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Effects of Nitrogen Form and Root-zone pH on Nutrient Uptake and Concentrations of Organic Anions in Tea Plants (Camellia sinensis)

  • TANG Dandan ,
  • LIU Meiya ,
  • ZHANG Qunfeng ,
  • SHI Yuanzhi ,
  • MA Lifeng ,
  • RUAN Jianyun
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  • 1. Graduate School, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
    2. Key Laboratory of Tea Plant Biology and Resources Utilization (Ministry of Agriculture), Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China;

Received date: 2018-07-30

  Online published: 2019-06-13

Abstract

In this study, effects of different nitrogen forms and root-zone pH on nutrient uptake and concentrations of organic anions were preliminarily confirmed in hydroponically cultured Camellia sinensis cv. Longjing 43 seedlings. The results show that tea plants supplied with NH4+-N had higher concentrations of N, Fe and Cl- in the mature leaves and N, SO42- in the roots than those receiving nitrate (NO3--N). In contrast, tea plants receiving NH4+-N had lower concentrations of Ca, Mg, B, Mn, Zn in the whole plant, SO42- in the mature leaves and H2PO4- in the roots than those were cultured with NO3--N. Tea plants treated with NO3--N had higher concentrations of malate, oxalate, citrate in the mature leaves than those grown with NH4+-N or NH4+-N+NO3--N. Root-zone pH significantly affected nutrient contents in tea plants, especially when it interacted with nitrogen forms. The contents of K, Ca, Mg in roots and B, Mn, Zn in whole plant at pH 6.0 were higher than those at pH 4.0. Simultaneously the concentrations of malate, oxalate,citrate in the mature leaves and oxalate in the roots were generally increased at pH 6.0. Otherwise, the content of total N had a significantly negative correlation with the concentrations of Ca, Mg, citrate, oxalate. Moreover, the concentrations of Zn2+, Ca2+, Mg2+, Mn2+ were positively correlated with citrate and oxalate.

Cite this article

TANG Dandan , LIU Meiya , ZHANG Qunfeng , SHI Yuanzhi , MA Lifeng , RUAN Jianyun . Effects of Nitrogen Form and Root-zone pH on Nutrient Uptake and Concentrations of Organic Anions in Tea Plants (Camellia sinensis)[J]. Journal of Tea Science, 2019 , 39(2) : 159 -170 . DOI: 10.13305/j.cnki.jts.2019.02.005

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