Archer FC, Hodgson IH. 1986. Total and extractable trace element contents of soils in England and Wales. Eur J Soil Sci. 38(3):421-431.
Bellett MF, Fitzpatrick EA, Cresser M. 1991. Long-term changes in the Cu, Pb and Zn content of forest soil organic horizons from north-east Scotland. Water, Air Soil Pollut. 59:179-191.
Chen NC, Chen HM. 1996. Soil-plant system of heavy metal pollution. Beijing, China: Science Press. p. 309-333 [in Chinese with English abstract].
Cheng SP. 2003. Heavy metal pollution in China: Origin, pattern and control. Environ Sci Pollut Res. 10(3):192-198 [in Chinese with English abstract]. Chinese standard GB/T 5009-11996 www.ccc-us.com.
Dai HL, Xu WH, Xiong ZT, Liu JZ. 2007. Effects of Zn stress on NPK uptake and Zn accumulation in four varieties of Chinese cabbage. J Southwest Agr Uni (Natural Sci). 28(3):410-413, 417 [in Chinese with English abstract].
Eriksson JE. 1990. The influence of pH, soil type and time on adsorption by plants of Cd added to the soil. Water, Air Soil Pollut. 48:317-335.
Guo GL, Zhou QX, Ma LQ. 2006. Availability and assessment of fixing additives for the in situ remediation of heavy metal contaminated soils: A review. Environ Monit Assess. 116:513-528 [in Chinese with English abstract].
He JH, Liu Y,Wang SY, Wei XG, Chen JJ, He WB, Du YQ. 2003. Studies on the background levels of heavy metals in major vegetables in Guangzhou vegetable garden soils. Ecol Environ. 12(3):269-272.
He QB, Singh BR. 1994. Crop uptake of cadmium from phosphorus fertilizers. I. Yield and cadmium content. Water, Air Soil Pollut. 74:251-265.
Hu HL, Yu SP, Abudukateer A. 2003. Study on distribution characterics of heavy metals in vegetables of An'ningqu district in Urumqi. J Xinjiang Uni (Sci and Eng). 20(3):290-293 [in Chinese with English abstract].
Jansson G, ö born I. 2000. Cadmium contents of Swedish carrots and the influence of soil factors. Acta Agr Scand, Section B: Soil Plant Sci. 50:49-56.
Kabala C, Szerszen L. 2002. Profile distribution of lead, zinc, and copper in Dystric Cambisols developed from granite and gneiss of the Sudetes Mountains in Poland. Water, Air Soil Pollut. 138:307-317.
Liao M, Huang CY, Xie ZM. 1999. Effect of pH on transport and transformation of cadmium in soil water system. Acta Sci Circum. 910:81-86 [in Chinese with English abstract].
Liu F, Wang HT, Wang DL. 2004. Spatial distribution of heavy metals from the Laizhou Bay Littoral wetland. Adv Mar Sci. 22(4):476-482 [in Chinese with English abstract].
Mathur BS, Rana NK, Lal S. 1991. Effect of rhizosphere application of lime on crop yield, soil properties, nutrient uptake and economics. J Indian Soc of Soil Sci. 39(3):523-529.
McLaughlin MJ,Maier NA, Rayment GE, Sparrow LA, Berg G, McKay A, Miham P, Merry RH, Smart MK. 1997. Cadmium in Australian potato tubers and soil. J Environ Qual. 26:1644-1649.
Ministry of Health of the People's Republic of China.1996. Method for analysis of hygienic standard of vegetables and fruits (GB/T 5009-1996). National Standards of the People's Republic of China [in Chinese].
Pueyo M, Sastre J, Hernandez E, vidal M, Lopez-Sanche JF, Rauret G. 2003. Prediction of trace element mobility in contaminated soils by sequential extraction. J Environ Qual. 32:2054-2066.
Rauret G, Lopez Sanchez JF, Sahuquillo A, Rubio R, Davidson CM, Ure AM, Quevauviller Ph. 1999. Improvement of the BCR three steps sequential extraction procedure prior to certification of new sediment and soil reference materials. J Environ Monit. 1:57-61.
Sterckeman T, Douay F, Baize D, Fourrier H, Proix N, Schvartz C. 2004. Factors affecting trace element concentrations in soils developed on recent marine deposits from northern France. Appl Geochem. 19:89-103.
The Editorial Committee of Yearbook of Chenggong County.2004. Yearbook of Chenggong County. Kunming, China: Yunnan Science and Technology Publishing Company. [in Chinese].
voegelin A, Barrnettler K, Kretzschmar R. 2003. Heavy metal release from contaminated soils: Comparison of column leaching and batch extraction results. J Environ Qual. 32:865-875.
Wang LF, Bai JG. 1994. Survey on vegetable contamination and its control. Agro-environ Prot. 13(2):84-88 [in Chinese with English abstract].
Wang XJ, Li BG, Tao S. 2005. The trace metal content of soil spatial analysis. Beijing, China: Science Press. [in Chinese with English abstract].
Wang YG, Zhang SR. 2001. Theory and practice on avoiding contamination of vegetable production. Beijing, China: Agricultural Publishing Company. p. 170-206 [in Chinese with English abstract].
Wei JF, Wu DQ, Peng JL. 1999. A study on heavy metal speciation in sediments from Guangzhou water body. Soil Environ Sci. 8(1):10-14 [in Chinese with English abstract].
Xia HP. 1997. Soil-plant system cadmium progress. Appl Environ Biol. 3(3):289-298 [in Chinese with English abstract].
Xie JZ, Liu SQ, Liu YZ, Gao RT. 2002. Effects of heavy metal in soil on quality of vegetables in Baoding City. Agro-Environ Prot. 21(4):325-327 [in Chinese with English abstract].
Zhang CL, Bai HY. 2001. valuing soil and vegetable polluted by heavy metals in the suburbs of Nanning. J Guangxi Agr Soil Sci. 20(3):186-200 [in Chinese with English abstract].
Zhang SX, Yi YL, Liu Y. 1999. Study on correlation between some metal element contents in soils of Caohekou area, Liaoling Province and three affecting factors. Acta Pedol Sin. 26(2):253-260 [in Chinese with English abstract].
Zhao QG, Zhou SL, Wu SH, Ren K. 2006. Cultivated land researches and strategies for its sustainable utilization and protection in China. Acta Pedol Sin. 43(4):662-1272 [in Chinese with English abstract].
Zhou LX, Wong JWC. 2002. Effects of dissolved organic matter from sludge and sludge compost on soil copper sorption. J Environ Qual. 30:878-883 [in Chinese with English abstract].
Zhou QX, Song YF. 2004. Contaminated soil remediation principles and methods. Beijing, China: Science Press [in Chinese with English abstract].
Zhou YM, Zhang JS. 1990. Surveys of heavy metals in soil and vegetables in Tianjing City. Agro-Environ Prot. 9(6):30-34 [in Chinese with English abstract].
Zu YQ. 2008. Trace elements in soils and vegetables in a periurban market garden in Yunnan Province (P.R. China): Evaluation and experimentation [PhD Thesis], Gembloux Agricultural University, Gembloux, Belgium.