Biologia Plantarum

, Volume 21, Issue 1, pp 66–70 | Cite as

Effect of macronutrients and pH on the growth, nitrogen fixation and soluble sugar content of water fernAzolla pinnata

  • B. P. R. Subudhi
  • P. K. Singh
Original Papers


Deficiency in Ca and P in mineral medium reduced the growth and nitrogen content ofAzolla pinnata but increased the content of soluble sugars in the plant; the deficiency in K and Mg was less effective in retarding the growth. The pH of the medium from 5 to 8 encouraged the growth and nitrogen fixation, whereas acidic pH of 4 as well as alkaline pH of 9 inhibited the growth and nitrogen fixation.


Chlorophyll Nitrogen Fixation Soluble Sugar Acetylene Reduction Soluble Sugar Content 
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Copyright information

© Academia 1979

Authors and Affiliations

  • B. P. R. Subudhi
  • P. K. Singh
    • 1
  1. 1.Central Rice Research InstituteOrissaIndia

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