热带砖红壤Cd-PAHs复合污染对小白菜生物量和营养元素的影响

Effects of Cd-PAHs Combined Pollution on Biomass and Nutrient Elements of Pakchoi Cabbage in Tropical Latosol

采用均匀设计法,研究了Cd-PAHs复合污染对热带砖红壤栽培的小白菜生物量和营养元素的影响。结果表明:与对照相比,小白菜地上部干重随土壤Cd-PAHs复合处理浓度增加呈下降的趋势,而根部则表现不同的特征,根部干重不同处理间无明显规律,但与对照差异显著;小白菜中K、Ca和Mg3种大量营养元素受高浓度Cd影响较大,而受PAHs的影响不明显;小白菜中Fe、Mn、Cu和Zn4种微量营养元素受高浓度Cd影响较大,而受PA-Hs的影响不显著。本试验结果表明,小白菜中干物质量及营养元素主要受Cd影响较大。

Using uniform design experimentation, the effects of Cd-PAHs combined pollution on the biomass and nutrient elements of pakchoi cabbage cultivated in tropical latosol were studied. The results showed that the aboveground dry weight of the pakchoi cabbage decreased with the increase of the concentration of Cd-PAHs in the soil. However, their roots performed different characteristics, and there were no obvious regularities between different treatments of root dry weight but obviously different with CK; The effects of high concentrations of Cd on the macronutrients of Mg, Ca and K in the pakchoi cabbage were significant, while PAils was not; Similarly, the effects of high concentrations of Cd on the micronutrients of Fe, Mn, Cu and Zn in the cabbage were significant, while PAHs was not. These results indicated that the nu- trient elements of pakchoi cabbage were mainly affected by Cd.