小白菜富集Cd能力及对土壤Cd污染修复的能力研究

采用盆栽土培试验方法,以小白菜为供试材料,研究了其吸收积累Cd能力的品种差异,探讨了小白菜对土壤Cd的净化能力。结果表明,所选4个品种中,植株Cd含量随Cd浓度增大而显著增加,吸Cd量也迅速增加。小白菜“翠宝”有相对较强的富Cd能力,呈现出相对较强的耐受性。相关分析显示,小白菜总吸Cd量与DTPA-Cd呈显著正相关。土壤Cd分析显示,种植小白菜可以减缓土壤Cd的固定,“翠宝”和其余供试品种间差异达到了显著水平,其对土壤Cd的净化率最高。

Uptake and Accumulation of Cd by Pakchoi and Its Phytoremediation in Contaminated Soil

Pot cultivation experiment was carried out to study genotypic differences of absorption and accumulation of Cd by pakchoi.The results showed that the vegetable plants had capability in accumulation of the metal in polluted soil.The results were summarized as follows: in four chosen varieties tested in the study,Cd content in the plants increased greatly with enhanced Cd treated levels;while Cd uptake was also increasing promptly.Cd was absorbed well by Pakchoi C,and the pakchoi C showed relatively fair tolerance against Cd stress.Relevance analysis showed that total Cd uptake was significantly positively correlative with DTPA-Cd.It has been indicated that the plants can decline the content of Cd in soil.However,there was a highly significant difference among pakchoi C and other plants,at the same time,it meant that removal rate of Cd by this plant was in the highest.