Reforestation Impacted Soil Heavy Metal Fractionation and Related Risk Assessment in the Karst Area, Southwest China

doi:10.3390/f12070891

	Reforestation Impacted Soil Heavy Metal Fractionation and Related Risk Assessment in the Karst Area, Southwest China
	Zhang, Qian 1; Han, Guilin 2; Xu, Xingliang 1
刊名	FORESTS
	2021-07-01
卷号	12 期号:7 页码:14
关键词	soil heavy metals chemical fraction calcareous soils risk assessment agricultural abandonment reforestation karst region
DOI	10.3390/f12070891
通讯作者	Han, Guilin(hanguilin@cugb.edu.cn)
英文摘要	Human 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.
资助项目	National Natural Science Foundation of China[41325010] ; National Natural Science Foundation of China[41661144029]
WOS关键词	SEQUENTIAL EXTRACTION PROCEDURE ; AGRICULTURAL SOILS ; ISOTOPE ANALYSIS ; TRACE-ELEMENTS ; ICP-MS ; SPECIATION ; SEDIMENTS ; CATCHMENT ; RIVER ; BCR
WOS研究方向	Forestry
语种	英语
出版者	MDPI
WOS记录号	WOS:000676925700001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/163695]
专题	中国科学院地理科学与资源研究所
通讯作者	Han, Guilin
作者单位	1.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
推荐引用方式 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.