| 吴榕榕.梵净山西麓古茶树立地岩-土系统地球化学特征分析[J].地质与勘探,2020,56(5):955-968 |
| 梵净山西麓古茶树立地岩-土系统地球化学特征分析 |
| Geochemical characteristics of the rock-soil system at the ancient tea plantation site in the western piedmont of the Fanjing Mountains |
| 投稿时间：2019-12-16 修订日期：2020-08-05 |
| DOI：10.12134/j.dzykt.2020.05.006 |
| 中文关键词: 古茶树 岩石 土壤 地球化学特征 梵净山西麓 |
| 英文关键词: Ancient tea tree, rock, soil, geochemical characteristics, western piedmont of Fanjing Mountains |
| 基金项目:国家自然科学基金项目（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:2018 jd074）、贵州省教育厅青年科技人才成长项目（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）资助 |
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| 中文摘要: |
| 以梵净山西麓印江县紫薇镇古茶树立地剖面上的岩石和土壤为研究对象，使用ICP-MS和ICP-AES测定21种元素的含量，分析古茶树立地岩石-土壤系统的地球化学特征，以期为印江县古茶树保护及开发提供科学依据。结果表明：古茶树生长地岩石-土壤系统的主量、微量和重金属元素富集程度低（EF <3），受人为因素影响程度小，可为古茶树提供安全的生长环境。其中主量元素K和Al在岩石-土壤系统中含量丰富，Ca、Mg、Na元素含量较少，符合茶树喜钾嫌钙的生理特征；微量元素在岩石-土壤系统中含量变化均匀，但与地球化学丰度值和中国土壤背景值相比，其含量较少；重金属元素含量均低于无公害农产品种植业产地环境条件限定值。同时研究发现该岩土系统中Se元素含量丰富，可为当地发展富硒茶提供参考。 |
| 英文摘要: |
| This work aimed to provide a scientific basis for protection and development of ancient tea trees in Yinjiang County, Guizhou Province. Total contents of eight major elements (P, K, Ca, Fe, Mg, Al, S, Na), seven trace elements (Zn, Cu, Mn, Co, Mo, Se, V) and six heavy metal elements were measured by ICP-AES and ICP-MS in the rocks and soils from the site profiles in the Fanjing Mountains. where ancient tea trees grow. And the geochemical characteristics of the rock and soil system at this site were analyzed. Results show that the enrichment degree of major and trace elements in this rock-soil system is low, affected by human factors to a small extent. Among the elements, K and Al are rich in rock-soil system, Ca, Mg and Na are less, while the content of trace elements in the rock-soil system varies uniformly, but they are less compared with geochemical abundant values and the background values in soil of China. The content of heavy metal elements is lower than the limit value of environmental conditions in the place of production of pollution-free agricultural products. The main elements in the rock-soil system of the ancient tea plant growth site conform to the physiological characteristics of tea plant, which is potassium-like and calcium-magnesium-dislike, and can provide a safe growth environment for the ancient tea plant. For the trace elements, organic fertilizer should be properly used to supplement the relatively poor nutrients. At the same time, Se is abundant in this rock-soil system, which can provide a nutritional basis for the development of selenium-enriched tea for ancient tea plants. |
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