest index were found to enhance. Physio-biochemical parameters including MSI, RWC, Chlorophyll content, Gas exchange measurement, carbohydrate, amylose, protein content and SOD activity showed a positive response on application of silicon. A decrease in proline and MDA content was observed. Additionally, there was an increase in the intake of nutrient. It was discovered that silicon had a positive impact on the growth, development, and yield under both normal and drought conditions. For sustainable rice production under climate change conditions, silicon soulubilzer treatment might be utilized to decrease the effects of drought.