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Journal of Tea Science ›› 2020, Vol. 40 ›› Issue (4): 465-477.doi: 10.13305/j.cnki.jts.2020.04.003

• Research Paper • Previous Articles     Next Articles

Correlation Analysis Between Selenium Accumulation in Tea Leaves and Soil Factors in Selenium-rich Areas

ZHANG Haojie1, HAO Xinyuan1,*, ZHOU Chao1, WANG Lu1, WANG Xinchao1, YANG Yajun1, ZENG Jianming1,2,*, SUN Lengxue1, DAI Juhui3, XIANG Jun3, LUO Hong3, WANG Chaoyang4, ZHANG Xiangui5, LIU Tao6   

  1. 1. Tea Research Institute, Chinese Academy of Agricultural Science/National Center for Tea Improvement/Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture and Rural Affairs, Hangzhou 310008, China;
    2. Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610213, China;
    3. Enshi Academy of Agricultural Sciences, Enshi 445000, China;
    4. Ankang Institute of Agricultural Science, Ankang 726000, China;
    5. Ziyang Tea Research Institute, Ziyang 725300, China;
    6. Pingli County Tea and Gynostemma Pentaphyllum Development Center, Pingli 725500, China
  • Received:2019-10-12 Revised:2020-02-18 Online:2020-08-15 Published:2020-08-18

Abstract: Tea plant is a selenium-rich species and selenium-enriched tea products consumption is a safe and effective way to replenish selenium. Though the selenium content in fresh tea leaves can be affected by many environmental factors, selenium accumulation characteristics and main influencing factors of tea plants in selenium-rich areas were rarely reported. In this study, adult tea plants and rhizosphere soils from tea plantations in Enshi, Hubei and Ankang, Shaanxi were taken as research objects. Combined with various indicators such as total selenium content in soil and plant samples, the effect of selenium content in rhizosphere soil on the accumulation characteristics of selenium in tea plant was clarified. In addition, the importance of 9 important soil characteristics related factors such as soil pH and selenium content in selenium-rich areas were analyzed. Through grouping and overall correlation analysis of 186 representative soil samples and fresh tea samples, it was confirmed that there was a significant correlation between the total selenium contents in teas and soils (correlation coefficient r=0.59, P<0.01). Moreover, the total selenium content in tea was also significantly related to organic matter, hydrolysable nitrogen, zinc contents in soil and sulfur, zinc contents in shoots. The related factors of selenium content in soils and teas in Ankang and Enshi areas were also analyzed. A reliable mathematical model of selenium content in tea shoots on soil organic matter, sulfur, selenium and zinc contents was proposed. The goodness of fit was 0.512 6, reaching a highly significant level (P<0.01). The above results were of great significance to improve the production technology of selenium-enriched fresh tea leaves in selenium-enriched tea areas and further revealed the selenium accumulation mechanism in tea plants.

Key words: selenium-enriched tea, selenium content, accumulation characteristics, soil factors, correlation analysis

CLC Number: