摘要
为了解梵净山翠峰茶产地矿质元素的迁移富集特征,进而为翠峰茶地理标志保护提供参考依据,本文选取梵净山翠峰茶产区3个典型剖面,采集茶园的基岩和土壤样品共22份,对样品常量、微量元素含量进行测定,分析其地球化学特征。结果表明:梵净山翠峰茶园基岩中Se、As相对富集,Na相对缺失;其中团龙、大水溪村茶园基岩Al、K富集,湄坨村茶园基岩Ca、Mg富集。茶园土壤中富含与茶树生长相关的常、微量元素,除湄坨村茶园土壤中的As、Cd与Hg含量相对较高,其余重金属元素在无公害食品茶叶产地环境条件的限定值内。对比发现,元素在不同剖面垂向分布呈"L"型或反"L"型,与基岩类型、元素地球化学性质、成土环境、外部元素输入等因素有关。在岩-土系统中,团龙、湄坨村茶园大部分元素以淀积为主,在土壤中相对富集,其中湄坨村茶园除Ca、Mg表现为迁移淋失,其余元素呈现为从上往下迁移富集强度先增后减,在中部土壤的相对富集程度最大。大水溪村茶园大部分元素以迁移淋失为主,在土壤中相对缺失。
The purpose of this work was to understand the migration and enrichment characteristics of mineral elements in the Cuifeng tea production area,Fanjingshan,Guizhou Province,thus providing a reference for the protection of geographical indicators of the Cuifeng tea.To this end,22 samples of bedrock and soil were collected from three typical tea gardens in the study area.The contents of main and trace elements were measured and their geochemical characteristics were analyzed.The results show that in the study area,Se and As are relatively enriched,Na is relatively lacking,Al and K are enriched in the bedrock of Tuanlong and Da Shuixi,and Ca and Mg are enriched in Meituo.The soil is rich in the main and trace elements related to the growth of tea trees.Except As,Cd and Hg in Meituo’s soil,the other heavy metal elements are within the limits of environmental conditions of pollution-free food and the tea production area.The vertical distribution of elements in different sections is L-shaped or anti-L-shaped,which is related to bedrock type,element geochemical properties,soil forming environment and external element input.In the rock-soil system,most of the elements in the Tuanlong and Meituo tea gardens are dominated by deposition and relatively enriched in the soil.Except Ca and Mg,the other elements in the Meituo tea garden move from top to bottom.The enrichment intensity first increases and then decreases,and the relative enrichment degree is the largest in the middle part of soil.Most of the elements in the Dashuixi tea garden have been transported or leached,thus relatively lacking in soil.
作者
刘思佳
吴榕榕
刘岚君
魏晓
王衡
文雪峰
LIU Sijia;WU Rongrong;LIU Lanjun;WEI Xiao;WANG Heng;WEN Xuefeng(Agricultural College of Guizhou University,Guiyang,Guizhou 550025;Public Administration College of Guizhou University of Finance and Economics,Guiyang,Guizhou 550025)
出处
《地质与勘探》
CAS
CSCD
北大核心
2020年第5期942-954,共13页
Geology and Exploration
基金
国家自然科学基金项目(编号:41563011)
贵州省科学技术基金(编号:黔科合J字[2014]2072号,黔科合J字[2015]2029号)
贵州省教育厅高等学校人文社会科学研究基地项目(编号:2018jd074)
贵州省教育厅青年科技人才成长项目(编号:黔教合KY字[2016]177)
商务部联合研究基金重点项目:“两江上游”精准扶贫脱贫研究(编号:2016SWBZD19)联合资助。
关键词
翠峰茶
岩-土系统
矿质元素
迁移富集
梵净山
Cuifeng tea
rock-soil system
mineral element
migration and enrichment
Fanjingshan
