湖北恩施茶园土壤及茶叶硒元素调查研究

Investigation of the Selenium Element in Tea Plantation of Enshi District,Hubei Province

【目的】调查研究恩施茶区土壤及茶叶中硒含量,为湖北茶产业发展提供参考。【方法】采集了湖北恩施地区93个茶园的土壤和茶叶样品,检测了土壤pH值、土壤和茶叶中的硒含量。【结果】恩施地区的土壤全硒含量总体水平较高,变幅为0.13~43.50mg/kg,平均含量为1.52mg/kg,高于全国土壤元素平均值（0.1 mg/kg）,属富硒土壤;茶叶样品的硒含量变幅为0.040~1.03mg/kg,平均硒含量为0.16mg/kg,高于全国平均值（0.08~0.12mg/kg）。土壤中pH值范围在4.5~5.5时,土壤全硒含量与茶叶硒含量呈显著相关（r≥0.90）。【结论】恩施茶园大多为富硒茶园,茶园土壤pH值保持在4.0~5.5区间有利于茶树对土壤中硒的吸收。

【Objective】The objective of this study was to investigate the selenium element in tea plantation of Enshi district,Hubei province,and provide a reference for development of tea industry.【Method】Ninety three samples of soil and tea were collected in Enshi district,Hubei Province,and soil pH value,selenium content were analyzed.【Results】The Descriptive statistics indicated that the selenium content in soil was high in general,it ranged from 0.13 to 43.5mg/kg,and the average content was 1.52mg/kg,much higher than the average soil selenium content in China（0.1mg/kg）.The range of selenium content in tea samples were 0.04~1.03mg/kg,and the average content was 0.16mg/kg,higher than the average tea selenium content in China（0.08~0.12mg/kg）.As the soil pH of ranged from 4.0~5.5,the selenium content between the soil and the tea were significantly correlated（r≥0.90）.【Conclusion】The soil in the tea plantation almost belong to the selenium-rich soil in Enshi district,Hubei Province.It is atvantage for the absorption of selenium in the soil when the soil pH ranged from 4.0~5.5.