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Reforestation Impacted Soil Heavy Metal Fractionation and Related Risk Assessment in the Karst Area, Southwest China
Zhang, Qian1; Han, Guilin2; Xu, Xingliang1
2021-07-01
Source PublicationFORESTS
Volume12Issue:7Pages:14
Corresponding AuthorHan, Guilin(hanguilin@cugb.edu.cn)
AbstractHuman agricultural activities have resulted in widespread land degradation and soil contamination in the karst areas. However, the effects of reforestation after agricultural abandonment on the mobility risks and contamination of heavy metals have been rarely reported. In the present study, six soil profiles were selected from cropland and abandoned cropland with reforestation in the Puding karst regions of Southwest China. The Community Bureau of Reference (BCR) sequential extraction method was used to evaluate the compositions of different chemical fractions of soil heavy metals, including Fe, Mn, Cr, Zn, Ni, and Cd. The total contents of Cr, Ni, Zn, Cd, and Mn in the croplands were significantly higher than those in the abandoned croplands. For all soils, Cr, Ni, Zn, and Fe were mainly concentrated in the residual fractions (>85%), whereas Mn and Cd were mostly observed in the non-residual fractions (>65%). The non-residual fractions of Cd, Cr, Ni, and Zn in the croplands were higher than those in the abandoned croplands. These results indicated that the content and mobility of soil heavy metals decreased after reforestation. The individual contamination factor (ICF) and risk assessment code (RAC) showed that Cd contributed to considerable contamination of karst soils. The global contamination factor (GCF) and potential ecological risk index (RI) suggested low contamination and ecological risk of the investigated heavy metals in the croplands, moreover they can be further reduced after reforestation.
Keywordsoil heavy metals chemical fraction calcareous soils risk assessment agricultural abandonment reforestation karst region
DOI10.3390/f12070891
WOS KeywordSEQUENTIAL EXTRACTION PROCEDURE ; AGRICULTURAL SOILS ; ISOTOPE ANALYSIS ; TRACE-ELEMENTS ; ICP-MS ; SPECIATION ; SEDIMENTS ; CATCHMENT ; RIVER ; BCR
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41325010] ; National Natural Science Foundation of China[41661144029]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaForestry
WOS SubjectForestry
WOS IDWOS:000676925700001
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/163696
Collection中国科学院地理科学与资源研究所
Corresponding AuthorHan, Guilin
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.China Univ Geosci Beijing, Inst Earth Sci, Beijing 100083, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Qian,Han, Guilin,Xu, Xingliang. Reforestation Impacted Soil Heavy Metal Fractionation and Related Risk Assessment in the Karst Area, Southwest China[J]. FORESTS,2021,12(7):14.
APA Zhang, Qian,Han, Guilin,&Xu, Xingliang.(2021).Reforestation Impacted Soil Heavy Metal Fractionation and Related Risk Assessment in the Karst Area, Southwest China.FORESTS,12(7),14.
MLA Zhang, Qian,et al."Reforestation Impacted Soil Heavy Metal Fractionation and Related Risk Assessment in the Karst Area, Southwest China".FORESTS 12.7(2021):14.
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