Distribution and Enrichment of Pb in Brassica Chinensis Grown on the Vegetable Soil from a Suburb of Nanjing, Jiangsu Province
Pb enrichment in Brassica Chinensis was studied in a pot experiment using an artificially polluted vegetable soil collected from a suburb of Nanjing, Jiangsu Province. The results showed that Pb aded at low levels promoted the cabbage growth in term of the biomass, while with the increase of the Pb level, the growth of Brassica Chinensis turned to be inhibited and decreased in hiomass. Pb concentration in Brassica Chinensis increased with the increase of Ph level added into the soil. The relationship between Pb in Brassica Chinensis and total or bioavailable Pb in soil could be described by exponential function (P<0.001). The Pb enrichment coefficients in the shoot and the root were 0.010 -0.579 and 0.437 - 5.167, respectively. The critical concentration of Pb in the vegetable soil was 201.54 mg kg, which was obtained via the liner regression between Pb contents in the edible part of Brassica Chinensis and Pb levels added into the soil.
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万方数据
维普
