DISTRIBUTION OF DIFFERENT FORMS OF NITROGEN IN BRACKISHWATER FISH-POND SOILS OF WEST BENGAL


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Authors

  • G N Chattopadhyay Centred Inland Fisheries Research Institute, Barrackpore, West Bengal
  • L N Mandal B. C. Krishi Viswa Vidyalaya, Mohanpur, West Bengal.

Abstract

Total nitrogen content of the soils from sixteen brackishwater ponds ranged
from 220 to 420 ppm with an aveirage vclue of 330 ppm which was much less
than what is generally found in freshwater pond soils. Available nitrogen level
was also rather low ranging from 50.4 to 110.6 ppm with an averags value of
89.9 ppm. NH4+form of nitrogen occurred in higher amount than the 'NO3- form
with average values of 16.8 and 8.9 ppm respectively. C:'N ratios of the soils
ranged from 10.0 to 14.1 with an averagfc valu; of 12.5. The results emphas'zed
the need of application of nitrogen through fertilizers or manures for increasing
their productivity.

Author Biographies

  • G N Chattopadhyay, Centred Inland Fisheries Research Institute, Barrackpore, West Bengal
    Centred Inland Fisheries Research Institute, Barrackpore, West Bengal
  • L N Mandal, B. C. Krishi Viswa Vidyalaya, Mohanpur, West Bengal.
    B. C. Krishi Viswa Vidyalaya, Mohanpur, West Bengal.

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How to Cite

Chattopadhyay, G. N., & Mandal, L. N. (2011). DISTRIBUTION OF DIFFERENT FORMS OF NITROGEN IN BRACKISHWATER FISH-POND SOILS OF WEST BENGAL. Indian Journal of Fisheries, 27(1 & 2), 140-144. https://epubs.icar.org.in/index.php/IJF/article/view/11988