Application of biochar and compost improved soil properties and enhanced plant growth in a Pb–Zn mine tailings soil
- 3 December 2022
- journal article
- research article
- Published by Springer Science and Business Media LLC in Environmental Science and Pollution Research
- Vol. 30 (12), 32337-32347
- https://doi.org/10.1007/s11356-022-24488-2
Abstract
This study evaluated the effect of biochar and compost on physiochemical properties, heavy metal content, microbial biomass, enzyme activities, and plant growth in Pb–Zn mine tailings. In this study, a pot experiment was conducted to evaluate the effects of biochar, compost, and their combination on the availability of heavy metals, physicochemical features, and enzyme activities in mining soil. Compared to separate addition, the combined application of biochar and compost was more effective to improve soil pH, soil organic carbon (SOC), total nitrogen (TN), available phosphorus (AP), and potassium (AK). All amendments significantly decreased CaCl2-extractable Pb, Zn, Cu, and Cd. Soil enzyme activities were activated by biochar and compost. Meanwhile, the addition of biochar and compost decreased heavy metal content in plant tissues and increased plant biomass. Pearson’s correlation analysis showed that plant biomass was positively correlated with nutrient levels, microbial biomass, and enzyme activities, whereas it was negatively correlated with CaCl2-extractable heavy metals. These results enhance our understanding of the ecological functions of biochar and compost on the restoration of mining soil and reveal the potential benefit of organic amendments on the improvement of mining soil quality.Keywords
Funding Information
- National Natural Science Foundation of China (42077117, 41622106)
- Key-Area Research and Development Program of Guangdong Province (2019B110207001)
- Guangdong Basic and Applied Basic Research Foundation (2021B1515120039)
This publication has 46 references indexed in Scilit:
- A review of metal (Pb and Zn) sensitive and pH tolerant bioassay organisms for risk screening of metal-contaminated acidic soilsEnvironmental Pollution, 2013
- Effects of soil dilution and amendments (mussel shell, cow bone, and biochar) on Pb availability and phytotoxicity in military shooting range soilEcotoxicology and Environmental Safety, 2012
- Microbial mineralization of biochar and wheat straw mixture in soil: A short-term studyApplied Soil Ecology, 2011
- Stability, solubility and maximum metal binding capacity in metal–humic complexes involving humic substances extracted from peat and organic compostOrganic Geochemistry, 2006
- Oxidation of black carbon by biotic and abiotic processesOrganic Geochemistry, 2006
- Heavy metals fractionation and organic matter mineralisation in contaminated calcareous soil amended with organic materialsBioresource Technology, 2006
- Reactions of compost-derived humic substances with lead, copper, cadmium, and zincChemosphere, 2006
- Microbial biomass and enzyme activities in submerged rice soil amended with municipal solid waste compost and decomposed cow manureChemosphere, 2005
- Measurement of soil microbial biomass C by fumigation-extraction—an automated procedureSoil Biology and Biochemistry, 1990
- Chloroform fumigation and the release of soil nitrogen: A rapid direct extraction method to measure microbial biomass nitrogen in soilSoil Biology and Biochemistry, 1985