Biochar is an organomineral tool for mitigation of Cd toxicity in rice embedded soil and plant.

Cadmium (Cd) contamination poses a significant threat to plants and human, as it can easily accumulate in plant tissues, leading to biochemical and physiological disorders. There is a growing interest in using biochar to mitigate the absorption of heavy metals by rice plants. This study tested peach biochar (PB) and its various levels of applications to evaluate the promising level for Cd remediation in contaminated soil. The application of PB3 had a significant impact on Cd mitigation, with extractable Cd (AB-DTPA) in soil decreasing from 66 mg kg−1 to 18 mg kg−1. Cd content in shoots decreased from 2.5 mg kg−1 to 0.9 mg kg−1, and in grains decreased from 1.1 mg kg−1 to 0.5 mg kg−1. Moreover, the PB treatment led to increased rice yield, from 4.9 to 10 g pot−1, and biological yield, from 4 to 20 g pot−1. The soil also showed improved organic matter content, increasing from 0.4% to 0.7%, and enhanced levels of nitrogen (N), phosphorus (P), and potassium (K), by increases from 2.1 g pot−1 to 5 g pot−1, 58 mg kg−1 to 83 mg kg−1, and 40 mg kg−1 to 63 mg kg−1, respectively. These findings demonstrate the potential of PB in mitigating Cd contamination in soil and reducing its uptake by rice plants. NOVELTY STATEMENT: Heavy metals are the major environmental challenges that have the potential to significantly impact agricultural productivity, ecosystem health, and human well-being. PB emerges as a sustainable shield against Cd pollution. Harnessing the power of PB, a promising solution to safeguard soils from Cd contamination. Transforming waste into wealth and recycling of plant nutrient, PB remarkable ability to mitigate Cd heavy metal hazard and enhance soil fertility and productivity. [ABSTRACT FROM AUTHOR]