Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 704, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2019.135410
Keywords
Crops; Safely grown; Microbial diversity; Bacteria; Fungi
Categories
Funding
- China Agriculture Research System [CARS-10-B24, CARS-23-A03]
- Forestry Science and Technology Innovation and Promotion Project of Jiangsu province [LYKJ(2018) 37]
- National Natural Science Foundation of China [41571307, 31901180]
- China Postdoctoral Science Foundation [2019M651845]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Su Caijian [123]
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The proper disposal of copper (Cu) polluted plant residues after phytoremediation has attracted extensive attention. In this study, the Cu-polluted biogas residue produced through anaerobic digestion was applied directly. Wheat, soybean and pakchoi were grown in pots for four seasons over two years. The application dosage of Cu-polluted biogas residue was evaluated by measuring growth conditions of crops, Cu content in edible parts, and amelioration of saline-alkali soil. The results showed that the biomass of the crops, the content of soil organic matter, total N and available P and microbial diversity can be improved, and the Cu concentration of the edible parts was all lower than limit standard. Amendment with 2% biogas residue enhanced the growth of beneficial bacteria and fungi, and decreased the relative abundances of potentially pathogenic fungi in the saline-alkali soil. The results of this study provide a basis for the safe utilisation of copper-polluted plant residues. (C) 2019 Elsevier B.V. All rights reserved.
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