模拟酸雨强度与小白菜体内Zn含量的正相关性研究

Positive correlation between simulated acid rain intensity and Zn content of Pakchoi

通过盆栽试验,模拟酸雨条件下重金属Zn对小白菜的生长部位和生理指标的影响。结果发现,随模拟酸雨强度的增加,小白菜根部对土壤中有效态Zn吸收量有所增加,使得小白菜根、茎、叶部分积累的Zn含量均有增加趋势,且酸度越高,Zn积累量相应越大,小白菜根、茎部分积累的Zn含量直接受酸雨pH值的显著性影响。本研究结果表明,酸雨增加了作物尤其是根部吸收重金属Zn的风险,将进一步加重Zn污染地区的农产品安全问题。

A pot experiment was established to evaluate the effects of Zn on growth sites and physiological indices of pakchoi under simulated acid rain. It was found that an increasing trend of Zn content accumulated in roots, stems and leaves of pakchoi was due to increasing amount of available Zn absorbed by roots of the pakchoi from soils with strength of simulated acid rain increasing. Furthermore, the higher acidity, the more amounts of Zn accumulated. The contributions of Zn accumulated in the roots and stems of pakchoi were influenced by pH value significantly. The results indicated that acid rain increased the risk of heavy metal Zn absorbed in the crops, especially the roots, which would be more serious for the safety of agricultural products in this polluted area.