不同钾肥对几种烟草吸收累积土壤镉的影响  

Effect of potassium fertilizers on the uptake of soil cadmium by flue-cured tobaccos

作　　者：晏哲[1] 高志强 罗真华 胡鑫[1] 彭亮[1] 曾清如[1] 

机构地区：[1]湖南农业大学资源环境学院,长沙410128 [2]湖南省株洲市烟草公司,株洲412000

出　　处：《环境化学》2016年第9期1913-1920,共8页Environmental Chemistry

基　　金："株烟草产地重金属污染风险评估定量模型及控制技术的研究与示范"(SHZH(湘F)2013-006)资助~~

摘　　要：采用盆栽试验,研究了3种钾肥对4种烟草吸收土壤重金属镉的影响.烟草云烟87、云烟97、K326和湘3号生长在株洲茶陵镉污染1.0 mg·kg^(-1)以下的酸性土壤上,通过追肥施入3种钾肥(硫酸钾、硅酸钾、磷酸氢二钾),分别测定烟草上、中、下部位烟叶中重金属的含量,探讨3种钾肥对污染土壤pH的影响及烟草吸收土壤重金属镉的差异性.结果表明,K326对镉的富集能力最强,云烟87最弱;硅酸钾对降低烟草吸收镉的效果最好,降低率可达20%—40%;且3种钾肥对土壤pH和镉化学形态的影响均呈显著性水平.Pot experiments were conducted to study the KESiO4 and K2HPO4） on the absorption of cadmium by K326 and Xiang3 were grown in acidic soils in Zhuzhou effects of 3 potassium fertilizers （ K2 S04, 4 tobacco plants.Tobacco Yun87, Yun97, Chaling with cadmium concentration below 1.0 mg.kg-1 with.Through 3 fertilizers application, we analysed heavy metal contents in the upper, middle and lower leaves of the tobacco to explore the effects of the fertilizers on the pH of the contaminated soil and absorption of soil cadmium by tobacco. The results showed that the accumulation of K326 was the strongest for cadmium, and Yun87 was the weakest, K2SiO4 showed best reduction of cadmium absorbed by tobacco, by 20% to 40%. All the three fertilizers had significant effects on soil pH and chemical speciation of cadmium.

关 键 词：钾肥 烟草 镉 抗性 

分 类 号：X53[环境科学与工程—环境工程]