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Biochar-induced changes in metal mobility and uptake by perennial plants in a ferralsol of Brazil’s Atlantic forest

Biochar 2019年第3期1卷 309-324页

作者： Konstantin von Gunten Magdalena Hubmann Robert Ineichen Yunhai Gao Konhauser OKurt Daniel SAlessi University of Alberta Earth and Atmospheric Sciences1-26 Earth Sciences BuildingEdmontonAB T6G 2E3Canada University of Alberta AgriculturalFood and Nutritional Science410 Agriculture/Forestry CentreEdmontonAB T6G 2P5Canada AgraDEço Rua do MundoParatyRJ 23970-000Brazil

Despite an abundance of short-term studies focusing on biochar’s effects on annual plants,the long-term effects of biochar on perennial plants and the effects of the biochar on the mobility and speciation changes of metals/metalloids not limited to main plant nutrients in soils are poorly *** study reports on the amelioration a sloped orthic ferralsol by biochar from Tibouchina wood and the resulting effects on perennial crops and microbiota,including a comprehensive analysis of metals/metalloids speciation *** were amended with biochar and urine-amended biochar(2 kg/m^(2))and were planted with papaya,banana,and *** and plant materials were analyzed using acid digestions,sequential extractions,and 16S rRNA gene *** applications led to decreased soil acidity,shifted the cation exchange capacity from being Al-influenced to being Mg/K/Ca-dominated,and elevated the concentrations of Mg,K,Ca,Zn,and Ba in *** exchangeable/acid-soluble fraction of Ca,P,and S notably *** soil microbial biome became more species rich and diverse in the biochar-amended *** benefited from biochar applications,demonstrating increased growth,which resulted in generally decreased concentrations of trace elements in most plant parts,however,with an increased total elemental *** amendment contributed to higher concentrations of P,S,and K in soils,but did not further increase plant *** was shown to be a promising soil amendment for agricultural use of orthic ferralsols of the Brazil’s Atlantic forest region,but the accumulation of potentially harmful metals needs to be considered.

关键词： Biochar in agriculture Agroforestry Ferralsol management Trace-metal speciation Biogeochemistry plant metal uptake

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