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| 贵州湄潭茶区土壤-茶叶系统中微量元素富集规律与产地溯源 | |
| 引用本文： | 张棚,杨雪妍,洪晶,张娅俐,田晓静,张福梅,曹竑,陈士恩,马忠仁,丁功涛,宋礼,罗丽.贵州湄潭茶区土壤-茶叶系统中微量元素富集规律与产地溯源[J].浙江农业学报,2022,34(2):378. |
| 作者姓名： | 张棚 杨雪妍 洪晶 张娅俐 田晓静 张福梅 曹竑 陈士恩 马忠仁 丁功涛 宋礼 罗丽 |
| 作者单位： | 1.西北民族大学 生命科学与工程学院, 甘肃 兰州 7301242.西北民族大学 生物医学研究中心,中国-马来西亚国家联合实验室,甘肃 兰州 7300303.甘南牦牛乳研究院,甘肃 合作 747000 |
| 基金项目： | 西北民族大学武陵山片区精准扶贫科研项目(31920180001);西北民族大学中央高校基本科研业务费(31920210006);甘南牦牛乳研究院横向课题(XBMU-2020BC-30) |
| 摘 要： | 为了解贵州湄潭茶区土壤-茶叶系统中微量元素的迁移与特征规律,采集湄潭县洗马镇、鱼泉镇等12个村镇的茶叶与土壤,利用电感耦合等离子体发射光谱仪(ICP-OES)测定茶叶、土壤中11种微量元素(Ce、Co、Fe、La、Mg、Mn、Na、Ni、Pr、Se、Zn)的含量。结果表明:上述地区土壤Ni、Zn等重金属的平均含量低于国家限定标准,所测重金属中单项污染指数(Pi)≤1,地累计指数(Igeo)≤0,表明这些地区土壤均未受到污染,且湄潭茶区达到富硒土壤要求;但Co、Pr、Ni的污染指数接近污染值界限,建议茶区减少含有Co、Pr、Ni 3种元素的有毒有害物质排放,以便解决未来元素污染的隐患,保持土壤清洁状态;对照国家标准,湄潭茶叶重金属含量未超标,且湄潭部分茶区符合富硒茶叶要求;茶叶-土壤-pH值系统中,茶叶与土壤上下层大部分元素含量有正或负相关关系,上下层土壤pH值与其部分元素含量也有正或负相关关系,茶树中Mn元素富集能力较强,Mn元素的吸收与Mg、Na、Ni、Pr、Co、Se元素的吸收具有一定拮抗作用;采用主成分分析与典则判别分析探讨湄潭茶区土壤上下层以及茶叶特征规律,发现主成分分析和典则判别分析均可将12个茶区的茶叶、土壤各自区分,其不仅实现了不同茶区土壤的区分,而且相同茶区土壤上下层也得到区分,且典则判别分析结果图中数据点的聚集性更好,以上结果证实,湄潭茶区不同地域茶叶与土壤微量元素含量特征存在差异性,特征规律明显。系统地对湄潭茶区土壤-茶叶体系中微量元素的特征规律进行探究,可为贵州省湄潭茶区土壤-茶叶体系中微量元素富集、迁移规律,以及产地溯源提供依据。 |
| 关 键 词： | 湄潭 土壤 茶叶 微量元素 富集 污染指数 |
| 收稿时间： | 2021-06-04 |
Enrichment of trace elements in soil-tea system in Meitan tea area of Guizhou and origin traceability |
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| ZHANG Peng,YANG Xueyan,HONG Jing,ZHANG Yali,TIAN Xiaojing,ZHANG Fumei,CAO Hong,CHEN Shi&#x,en,MA Zhongren,DING Gongtao,SONG Li,LUO Li.Enrichment of trace elements in soil-tea system in Meitan tea area of Guizhou and origin traceability[J].Acta Agriculturae Zhejiangensis,2022,34(2):378. | |
| Authors: | ZHANG Peng YANG Xueyan HONG Jing ZHANG Yali TIAN Xiaojing ZHANG Fumei CAO Hong CHEN Shi&#x en MA Zhongren DING Gongtao SONG Li LUO Li |
| Institution: | 1. College of Life Science and Engineering, Northwestern Minzu University, Lanzhou 730124, China 2. China-Malaysia National Joint Laboratory, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China 3. Gannan Research Institute of Yak Milk, Hezuo 747000, Gansu, China |
| Abstract: | To study the migration and characteristics of trace elements in soil-tea system in Meitan tea area, Guizhou Province, tea leaves and soil from 12 villages including Xima Town and Yuquan Town in Meitan County were collected and contents of 11 trace elements including Ce, Co, Fe, La, Mg, Mn, Na, Ni, Pr, Se and Zn were detected by inductively coupled plasma optical emission spectrometer (ICP-OES). The results showed that average contents of Ni, Zn and other heavy metals in the soil were lower than the national limit standard, and the single pollution index (Pi) ≤1 and the index of geo-accumulation (Igeo) ≤0, indicated that Meitan tea area soil were not polluted. In addition, Meitan tea area met the requirements of selenium-rich soil, but the pollution indexes of Co, Pr and Ni were close to the pollution limit. Therefore, it was suggested that the tea area should reduce the emission of toxic and harmful substances containing Co, Pr and Ni, so as to solve the hidden danger of element pollution in the future and keep the soil clean. At the same time, according to the national standard, content of heavy metals in Meitan tea did not exceed the standard, and some tea areas in Meitan met the requirements of selenium-rich tea. It could also be seen that in the tea-soil-pH system, tea had positive or negative correlations with most elements in the upper and lower layers of soil, and pH value of the upper and lower layers of the soil was also positively or negatively correlated with contents of some elements in the soil. Enrichment ability of Mn element in the tea tree was strong, and the absorption of Mn element had a certain antagonistic effect on the absorption of Mg, Na, Ni, Pr, Co and Se. In this study, principal component analysis and canonical discriminant analysis were used to study the characteristics of the upper and lower layers of soil and tea in Meitan tea area. It was found that both principal component analysis and canonical discriminant analysis could distinguish the tea leaves and soil in the 12 tea areas, which not only realized the differentiation of soil in different tea areas, but also distinguished the upper and lower layers of the soil in the same tea area, and the data points in the canonical discriminant analysis showed better aggregation. The above results indicated that there were differences in the contents of trace elements in tea leaves and soil in different regions of Meitan tea area, with obvious characteristics. In this study, the characteristics of trace elements in the soil-tea system in Meitan tea area were systematically explored to provide a basis for the enrichment, migration and origin traceability of trace elements in the soil-tea system in Meitan tea area in Guizhou Province. |
| Keywords: | Meitan County soil tea trace elements enrichment pollution index |
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