PJB-2025-240
Effect of calcium doped biochar on Hemp (Cannabis Stiva) productivity against salt induced oxidative stress
Asma Azad
Abstract
Soil salinity, particularly in coastal regions, is increasingly becoming a major constraint to plant productivity. The application of biochar as a soil amendment has gained considerable attention for its potential to mitigate salt-induced stress in plants. In this study, rice husk-derived biochar was prepared via pyrolysis at 400 °C and doped with calcium to enhance its effectiveness. The biochar was applied to saline-alkali soils in which hemp (Cannabis sativa) seeds were cultivated under various salt concentrations. Control groups without biochar treatment were also maintained. Plant growth parameters, productivity, and biochemical responses were measured to evaluate the effect of carbon-doped biochar under salt-induced oxidative stress. Results showed that biochar application significantly reduced soil bulk density and exchangeable sodium percentage, while enhancing chlorophyll a and b content, total phenolics, protein levels, organic matter, and cation exchange capacity. Calcium doping further improved the effectiveness of biochar in reducing sodium toxicity and minimizing the presence of harmful soluble compounds. The findings suggest that carbon-doped biochar can be a promising amendment for improving saline-alkali soils and enhancing the medicinal and antioxidant properties of hemp.
Keywords: Hemp, Oxidative stress, Carbon-doped, Biochar, Salinity Biochar, Cannabis sativa, Salinity stress, Antioxidants, Cannabinoids, Nutrient uptake.
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