Yu Yao, Wan Yanan, Wang Qi, Li Huafen
College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, PR China.
College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, PR China.
Ecotoxicol Environ Saf. 2017 Apr;138:286-291. doi: 10.1016/j.ecoenv.2017.01.011. Epub 2017 Jan 11.
The smoke of tobacco is a major source of exposure to Cd in humans and therefore it is urgent to find a way to a method to reduce Cd accumulation in tobacco. A four-month tobacco pot experiment was conducted to investigate the effects of two base treatments (humic acid-based amendments) and two foliar treatments (Zn and Se) on Cd uptake by tobacco. The results showed that Cd in tobacco was mainly transferred into leaves, which could be significantly reduced by both applied amendments. The Cd contents in leaves were reduced by up to 67%. Foliar Zn alone significantly decreased Cd contents in leaves while foliar Se slightly increased them. When base and foliar treatments were combined, base treatments had dominant effects but those of foliar treatments were not distinct. The applied amendments did reduce Cd contents in all the parts of tobacco and the translocation into leaves and they were more effective than foliar Zn and Se.
烟草烟雾是人类接触镉的主要来源，因此迫切需要找到一种方法来减少烟草中的镉积累。进行了一项为期四个月的烟草盆栽试验，以研究两种基肥处理（基于腐殖酸的改良剂）和两种叶面处理（锌和硒）对烟草吸收镉的影响。结果表明，烟草中的镉主要转移到叶片中，两种施用的改良剂均可显著降低镉含量。叶片中的镉含量降低了67%。单独叶面施锌显著降低了叶片中的镉含量，而叶面施硒则略有增加。当基肥和叶面处理相结合时，基肥处理起主导作用，但叶面处理的效果不明显。施用的改良剂确实降低了烟草所有部位的镉含量以及向叶片中的转运，并且它们比叶面施锌和硒更有效。
