关键词: 石灰, 铅污染, 菜地土壤, 修复效果

Abstract: Effects of the lime and cabbage application on the lead pollution soil ecosystem and its sustainable effects were studied in this paper to discuss the practicability of remediation of lead pollution soil by lime. A pot experiment was carried out in greenhouse to observe the yield. Five levels of lime additions (0, 1.5 mg/kg, 3.0 mg/kg, 4.5 mg/kg and 6.0 mg/kg soil) were added into the soil in the balance after 2 weeks of transplanting cabbage. Cabbage were continuous planted for three batches. Cabbage samples and soil samples were collected at the same time. The soil pH value, soil available lead content, microbial activity etc. indicators were determined. Cabbage of the biomass and the content of lead were also determined. Results showed that lime had no lasting effect on reducing the soil available lead content and cabbage lead content for the lead pollution vegetable soil. But lime could increase the microbial activity in the lead pollution soil. Especially after planted the cabbage, the activity of microbial was obviously increased. Microbe with strong ability of using carboxylic acids and amine carbon source could increase the content of soil available lead. Microbe with utilization ability for polymers, carbohydrates, amino acids and other types of carbon source could reduce the cabbage lead content. The results was expected to provide more reasonable theoretical support for the remediation heavy metal contaminated soil.

Key words: lime, lead pollution, vegetable plot soil, remediation effect