喷施不同浓度硫酸锌对油菜吸收镉的影响

The Effect of Spraying Different Concentrations of Zinc Sulfate on Cadmium Absorption in Rapeseed

本研究采用盆栽实验,研究喷施不同浓度的硫酸锌对油菜吸收镉以及对油菜产量和土壤pH的影响。实验结果表明,相较于未喷施处理的植株,喷施一定浓度的硫酸锌溶液对降低植物的镉积累量具有显著作用。喷施为2.5%左右对植物镉积累量的降低最为明显,降幅为46%,考虑其他浓度降幅水平在33%~45%。喷施质量分数3%时植物镉积累量增高较明显,增幅为5%;喷施锌肥对油菜生物量的影响不大;喷施不同浓度的硫酸锌对土壤有效镉及pH的含量影响不大。植物根系与地上部生物量的增长趋势大致相同,喷施质量分数为1.5%左右的锌肥时油菜生物量较高,增幅为12.4%。

This study conducted a pot experiment to investigate the effects of spraying different concentrations of zinc sulfate on cadmium uptake by rapeseed,as well as on rapeseed yield and soil pH.The experimental results showed that compared to untreated plants,spraying a certain concentration of zinc sulfate solution had a significant effect on reducing cadmium accumulation in plants.Spraying at around 2.5%resulted in the most significant reduction in cadmium accumulation in plants,with a decrease of 46%.Considering other concentrations,the decrease level was between 33%and 45%.When spraying at a concentration of 3%,the accumulation of cadmium in plants increases significantly by 5%.Spraying zinc fertilizer has little effect on the biomass of rapeseed.Spraying different concentrations of zinc sulfate has little effect on the content of available cadmium and pH in soil.The growth trend of plant root system and aboveground biomass is roughly the same.When spraying zinc fertilizer with a concentration of about 1.5%,the biomass of rapeseed is higher,with an increase of 12.4%.