Mechanisms of biochar-mediated alleviation of toxicity of trace elements in plants: a critical review

Springer Science and Business Media LLC - Tập 23 - Trang 2230-2248 - 2015
Muhammad Rizwan1, Shafaqat Ali1, Muhammad Farooq Qayyum2, Muhammad Ibrahim1, Muhammad Zia-ur-Rehman3, Tahir Abbas1, Yong Sik Ok4
1Department of Environmental Sciences and Engineering, Government College University, Faisalabad, Pakistan
2Department of Soil Sciences, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan
3Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, Pakistan
4Korea Biochar Research Centre and Department of Biological Environment, Kangwon National University, Chuncheon, South Korea

Tóm tắt

Trace elements (TEs) contamination is one of the main abiotic stresses which limit plant growth and deteriorate the food quality by their entry into food chain. In recent, biochar (BC) soil amendment has been widely reported for the reduction of TE(s) uptake and toxicity in plants. This review summarizes the role of BC in enhancing TE(s) tolerance in plants. Under TE(s) stress, BC application increased plant growth, biomass, photosynthetic pigments, grain yield, and quality. The key mechanisms evoked are immobilization of TE(s) in the soil, increase in soil pH, alteration of TE(s) redox state in the soil, and improvement in soil physical and biological properties under TE(s) stress. However, these mechanisms vary with plant species, genotypes, growth conditions, duration of stress imposed, BC type, and preparation methods. This review highlights the potential for improving plant resistance to TE(s) stress by BC application and provides a theoretical basis for application of BC in TE(s) contaminated soils worldwide.

Tài liệu tham khảo

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