Biochar and microbial synergy: enhancing tobacco plant resistance and soil remediation under cadmium stress

作者：Tianbao Ren, Huilin Feng, Wan Adibah Wan Mahari, Yun Fei, Maosen Li, Nyuk Ling, Xianjie Cai, Guoshun Liu, Rock Keey Liew, Su Shiung Lam · 发表于：Biochar · 年份：2025 · DOI：10.1007/s42773-025-00535-2 · 被引用次数：11 · 研究领域：Soil Carbon and Nitrogen Dynamics、Plant Stress Responses and Tolerance、Plant-Microbe Interactions and Immunity

Abstract The increasing contamination of soil with heavy metals, particularly cadmium, poses a significant threat to agricultural productivity, especially in tobacco cultivation. The primary objective of this study is to explore the impacts of biochar combined with microorganisms on tobacco resistance and soil remediation under cadmium stress. The experiment consisted of four treatments: namely, G0C0 (no cadmium or biochar added), G1C0 (cadmium 130 mg added, no biochar added), G1C1 (cadmium 130 mg added, 10 g kg −1 biochar added), and G1C2 (cadmium 130 mg added, 10 g kg −1 biochar added, and 1% microbial inoculant added). The influence of each treatment on tobacco growth and development, cadmium uptake by tobacco, soil biological characteristics, and components of soil microbial communities was investigated. The study revealed that cadmium stress had a negative impact on tobacco net photosynthesis. Notably, biochar was found to be effective in alleviating this effect. The results demonstrated that Apparent Quantum Yield (AQY), Maximum Photosynthetic Rate (Pmax), and Light Saturation Point (LSP) in G1C1 increased by 1.69%, 80.50%, and 30.76%, respectively, compared to G1C0. Similarly, AQY, Pmax, and LSP in G1C2 increased by 3.39%, 86.84%, and 62.35%, respectively. Following cadmium contamination, the levels of soil urease, catalase activity, and microbial biomass nitrogen and carbon were reduced. However, the application of biochar significantly enhanced urease and catalase ac...