Abstract
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.
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Subudhi, B.P.R., Singh, P.K. Effect of macronutrients and pH on the growth, nitrogen fixation and soluble sugar content of water fernAzolla pinnata . Biol Plant 21, 66–70 (1979). https://doi.org/10.1007/BF02888721
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DOI: https://doi.org/10.1007/BF02888721