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近年来,越来越多的科学实验证明,人体的健康与微量元素有关,因此,茶叶中所含的微量元素,越来越引起茶叶、医学、食品工作者的兴趣,硒就是这些微量元素的一种。硒在地球上的分布,差异非常大。世界各国的地区,包括中国各省区在内,无有例外,甚至在一个省的范围内,硒的分布差异也很大,因此,出现了富硒地区与缺硒地区。目前已知的缺硒国家有40余个,在中国,有22个省市的部分或大部分地区缺硒,随着调查研究工作的不断深入,富硒与缺硒地区将会更加清楚。
In recent years, more and more scientific experiments have proved that human health is related to trace elements. Therefore, the trace elements contained in tea more and more arouse the interest of tea, medicine and food workers. Selenium is the trace element A. Selenium in the distribution of the earth, the difference is very large. There are no exceptions in all the countries of the world, including the provinces and autonomous regions in China. Even within the limits of one province, the distribution of selenium is very different. Therefore, the selenium-rich areas and the selenium-deficient areas have emerged. At present, there are more than 40 selenium-deficient countries in China. In China, there are 22 provinces and municipalities that lack selenium in some or most of the regions. As investigation and research work continues to deepen, selenium and selenium-deficient areas will become clearer.