铅对3种烟草的毒害效应及其临界浓度

李荭荭; 吴敏兰; 贾洋洋; 王果

doi:10.19303/j.issn.1008-0384.2014.10.017

铅对3种烟草的毒害效应及其临界浓度

1. 福建农林大学资源与环境学院,福建福州,350002;
2. 漳州城市职业学院，福建漳州 363000

基金项目:

中国烟草总公司福建省分公司资助项目

详细信息

作者简介:
李荭荭 (1990-) , 女, 硕士研究生, 研究方向:土壤污染生态 (E-mail:879428026@qq.com);王果 (1957-) , 男, 教授, 博士生导师, 研究方向:土壤环境化学与污染生态 (E-mail:zyyhjwg572003@gmail.com)

中图分类号: X173;S572
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出版历程
- 收稿日期: 2013-10-18
- 刊出日期: 2014-10-17

Lead Toxicity on Three Varieties of Tobaccos

1. College of Resources and Environment,Fujian Agriculture and Forestry University;
2. Zhangzhou city vocational College

摘要

摘要: 通过盆栽试验, 研究铅对福建省3个主栽烟草品种 (翠碧1号、K326、云烟87) 的毒害效应及其临界值。结果表明, 在铅毒害时, 烟草表现为植株变矮、叶面积减小、根长变短。不同生长时期烟草对铅毒害的敏感性不同, 生长中期较敏感。不同部位对铅毒害的敏感性不同, 茎比其他部位敏感;下部叶比中上部叶敏感。翠碧1号、K326、云烟87不同部位的EC10值 (生物量降低10%时土壤中有效铅的浓度) 依次为:下部叶<根部<茎<中部叶<上部叶;根部<上部叶<茎<下部叶<中部叶;上部叶<下部叶<茎<根<中部叶。3种烟草品种中翠碧1号对铅毒害最敏感, 且中部叶为烟草食用的重要部位。因此, 采用翠碧1号中部叶的EC10值代表土壤铅对3种烟草毒害临界值, 为66.88mg·kg-1, 此值可以作为福建省植烟土壤铅的毒害临界值制定的依据。
- 烟草 /
- 铅 /
- 毒害效应 /
- EC10
Abstract: Toxic effect and threshold of lead (Pb) on three tobacco cultivars (i.e., Cuibi-1, K-326 and Yunyan-87) were studied using apot experiment with varying Pb additions.In general, the toxicity induced reductions on the height, leaf size and root length of the tobacco plants.However, the tobacco's sensitivity to Pb varied from cultivars to cultivars.In addition, the plants were most sensitive to the toxicity during the middle growth period, on the stems and the lower leaves.For instance, the EC10 (i.e., the available soil Pb content causing 10% reduction in tobacco mass) of different parts of Cuibi-1decreased in the order of:lower leaves<root<stem<middle leaves<upper leaves.For K-326, the order was:root<upper leaves<stem<lower leaves< middle leaves;and, for Yunyan-87, it was:upper leaves<lower leaves<stem<middle leaves.Since Cuibi-1was most sensitive to Pb of the three varieties, the EC10 for the middle leaves of Cuibi-1, 66.88 mg·kg-1, was suggested to be set as the Pb toxicity threshold for the three varieties, and for the tobacco-producing soils in Fujian in general as well.
- tobacco /
- lead /
- toxicity /
- EC10

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