Spraying silicon and/or cerium sols favorably mediated enhancement of Cd/Pb tolerance in Lettuce grown in combined Cd/Pb contaminated soil
A field experiment of foliar application of silicon sol,cerium sol and silicon-cerium composite sol of different concentrations on Lettuce in field mildly combined Cd/Pb contaminated soil,was conducted to study effects of the application on yield,quality,antioxidant enzymes (SOD,POD) activities and Cd/Pb absorption,and hence to determine optimum concentration of the silicon sols and cerium sols to be sprayed for relieving toxicity of Cd/Pb.Results showed that spraying silicon and cerium sols could promote growth of Lettuce,increase contents of vitamin C and soluble sugar,and reduce nitrite content,enhance activities of SOD and POD,and inhibit the absorption of Cd/Pb and decrease the content and accumulation of Cd/Pb in shoots and roots,and reduce the risk of Cd/Pb to human body through food chain,while spraying silicon-cerium composite sol of 0.50 g·kg-1siticon sols (SiO2) and 0.20 g·kg-1 cerium sols (CeO2) was the most significant in effect.
Lettuce silicon/cerium sol Cd/Pb accumulation antioxidant enzyme activity
Shuyi Li Shirong Zhang Xiaodong Ding Xinrong Liao Rongping Wang
Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences,No.808, Tianyuan Road, Guangzhou 510650, China
国际会议
2013 International Symposium on Environmental Science and Technology(2013环境科学与技术国际会议)
大连
英文
51-58
2013-06-04（万方平台首次上网日期，不代表论文的发表时间）