Pedosphere 9(4): 369--374, 1999
ISSN 1002-0160/CN 32-1315/P
©1999 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Grey disorder in field flue-cured tobacco
ZHANG Xin1, ZHAO Qi-Bo2, YU Hui-Mei2 and CAO Zhi-Hong1
1 Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 (China)
2 Jiangsu Provincial Tobacco Company, Nanjing 210O29 (China)
ABSTRACT
      A field study wag carried out on the grey disorder in flue-cured tobacco (Nicotiana ta6acum L.) leaves. The results showed that low Eh and high available Fe content in the soils were responsible for the grey tobacco and dead roots. Grey disorder leaves produced low quality lamina, which was low in N, nicotine, reduced sugar and K contents. In this study, soil available Mn and leaf Mn contents were in a relatively low level and should not be an important factor in the occurrence of grey disorder in flue-cured tobacco.
Key Words:  flue-cured tobacco, grey disorder, iron, manganese, toxicity
Citation: Zhang, X., Zhao, Q. B., Yu, H. M. and Cao, Z. H. 1999. Grey disorder in field flue-cured tobacco. Pedosphere. 9(4): 369-374.
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