LI Zhangwei. Absorption Law of Soil Cr and Mn in Fenghuang Dancong Tea Tree[J]. Bulletin of Soiland Water Conservation, 2018, 38(2): 71-74.
DOI:
LI Zhangwei. Absorption Law of Soil Cr and Mn in Fenghuang Dancong Tea Tree[J]. Bulletin of Soiland Water Conservation, 2018, 38(2): 71-74. DOI: 10.13961/j.cnki.stbctb.2018.02.012.
Absorption Law of Soil Cr and Mn in Fenghuang Dancong Tea Tree
[Objective] Investigating the absorption rule of Cr and Mn in soil by Fenghuang Dancong tea
to provide a scientific basis for the integrated control of Cr and Mn pollution in tea garden soil.[Methods] The samples of tea tree and soil were collected from Baoshan tea garden which located at Jiedong County
Jieyang City
Guangdong Province. The contents of Cr and Mn in tea leaves
tea stems and tea roots were determined by flame atomic absorption spectrophotometer(AAS)
and the acid exchangeable fractions of Cr and Mn in soil were extracted according to acetic acid extraction method and measured by AAS.[Results] The Cr contents distributed in tea trees were:tea root > tea stem > tea leaves; while the Mn content were tea leaves > tea stem > tea root. Correlation analyses showed that the content of Cr and Mn in tea leaves was highly positive with acid exchangeable fraction of Cr and Mn in soil
the same correlation was also found for the content of Cr in tea stems. Furthermore
the Cr content of tea leaves
tea stems and tea roots had high positive correlations with soil organic matter in soil
the Mn content of tea leaves had similar correlation with soil organic matter. The content of Mn in tea roots was highly negative correlated with the soil pH values.[Conclusion] It is possible to restrict the uptake of Cr and Mn in tea tree by adjusting the content of acid exchangeable fractions of Cr and Mn
organic matter and pH value in soil. The heavy metal contamination in tea leaves could be inhibited and the quality of tea leaves could be improved.
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