Validation of revised DNDC model for methane emissions from irrigated rice fields in Thailand and sensitivity analysis of key factors

被引:14
作者
Smakgahn, Kruamas [1 ,2 ]
Fumoto, Tamon [1 ]
Yagi, Kazuyuki [1 ]
机构
[1] Natl Inst Agroenvironm Sci, Tsukuba, Ibaraki 3058604, Japan
[2] Kasetsart Univ, Fac Liberal Arts & Sci, Kamphaeng, Saen, Thailand
关键词
ORYZA-SATIVA L; CROPPING SYSTEMS; CH4; EMISSIONS; GAS EMISSIONS; MEKONG DELTA; PADDY FIELDS; FERRIC IRON; SOIL; MITIGATION; FERTILIZER;
D O I
10.1029/2008JG000775
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The original Denitrification-Decomposition ( DNDC) model and a revised version were tested against data from field observations of methane (CH4) emissions from irrigated rice fields in Thailand. The revised DNDC model, which was modified for use in Japanese rice fields by revising the crop growth and soil biogeochemical submodels, yielded better simulation results than the original model. In most cases, daily CH4 fluxes predicted by the revised DNDC model agreed well with observations. Seasonal CH4 emissions simulated by the revised model showed significantly higher correlation with observations than those obtained with the original model. Errors in the simulation appear to have resulted from uncertainties in both the input parameters and the model descriptions. Sensitivity analysis revealed that the revised DNDC model is highly sensitive to the concentration of reducible soil Fe, the rate of rice straw incorporation, and rice root biomass. Therefore, uncertainties in these factors may strongly affect the prediction of CH4 emissions. These results suggest that for reliable prediction of CH4 emissions from Thai rice fields, further work is needed to improve the estimates of reducible soil Fe, to quantify the rate of straw incorporation, and to parameterize the crop submodel for the dominant rice varieties grown in Thailand.
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页数:12
相关论文
共 58 条
[31]   METHANE MITIGATION IN FLOODED LOUISIANA RICE FIELDS [J].
LINDAU, CW ;
BOLLICH, PK ;
DELAUNE, RD ;
MOSIER, AR ;
BRONSON, KF .
BIOLOGY AND FERTILITY OF SOILS, 1993, 15 (03) :174-178
[32]   AVAILABILITY OF FERRIC IRON FOR MICROBIAL REDUCTION IN BOTTOM SEDIMENTS OF THE FRESH-WATER TIDAL POTOMAC RIVER [J].
LOVLEY, DR ;
PHILLIPS, EJP .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1986, 52 (04) :751-757
[33]   Methane emissions and mitigation options in irrigated rice fields in southeast China [J].
Lu, WF ;
Chen, W ;
Duan, BW ;
Guo, WM ;
Lu, Y ;
Lantin, RS ;
Wassmann, R ;
Neue, HU .
NUTRIENT CYCLING IN AGROECOSYSTEMS, 2000, 58 (1-3) :65-73
[34]   Triggering of methane production in rice soils by root exudates: Effects of soil properties and crop management [J].
Mitra, S ;
Aulakh, MS ;
Wassmann, R ;
Olk, DC .
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 2005, 69 (02) :563-570
[35]  
NABHEERONG N, 1995, IRRI DISCUSS PAP SER, V10, P107
[36]  
NABHEERONG N, 1999, NARESUAN U J, V2, P1
[37]   METHANE EMISSION FROM AN INDONESIAN PADDY FIELD SUBJECTED TO SEVERAL FERTILIZER TREATMENTS [J].
NUGROHO, SG ;
LUMBANRAJA, J ;
SUPRAPTO, H ;
SUNYOTO, WSA ;
HARAGUCHI, H ;
KIMURA, M .
SOIL SCIENCE AND PLANT NUTRITION, 1994, 40 (02) :275-281
[38]   Yield response of rice (Oryza sativa L.) genotypes to different types of drought under rainfed lowlands -: Part 3.: Plant factors contributing to drought resistance [J].
Pantuwan, G ;
Fukai, S ;
Cooper, M ;
Rajatasereekul, S ;
O'Toole, JC .
FIELD CROPS RESEARCH, 2002, 73 (2-3) :181-200
[39]   Spatio-temporal distribution of rice phenology and cropping systems in the Mekong Delta with special reference to the seasonal water flow of the Mekong and Bassac rivers [J].
Sakamoto, T ;
Nguyen, NV ;
Ohno, H ;
Ishitsuka, N ;
Yokozawa, M .
REMOTE SENSING OF ENVIRONMENT, 2006, 100 (01) :1-16
[40]   Detecting temporal changes in the extent of annual flooding within the Cambodia and the Vietnamese Mekong Delta from MODIS time-series imagery [J].
Sakamoto, Toshihiro ;
Nguyen, Nhan Van ;
Kotera, Akihiko ;
Ohno, Hiroyuki ;
Ishitsuka, Naoki ;
Yokozawa, Masayuki .
REMOTE SENSING OF ENVIRONMENT, 2007, 109 (03) :295-313