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Combining mercapto-functionalized palygorskite with zinc affect cadmium phytoavailability and soil microbial activity in rhizosphere soil
  • +4
  • Yulong Li,
  • Chao Gao,
  • Sashuang Rong,
  • Jialin Gu,
  • Huiwei Zhao,
  • Shiming Su,
  • wei liu
Yulong Li
Hebei University
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Chao Gao
Hebei University
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Sashuang Rong
Hebei University
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Jialin Gu
Beijing Academy of Agricultural and Forestry Sciences
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Huiwei Zhao
National Semi-Arid Agricultural Technology Research Center
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Shiming Su
Chinese Academy of Agricultural Sciences
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wei liu
Hebei University
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Abstract

Cadmium (Cd) pollution in soil pose a grave threat to human health. Combining various approaches to reduce Cd accumulation in crops is an active area of research to remediate farmlands with medium-high levels of Cd contamination. The Mercapto-functionalized palygorskite (PGS-SH) and zinc (Zn) application alone or in combination was investigated to explore reduction of Cd uptake in B. chinensis L and transformation of Cd in soil. The sole application of Zn or PGS-SH increased the biomass of B. chinensis L. and decreased the concentration of Cd in plants, but more improvements were observed from the combined application of Zn and PGS-SH. Low concentration of exogenous Zn (50 mg/kg) significantly increased the soil respiration rate (SRR) and the soil dehydrogenase activity (sDHA), while promoted B. chinensis L. growth while inhibiting Cd uptake. However, excessive exogenous Zn (≥ 200 mg/kg) significantly inhibited B. chinensis L. growth and soil microbial activity. The combined application of PGS-SH and Zn had the highest sDHA (145.59%) and lowest transport factor (TF) (27.59%) compared with the CK. The combination of PGS-SH and Zn fertilizer is a safe and effective means for remediating Cd-contaminated soil and restoring microbial activity.

Peer review status:IN REVISION

17 Mar 2021Submitted to Land Degradation & Development
25 Mar 2021Submission Checks Completed
25 Mar 2021Assigned to Editor
12 Jun 2021Reviewer(s) Assigned
13 Aug 2021Review(s) Completed, Editorial Evaluation Pending
13 Aug 2021Editorial Decision: Revise Major
11 Sep 20211st Revision Received
13 Sep 2021Assigned to Editor
13 Sep 2021Submission Checks Completed