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cje ›› 2010, Vol. 29 ›› Issue (02): 382-386.

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Heavy metals in orchard and vegetable garden soils of Sanya City: Spatial distribution and contamination evaluation.

LI Fu-yan1,2;LI Xu-ming3|WU Peng-fei1,2|ZHAO Xiong1,2; ZHANG Dong-ming1,2|QI Zhi-ping2   

  1. 1Agriculture College, Hainan University, Danzhou 571737, Hainan, China|2Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Tropical Crops Germplasm Resources Utilization, Ministry of Agriculture, Danzhou 571737, Hainan, China|3Information Center of Department of Land Environment and Resources, Haikou 570203, China
  • Online:2010-02-10 Published:2010-02-10

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Abstract: Through field sampling and by using standard comparison and geoaccumulation index methods, the heavy metals contamination status of surface soils in the orchards and vegetable gardens of Sanya City was evaluated. In the test surface soils, the average concentrations of Hg, Cd, Cr, Pb and As were all lower than the Grade Ⅱ of China National Environment Quality Standard (GB 15618-1995), but those of Hg, Cd and Pb were higher than the background values of farmlands in Hainan Island, showing a slight pollution in certain areas. The variation coefficients of the metals were all > 1, suggesting their extremely uneven distribution in the soils. The spatial distribution patterns of the five heavy metals obt
ained by using Kriging algorithm approach displayed spatial heterogeneity of soil heavy metals contamination, which provided guidance for the sustainable development and utilization of orchards and vegetable gardens in Sanya City.

Key words: Beauveria bassiana, Chitinase, Solid state fermentation, Kinetic of enzyme reaction