title: Effect of calcium carbonate on cadmium and nutrients uptake in tobacco (Nicotiana tabacum L.) planted on contaminated soil.
abstract: 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.
authors.forename: Wei-Ai
authors.initials: WA
authors.lastname: Zeng
authors.forename: Fan
authors.initials: F
authors.lastname: Li
authors.forename: Hang
authors.initials: H
authors.lastname: Zhou
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Qin
authors.forename: Zi-Jin
authors.initials: ZJ
authors.lastname: Zou
authors.forename: Tao
authors.initials: T
authors.lastname: Tian
authors.forename: Min
authors.initials: M
authors.lastname: Zeng
authors.forename: Bo-Han
authors.initials: BH
authors.lastname: Liao
mesh_terms: D001673:Biodegradation, Environmental; D002104:Cadmium / Q000378:metabolism*; D002118:Calcium / Q000737:chemistry / Q000378:metabolism; D002119:Calcium Carbonate / Q000494:pharmacology*; D008274:Magnesium / Q000737:chemistry / Q000378:metabolism; D010758:Phosphorus / Q000737:chemistry / Q000378:metabolism; D011188:Potassium / Q000737:chemistry / Q000378:metabolism; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000378:metabolism*; D014026:Nicotiana / Q000187:drug effects / Q000378:metabolism*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium; D010758:Phosphorus; D002119:Calcium Carbonate; D008274:Magnesium; D011188:Potassium; D002118:Calcium