Zeng Wei-Ai, Li Fan, Zhou Hang, Qin Xiao-Li, Zou Zi-Jin, Tian Tao, Zeng Min, Liao Bo-Han
J Environ Biol. 2016 Jan;37(1):163-8.
In the present study, calcium carbonate (CaCO3) was applied to Cd-contaminated soil at rates of 0, 0.5 and 1.0 g kg(-1). The effect of CaCO3 on soil pH, organic matter, available Cd, exchangeable Cd and level of major nutrients in a tobacco field and on accumulation of various elements in tobacco plants was determined. The results showed that CaCO3 application significantly increased the pH level, available P and exchangeable Ca but decreased organic matter, available Cd, exchangeable Cd, available heavy metals (Fe, Mn, Zn and Cu) and available K in soil. Additionally, CaCO3 application substantially reduced Cd accumulation in tobacco roots, stems, upper leaves, middle leaves and lower leaves, with maximum decrease of 22.3%, 32.1%, 24.5%, 22.0% and 18.2%, respectively. There were large increase in total Ca and slight increases in total N and K but decrease to varying degrees in total Fe, Cu and Zn due to CaCO3 application. CaCO3 had little effect on total P and Mn levels in tobacco leaves.
在本研究中，碳酸钙（CaCO₃）以0、0.5和1.0 g kg⁻¹的施用量施用于镉污染土壤。测定了碳酸钙对烟田土壤pH值、有机质、有效镉、交换性镉和主要养分水平以及烟草植株中各种元素积累的影响。结果表明，施用碳酸钙显著提高了土壤pH值、有效磷和交换性钙，但降低了土壤中的有机质、有效镉、交换性镉、有效重金属（铁、锰、锌和铜）和速效钾。此外，施用碳酸钙显著降低了烟草根、茎、上部叶、中部叶和下部叶中的镉积累，最大降幅分别为22.3%、32.1%、24.5%、22.0%和18.2%。由于施用碳酸钙，烟草中总钙大幅增加，总氮和钾略有增加，但总铁、铜和锌不同程度下降。碳酸钙对烟叶中总磷和锰水平影响较小。
