ORIGINAL RESEARCH
Characterization and Influencing Factors of Trace Elements, Tea Polyphenols, Caffeine, Free Amino Acids and Water Leachate Content in Tea
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College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
 
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College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China
 
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Key Laboratory of Karst Geological Resources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, China
 
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Field Scientific Observation and Research Station of Ministry of Education, Ministry of Education, Guizhou Karst Environmental Ecosystem, Guiyang, 550025, Guizhou Province, China
 
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Tongren Modern Agricultural Industry, Tongren 554300, China
 
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Guiding County Quality and Technical Supervision, Testing and Inspection Center, Qiannan 551300, China
 
 
Submission date: 2023-11-05
 
 
Final revision date: 2024-01-15
 
 
Acceptance date: 2024-01-25
 
 
Online publication date: 2024-04-04
 
 
Publication date: 2024-07-12
 
 
Corresponding author
Daigang Xu   

Tongren Modern Agricultural Industry, Tongren 554300, China
 
 
Yuli Zhang   

Guiding County Quality and Technical Supervision, Testing and Inspection Center, Qiannan 551300, China
 
 
Pol. J. Environ. Stud. 2024;33(5):5693-5702
 
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ABSTRACT
In this study, three major tea production areas (Guiding County, Duyun City, and Meitan County) in Guizhou Province were used as research objects to investigate the characteristics and influencing factors of the differences in the contents of trace elements and tea quality indexes in tea. The results showed that Meitan County had the highest content of trace elements in tea leaves of different origins, and there was no significant difference in the content of tea polyphenols, caffeine, free amino acids, and water leachate in tea leaves of different origins. The content of active ingredients (tea polyphenols, caffeine, free amino acids, and water leachate) was higher in young tea leaves. The results of random forest analysis showed that the importance of some trace elements in tea leaves on the content of tea polyphenols, caffeine, and free amino acids was significant at the levels of 0.05 and 0.01. This result suggests that the content of trace elements in tea leaves has an extremely important influence on the content of tea quality index components.
eISSN:2083-5906
ISSN:1230-1485
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