Distribution and pollution of soil heavy metals of different land-use patterns under converting polder back into wetlands at Dongting Lake Area
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    Abstract:

    Based on plot data of poplar forestland soil (Ⅰ1,9 a; Ⅰ2,6 a; Ⅰ3,4 a; Ⅰ4,2 a),garden-land soil (vegetable soil and fruit soil) (Ⅱ),nonirrigated farmland soil (Ⅲ1,cotton soil; Ⅲ2,sugar cane soil; Ⅲ3,maize soil),irrigated farmland soil (rice soil) (Ⅳ) and wasteland soil (Ⅴ) located at Qianlianghu polder,Dongting Lake Area,a research was carried out to investigate the distribution and pollution of soil heavy metals (Cu,Zn,Mn,Pb,Cd,As and Hg) in five typical land-use patterns mentioned above.The results showed that in the soil layer of 0 to 25 cm,the highest contents of Cu,Zn,Pb,As and Hg all occurred in Ⅰ1,and the highest contents of Mn and Cd in Ⅰ4 and Ⅳ,respectively.In the soil layer of 25 to 50 cm,the highest contents of Cu,Mn and Hg occurred inⅠ1,Zn and As in Ⅳ,Pb and Cd in Ⅲ2 and Ⅰ3,respectively.Soils of pattern Ⅰ2,Ⅰ3,Ⅲ2 and Ⅳ were polluted with Cd,and the highest integrated pollution index occurred in Ⅳ and the lowest one occurred in Ⅴ.The interrelate regularities between heavy metals and soil physical and chemical properties were found through principal component analysis and double sieving stepwise regression analysis.

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王月容,卢 琦,周金星,周志翔. Distribution and pollution of soil heavy metals of different land-use patterns under converting polder back into wetlands at Dongting Lake Area[J]. Jorunal of Huazhong Agricultural University,2011,30(6):734-739.

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  • Received:March 28,2011
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