Effects of Three Amendments on Selenium Availability of Highly Acidic and Se-rich Soil in Tea Garden and their Relative Mechanisms

XIE Shanni; ZONG Lianggang; ZHANG Qihui; DAI Rongbo; PAN Hanyue; YUAN Qiang

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Journal of Tea Science ›› 2017, Vol. 37 ›› Issue (3) : 299-307.

Effects of Three Amendments on Selenium Availability of Highly Acidic and Se-rich Soil in Tea Garden and their Relative Mechanisms

XIE Shanni, ZONG Lianggang^*, ZHANG Qihui, DAI Rongbo, PAN Hanyue, YUAN Qiang

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Abstract

A series of incubation experiment and field trail were carried out to study the effects and mechanisms of three amendments (straw charcoal, calcium-magnesium phosphate and earthworm liquid fertilizer) and their different applying modes on selenium (Se) availability of highly acidic and Se-rich soil in tea gardens. The results of incubation experiment showed that all treatments increased soil pH and the contents of available Se, but decreased the contents of exchangeable aluminum (Al) significantly. Se was transformed from organic bound form to soluble form, and Al was transformed from exchangeable form to organic complexed form by morphological analysis. The results of field trail showed that different applying modes effectively inhibited further soil acidification, enhanced the availability of Se and increased the Se content in tea leaves simultaneously. A combined application of straw charcoal, calcium-magnesium phosphate and earthworm liquid fertilizer showed the highest effects. The results of this research provide reference to develop Se-enriched tea in acidic and selenium-rich area.

Key words

acidification / active alumina / available selenium / soil amendment / tea soil

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XIE Shanni, ZONG Lianggang, ZHANG Qihui, DAI Rongbo, PAN Hanyue, YUAN Qiang. Effects of Three Amendments on Selenium Availability of Highly Acidic and Se-rich Soil in Tea Garden and their Relative Mechanisms[J]. Journal of Tea Science. 2017, 37(3): 299-307

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