不同烤烟品种富集土壤重金属的效应

Accumulative characteristics of heavy metal for various types of flue cured tobacco

采用单因素随机区组设计,通过田间试验方法,测定了各个品种农艺性状及烤后不同部位烟叶中的铅、砷和镉的含量.结果表明:不同烤烟品种对重金属的富集作用存在显著差异;云烟87、云烟97、粤烟97和K326品种富集重金属的效应比较强;nc71、nc297、cz43、云烟99品种富集重金属的效应相对比较弱.脚叶落黄较早、大田生育期较短、旺长期农艺性状表现较差的烤烟品种,反而对重金属的富集作用较强;脚叶落黄较慢、大田生育期较长、旺长期农艺性状表现较好的烤烟品种,对重金属的富集作用相对较弱.

To understand accumulative differences of heavy metals among different varieties of flue cured tobacco,field experiment was conducted to measure plumbum（ Pb）,cadmiun（ Cd） and arsenic（ As） concentrations in tobacco leaves at bottom,middle and upper side of stem by single factor randomized block design. Agronomic characteristics were measured to compare potential impact of heavy metal on quality of flue cured tobacco. Results revealed that heavy metal enrichments differed among tobacco varieties. Heavy metal enrichments were relatively higher in Yunyan 87,Yunyan 97,Yueyan97 and K326 than NC71,NC297,CZ43 and Yunyan99. Varieties which had stronger heavy metal enrichment effect usually had predated foot leaf yellowing,shorter developmental period,and poor agronomic performance especially in vigorous growth period,however,delayed foot leaf yellowing,lengthened developmental period,and good term agronomic performance in vigorous growth period occurred in tobacco varieties which were low in heavy metal accumulation.