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International Journal of Agricultural Research
  Year: 2006 | Volume: 1 | Issue: 1 | Page No.: 76-84
DOI: 10.3923/ijar.2006.76.84
 
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Methane Emission from the Wetland Rice Fields in Sagar Island, Ne Coast of Bay of Bengal, India
H. Biswas , S.K. Mukhopadhayay , T.K. De , S. Sen and T.K. Jana

Abstract:
Average rate of CH4 emission from the rice field mostly reclaimed from mangrove swamp in northwestern boundary of Sundarban (NE coast of Bay of Bengal, India) was found to be 0.98 μg m-2 s-1 with a maximum rate of 3.04 μg m-2 s-1 during waterlogged condition in September. Methane emission showed lower mean rate of 0.98 μg m-2 s-1 from the fertilized rice fields in the reclaimed area compared to that of virgin Indian mangrove forest (2.73 μg m-2 s-1), Indian upland rice fields ( 4.3 μg m-2 s-1) as well as South East Asian and temperate rice fields (3.0 μg m-2 s-1). Inhibition of methanogenesis by sulphate reducer in the mangrove sediment as well as in the rice fields reclaimed from virgin mangrove forest could cause lower emission rate compared to the upland rice fields where sulphate reduction could be limited due to less abundance of sulphate. Further decrease of emission rate in the rice fields reclaimed from mangrove forest compared to that of the mangrove sediment suggested that ammonia based fertilizer stimulated methane oxidation. Expansion of harvested area for rice agriculture by reclaiming mangrove swamp needs efficient management to control further increase in atmospheric methane.
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How to cite this article:

H. Biswas , S.K. Mukhopadhayay , T.K. De , S. Sen and T.K. Jana , 2006. Methane Emission from the Wetland Rice Fields in Sagar Island, Ne Coast of Bay of Bengal, India. International Journal of Agricultural Research, 1: 76-84.

DOI: 10.3923/ijar.2006.76.84

URL: https://scialert.net/abstract/?doi=ijar.2006.76.84

 
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