DA-6强化龙葵修复高镉污染土壤的作用

 【目的】研究二烷氨基乙醇羧酸酯（DA-6）对高镉污染土壤中龙葵生物量和镉提取量的影响，探讨DA-6提高龙葵修复镉污染效率的适宜浓度。【方法】采用盆栽试验方法，研究不同浓度的DA-6浸种和叶面喷施对龙葵生长和镉富集的影响。【结果】5、10、20、40 mg?L-1的DA-6浸种和叶面喷施使龙葵成熟期地上部分干重增加了8.69%—27.54%（P＜0.05），镉浓度提高了2.62%—6.75%，总镉提取量增加了10.12%—36.31%（P＜0.05）；DA-6处理降低了苗期和成熟期龙葵叶片中的丙二醛含量，增强了苗期叶片中过氧化物酶活性，降低了成熟期叶片中过氧化物酶活性。在苗期、花期和成熟期，DA-6处理的叶绿素值（SPAD）都有增加趋势。【结论】5、10、20和40 mg?L-1的DA-6通过浸种和叶面喷施能提高龙葵对镉修复的效率，尤以20 mg?L-1的作用最为显著。

Effect of DA-6 on Enhanced Remediation Efficiency of Solanum nigrum L.in Serious Cadmium Polluted Soil

【Objective】 The purpose of this experiment was to study the effect of different concentrations of diethyl aminoethyl hexanoate（DA-6） on the S. nigrum L. biomass and extraction from serious cadmium polluted soil, and discuss the best suitable one which could increase the remediation efficiency. 【Method】 A pot culture experiment was designed by different concentrations of DA-6 with soaking seed and foliage spraying. 【Result】 Results showed that at mature stage, 5, 10, 20 and 40 mg?L-1 DA-6 could increase the shoot dry weight by 8.69%-27.54% (P＜0.05), cadmium concentration by 2.62%-6.75% and total cadmium extraction by 10.12%-36.31% (P＜0.05). MDA got decreased at seedling and mature stages, while SPAD meter value increased; POD activity increased at seedling stage, but decreased at mature stage.【Conclusion】All treatments designed enhanced remediation efficiency, while 20 mg?L-1 DA-6 was the best one.