富硒区茶树鲜叶中硒累积与土壤因子的相关性分析

doi:10.13305/j.cnki.jts.2020.04.003

Abstract

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:

ZHANG Haojie, HAO Xinyuan, ZHOU Chao, WANG Lu, WANG Xinchao, YANG Yajun, ZENG Jianming, SUN Lengxue, DAI Juhui, XIANG Jun, LUO Hong, WANG Chaoyang, ZHANG Xiangui, LIU Tao. Correlation Analysis Between Selenium Accumulation in Tea Leaves and Soil Factors in Selenium-rich Areas[J]. Journal of Tea Science, 2020, 40(4): 465-477.

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

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