PDF(Pubmed)
Abstract：
Potentially toxic metal(loid) assessment of tea and tea garden soil is a vital guarantee of tea safety and is very necessary. This study analyzed the distribution of seven potentially toxic metal(loid)s in different organs of the tea plants and soil at various depths in the Yangai tea farm of Guiyang City, Guizhou Province, China. Although soil potentially toxic metal(loid) in the study area is safe, there should be attention to the health risks of Cu, Ni, As, and Pb in the later stages of tea garden management. Soil As and Pb are primarily from anthropogenic sources, soil Zn is mainly affected by natural sources and human activities, and soil with other potentially toxic metal(loid) is predominantly from natural sources. Tea plants might be the enrichment of Zn and the exclusion or tolerance of As, Cu, Ni, and Pb. The tea plant has a strong ability for absorbing Cd and preferentially storing it in its roots, stems, and mature leaves. Although the Cd and other potentially toxic metal(loid)s content of tea in Guizhou Province is generally within the range of edible safety, with the increase of tea planting years, it is essential to take corresponding measures to prevent the potential health risks of Cd and other potentially toxic metal(loid)s in tea.
摘要：
茶叶和茶园土壤的潜在有毒金属（类）评估是茶叶安全的重要保证，是非常必要的。本研究分析了贵阳市仰赖茶场不同深度茶树不同器官和土壤中7种潜在有毒金属(类)的分布,贵州省,中国。尽管研究区域的土壤潜在有毒金属（loid）是安全的，应该注意铜的健康风险，Ni,As,和Pb在茶园管理的后期阶段。土壤砷和铅主要来自人为来源，土壤锌主要受自然来源和人类活动的影响，和土壤与其他潜在的有毒金属（loid）主要来自天然来源。茶树可能是锌的富集和砷的排斥或耐受性，Cu,Ni,和Pb。茶树对Cd有很强的吸收能力,并优先储存在其根部,茎,成熟的叶子虽然贵州省茶叶中Cd等潜在有毒金属(类)的含量普遍在食用安全范围内,随着茶叶种植年限的增加，有必要采取相应的措施，以防止茶叶中Cd和其他潜在有毒金属（类）的潜在健康风险。
