the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Seasonality of ecosystem respiration in a double-cropping paddy field in Bangladesh
Abstract. Ecosystem respiration (RE) from cultivated ecosystems is important for understanding the role of these ecosystems in the global carbon balance. To evaluate carbon dynamics in a double-rice cropping paddy field, we conducted long-term measurements at Mymensingh, Bangladesh in 2007 using a tower-based eddy covariance technique. The study objectives were to investigate the diurnal and seasonal variations in RE and to develop and evaluate empirical models for predicting variations in RE using environmental parameters. We found that the diurnal pattern of RE was driven by soil temperature (Ts) whereas the seasonal variation in RE was controlled primarily by Ts and soil water content (SWC). Under high biomass conditions, Ts plays a dominant role in the magnitude of CO2 release. Both the amount and magnitude of RE variation were larger in the "Boro" dry-season rice growing period from late winter to mid-summer than in the "Aman" wet-season rice growing period from late summer to early winter. Annually, the ratio of RE to gross primary production (GPP) was 0.67, indicating a net sink of carbon; the two growing seasons had RE/GPP ratios of 0.58 and 0.52. A model using Ts, SWC, and aboveground biomass predicted daily RE with R2 values of 0.87 and 0.62 for the Boro and Aman seasons, respectively.
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RC C3059: 'My commets', Anonymous Referee #1, 13 Sep 2011
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RC C3574: 'Referee comments on the manuscript “Seasonality of ecosystem respiration in a double-cropping paddy field in Bangladesh” by Hossen et al.', Anonymous Referee #2, 14 Oct 2011
- Printer-friendly version
- Supplement
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RC C3059: 'My commets', Anonymous Referee #1, 13 Sep 2011
-
RC C3574: 'Referee comments on the manuscript “Seasonality of ecosystem respiration in a double-cropping paddy field in Bangladesh” by Hossen et al.', Anonymous Referee #2, 14 Oct 2011
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Cited
10 citations as recorded by crossref.
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- Eight years of variations in ecosystem respiration over a residue-incorporated rotation cropland and its controlling factors X. Bao et al. 10.1016/j.scitotenv.2020.139325
- Progress in water and energy flux studies in Asia: A review focused on eddy covariance measurements . Minseok KANG & . Sungsik CHO 10.2480/agrmet.D-20-00036
- Supplement understanding of the relative importance of biophysical factors in determination of photosynthetic capacity and photosynthetic productivity in rice ecosystems W. Xue et al. 10.1016/j.agrformet.2016.10.009
- Banding of Fertilizer Improves Phosphorus Acquisition and Yield of Zero Tillage Maize by Concentrating Phosphorus in Surface Soil M. Alam et al. 10.3390/su10093234
- Net ecosystem CO2 exchange and carbon cycling in tropical lowland flooded rice ecosystem P. Bhattacharyya et al. 10.1007/s10705-013-9553-1
- Seasonal Variation of Carbon Dioxide and Energy Fluxes During the Rice Cropping Season at Rice-barley Double Cropping Paddy Field of Gimje S. Min et al. 10.5532/KJAFM.2013.15.4.273
- Water use efficiency of a rice paddy field in Liaohe Delta, Northeast China Y. Wang et al. 10.1016/j.agwat.2017.03.029
- Variations of carbon dioxide exchange in paddy field ecosystem under water-saving irrigation in Southeast China S. Yang et al. 10.1016/j.agwat.2015.12.015
