| 000 | 03755nab a22004937a 4500 | ||
|---|---|---|---|
| 999 |
_c30277 _d30277 |
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| 001 | G98350 | ||
| 003 | MX-TxCIM | ||
| 005 | 20231017234612.0 | ||
| 008 | 210712s2014 gw |||p|op||| 00| 0 eng d | ||
| 022 | _a1365-2486 (Online) | ||
| 022 | 0 | _a1354-1013 | |
| 024 | 8 | _ahttps://doi.org/10.1111/gcb.12347 | |
| 040 | _aMX-TxCIM | ||
| 041 | _aeng | ||
| 090 | _aCIS-7417 | ||
| 100 | 1 |
_aPadre, A.T. _93004 |
|
| 245 | 1 | 0 | _aAssessing the performance of the photo-acoustic infrared gas monitor for measuring CO2, N2O, and CH4 fluxes in two major cereal rotations |
| 260 |
_aUnited Kingdom : _bWiley, _c2014. |
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| 500 | _aPeer review | ||
| 500 | _aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=1354-1013 | ||
| 520 | _aRapid, precise, and globally comparable methods for monitoring greenhouse gas (GHG) fluxes are required for accurate GHG inventories from different cropping systems and management practices. Manual gas sampling followed by gas chromatography (GC) is widely used for measuring GHG fluxes in agricultural fields, but is laborious and time-consuming. The photo-acoustic infrared gas monitoring system (PAS) with on-line gas sampling is an attractive option, although it has not been evaluated for measuring GHG fluxes in cereals in general and rice in particular. We compared N2O, CO2, and CH4 fluxes measured by GC and PAS from agricultural fields under the rice–wheat and maize–wheat systems during the wheat (winter), and maize/rice (monsoon) seasons in Haryana, India. All the PAS readings were corrected for baseline drifts over time and PAS-CH4 (PCH4) readings in flooded rice were corrected for water vapor interferences. The PCH4 readings in ambient air increased by 2.3 ppm for every 1000 mg cm−3 increase in water vapor. The daily CO2, N2O, and CH4 fluxes measured by GC and PAS from the same chamber were not different in 93–98% of all the measurements made but the PAS exhibited greater precision for estimates of CO2 and N2O fluxes in wheat and maize, and lower precision for CH4 flux in rice, than GC. The seasonal GC- and PAS-N2O (PN2O) fluxes in wheat and maize were not different but the PAS-CO2 (PCO2) flux in wheat was 14–39% higher than that of GC. In flooded rice, the seasonal PCH4 and PN2O fluxes across N levels were higher than those of GC-CH4 and GC-N2O fluxes by about 2- and 4fold, respectively. The PAS (i) proved to be a suitable alternative to GC for N2O and CO2 flux measurements in wheat, and (ii) showed potential for obtaining accurate measurements of CH4 fluxes in flooded rice after making correction for changes in humidity. | ||
| 536 | _aSocioeconomics Program|Conservation Agriculture Program | ||
| 546 | _aText in English | ||
| 591 | _aJohn Wiley|CIMMYT Informa No. 1873 | ||
| 594 | _aINT3262|I1705444 | ||
| 595 | _aCSC | ||
| 650 | 1 | 7 |
_aAgriculture _gAGROVOC _2 _91007 |
| 650 | 1 | 0 |
_91031 _aCarbon dioxide _2AGROVOC |
| 650 | 1 | 0 | _agreenhouse gas emission |
| 650 | 1 | 0 | _aMethane |
| 650 | 1 | 0 | _aNitrous oxide |
| 650 | 1 | 0 | _aphoto-acoustic infrared gas analyzer |
| 700 | 3 |
_aRai, M. _91491 |
|
| 700 | 1 |
_aGathala, M.K. _gSustainable Intensification Program _gSustainable Agrifood Systems _8INT3262 _9911 |
|
| 700 | 1 |
_92060 _aSharma, S. |
|
| 700 | 1 |
_9781 _aKumar, V. _gSustainable Intensification Program _8I1705444 |
|
| 700 | 1 |
_92439 _aSharma, P.C. |
|
| 700 | 1 |
_92032 _aSharma, D.K. |
|
| 700 | 1 |
_93015 _aWassmann, R. |
|
| 700 | 1 |
_aLadha, J.K. _8001711567 _gFormerly Sustainable Agrifood Systems _9168 |
|
| 773 | 0 |
_tGlobal Change Biology _gv. 20, no. 1, p. 287-299 _dUnited Kingdom : Wiley, 2014. _w1365-2486 |
|
| 856 | 4 |
_uhttps://hdl.handle.net/20.500.12665/520 _yAccess only for CIMMYT Staff |
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| 942 |
_cJA _2ddc _n0 |
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