NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.36 [2007] >
IJRSP Vol.36(6) [December 2007] >

Title: Seasonal emissions of methane and nitrous oxide from rice-wheat cropping system during 2002 and 2003
Authors: Gupta, Vandana
Sharma, Pratul
Pradhan, Vaishali
Bhat, S
Sharma, C
Johri, P
Kumar, Krishan
Gupta, Prabhat K
Keywords: Greenhouse gases (GHG)
Rice-wheat ecosystem
Water management
Issue Date: Dec-2007
Publisher: CSIR
Abstract: Methane (CH₄) and nitrous oxide (N₂O) are important atmospheric greenhouse gases (GHGs) and rice-wheat ecosystem has been identified as one of the important anthropogenic sources of GHGs in agriculture sector. The water management in a given rice-wheat ecosystem plays a crucial role in its GHGs emission. It has been observed that the water regime in irrigated rice fields with sandy loam soils becomes intermittently flooded, due to high water percolation, which has a direct bearing on CH₄ emissions. Wheat crop on the other hand does not need water flooding; hence N₂O becomes important due to oxic environment. Intermittently flooded water regimes were simulated at NPL experimental fields to estimate the seasonal emissions of CH₄ and N₂O from rice-wheat cropping system during 2002-2003. The CH₄ and N₂O flux from wheat ecosystem was in the range of – 0.36-1.06 mg m⁻² h⁻¹ and – 0.10-1.22 mg m⁻² h⁻¹, respectively. The CH₄ and N₂O emission from rice cultivation was in the range of – 0.65-1.25 mg m⁻² h⁻¹ and – 0.32-0.43 mg m⁻² h⁻¹, respectively, from irrigated intermittently flooded (IR-IF) multiple aeration (MA) ecosystem. The CH₄ and N₂O seasonal integrated flux (Esif) from wheat cultivation are 1.02 + 0.26 and 0.50 + 0.12 gm⁻², respectively, and from rice cultivation for IR-IF-MA ecosystem 0.52 + 0.36 and 0.28 + 0.20 gm⁻², respectively. The CH₄ emissions were significantly low from IR-IF-MA rice ecosystem and were surprisingly higher comparatively, from the wheat crop. It may be because of frequent rainfall events and high soil temperature in wheat cropping season.
Page(s): 582-585
ISSN: 0367-8393
Source:IJRSP Vol.36(6) [December 2007]

Files in This Item:

File Description SizeFormat
IJRSP 36(6) 582-585.pdf121.65 kBAdobe PDFView/Open
 Current Page Visits: 927 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2015 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 166196 since 01-Sep-2015  Last updated on 28-Jun-2016Webmaster: