Hydrobiological Bulletin

, Volume 18, Issue 2, pp 103–108 | Cite as

Effect of leaf leachates ofPolyalthia longifolia on the growth and nitrogen fixation ofAzolla pinnata

  • Abhijit Sinhababu
  • Debiprasad Kushari


Leachates of leaves of different age ofPolyalthia longifolia showed different activities on growth ofAzolla.

The leachate of juvenile leaves showed the highest promotion as undiluted extract, in contract to the effects of leachates of mature and senescent leaves which had this effect when four times diluted.

The growth and nitrogen concent ofAzolla were highest in October at all treatments, particularly at the treatment with four times diluted leachates from senescent leaves.

The lowest growth rates ofAzolla due to different treatments were found in winter and in summer.


Nitrogen Growth Rate Nitrogen Fixation Lower Growth Lower Growth Rate 
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Copyright information

© Netherlands Hydrobiological Society 1984

Authors and Affiliations

  • Abhijit Sinhababu
    • 1
  • Debiprasad Kushari
    • 1
  1. 1.Ecology Laboratory, Dept. of BotanyUniv. of BurdwanBurdwanIndia

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