改良剂施用量对Cd污染土壤修复及烤烟Cd积累的影响

Effects of Combined Amendment on Soil Remediation and Cd Accumulation in Flue-cured Tobacco

摘要: 为了研究改良剂施用量对重金属Cd污染植烟土壤的修复效果,在湖北恩施“清江源”科技园区采取盆栽方法,人工模拟Cd污染,试验研究了不同改良剂用量对土壤中总Cd、交换态Cd及烤烟叶片中Cd含量的影响。结果表明,施用改良剂使植烟土壤pH值升高,阳离子交换量显著增加,交换性Cd含量显著降低。施用改良剂显著降低了烤烟中部叶Cd积累量,最大降幅达51.59%

Abstract: In order to study the dosage of conditioner on remediation results in Cd polluted soils, pot experiments were conducted in the Greenhouse of Qingjiangyuan Modern Tobacco Agricultural Science Park in Hubei, China.Dosage effects of conditioner on soil physical and chemical properties, soil total Cd, soil exchangeable Cd and tobacco leaves Cd content were studied. The results indicated that application of combined amendment significantly increased soil pH and CEC, and reduced exchangeable soil Cd. Application of combined amendment resulted in reducd contents of Cdin tobacco leaves,and the maximum reduction of Cd content was 51.59%.