期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 621, 期 -, 页码 1057-1065出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2017.10.121
关键词
Biochar; Vermicompost; Acid rain; Cadmium; Biochemical indicators
资金
- Science and Technology Support Program of Sichuan Province [2016NZ0050]
- Agricultural Science and Technology Achievements Transformation Program of Sichuan Province [2017NZZJ008]
- National Science and Technology Supporting Program [2015BAD05B01-5]
This experiment was conducted to investigate the remediation effects of bio-conditioners vermicompost (VC) and biochar (BC) on cadmium contaminated soil under the threat of acid rain, individually and associatively. With the application of soil conditioners, the percentages of HOAc-extractable Cd decreased 5.2-6.8%, 9.0-13.5% and 7.9-12.1% in the groups amended with VC, BC and VC combined BC, respectively. When the pH of rain decreased from 7.0 to 4.0, the activity of acid phosphatase decreased 2.0%, 12.3%, 3.2%, 14.8% in VC, BC, VC combined BC and control groups, individually. This study affirmed that with the application of soil conditioners, the threat of heavy metal along with bioavailability of Cd was depressed, and the properties of soil biochemical indictors were enhanced. Oppositely, the bioavailability of Cd was promoted, and soil microbial viability as well as nutrient contents was inhibited with the spraying of acid rain. The findings indicated that acid deposition played a restrain effect on soil remediation process. Meanwhile, soil conditioners showed potentials to improve soil fertilities and alleviate the stress of acid rain. (C) 2017 Published by Elsevier B.V.
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