摘要
本研究在皖南部分茶园采集茶叶样和背景土壤样,分别测定其土壤有机质、pH、全氮、有效磷、速效钾和全硒量以及茶叶中硒含量,探究茶园土壤全硒量与茶叶硒的相关性,以及土壤有机质、pH和常规养分氮磷钾等对土壤全硒量与茶叶硒含量相关性(用硒转化系数表示)的影响。结果表明,供试茶园土壤平均硒含量较高(0.404 mg/kg),属于富硒土壤,茶叶中硒含量达到富硒茶标准。茶叶中硒含量主要受到土壤全硒量的影响,与土壤全硒量呈正相关,相关系数R2=0.7066(n=9)。土壤有机质、pH以及常规养分等对其相关性具有一定影响;总体上土壤全硒量与茶叶硒的相关性随着土壤有机质含量、pH和全氮量的变化呈现相同变化趋势,而随有效磷和速效钾含量变化规律不明显。本研究旨在为当地茶区生产优质富硒茶和开发利用富硒资源提供参考。
Tea leaves and soil samples were collected from select tea farms in Southern Anhui Province,the soil’s organic content,pH,nitrogen,available phosphorus,exchangeable potassium,and total selenium,as well as the selenium content in the tea were tested,respectively.How soil selenium relates to tea selenium,and the effect of organic matter,pH,and nutrients like nitrogen,phosphorus,and potassium on this relationship(expressed by selenium conversion coefficient)were investigated.The results showed that the average selenium content in the soil of the tested tea garden was higher(0.404 mg/kg),which belonged to Se-rich soil,and the selenium content in tea reached the standard of Serich tea.Selenium content in tea was mainly affected by total selenium content in soil,and was positively correlated with total selenium content in soil,with correlation coefficient R2=0.7066(n=9).Soil organic matter,pH and conventional nutrients had certain effects on the correlation.In general,the correlation between soil total selenium content and tea selenium content showed the same trend with the changes of soil organic matter content,pH and total nitrogen content,but the change with the content of available phosphorus and available potassium was not obvious.The study aim to back high-quality selenium-rich tea production in local tea areas with science and make use of local selenium resources.
作者
陈雅玲
范新会
CHEN Yaling;FAN Xinhui(Jiangsu Cultivated Land Quality and Agricultural Environment Protection Station,Nanjing 210036,China)
出处
《安徽农学通报》
2024年第19期65-69,共5页
Anhui Agricultural Science Bulletin
关键词
茶园
土壤全硒量
茶叶硒含量
相关性
影响因素
tea garden
total selenium in soil
selenium levels in tea
relevance
impact factors
