摘要
通过对我国江西产茶区5个茶园土壤样品和茶树样品的采集,探讨了不同茶园茶树组织和茶园土壤氟含量。结果表明,氟主要集中在树叶上,尤其是落叶,落叶氟含量是嫩叶的2.5～4.0倍;土壤pH值影响了土壤和茶树样品的氟含量。使用2种方法(重复浸泡、持续浸泡)浸泡4种茶类(绿茶、黑茶、乌龙茶、砖茶)。结果发现茶叶中的氟以水溶性为主,水溶性氟含量达到了53%～80%;持续浸泡茶叶释放出的氟比重复浸泡茶叶释放出的氟含量要大,砖茶释放出极高的氟;为了防止氟斑牙的发生,人体饮用茶水,每日消耗的绿茶、乌龙茶、黑茶、砖茶茶水分别不能超过5.9,10,5.4,1.8L。
The contents of fluorine in tea tissues and tea garden soil were discussed in this paper by sampling the tea bushes and soil from five tea gardens located in Jiangxi province, China. The results showed fluorine accumulated mainly in leaves, especially in fallen leaves. The fluorine contents in old leaves were 2.5 ~ 4.0 times higher than that in young leaves. In addition, soil pH also affected fluorine contents in soils and plant tissues. Two methods （repeated and continuous） of infusing tea were employed to brew brands of tea leaves in four categories： Green tea, Oolong tea, Black tea and Brick tea. In general, fluorine contents in the infusions account for 53% to 80% of the total fluorine contents. The cumulative fluorine contents detected in tea liquor prepared by repeated infusion were slightly higher than those prepared by continuous infusions. Brick tea released extremely high fluorine content. In order to prevent development of fluorosis, the maximum consumption of Green tea, Oolong tea, Black tea and Brick tea should be 5.9, 10, 5.4, 1.8 L respectively.
出处
《环境科技》
2009年第3期26-29,共4页
Environmental Science and Technology
基金
南昌大学基金资助(z03370)
关键词
茶园土壤
氟
砖茶
浸泡
Tea garden soil
Fluorine
Brick tea
Infusion.
作者简介
徐飞高（1976-），男，江西东乡人，硕士，讲师，主要从事大气污染研究．
