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Evaluation of the ADAPT Model for Simulating Nitrogen Dynamics in a Tile-Drained Agricultural Watershed in Central Illinois

Journal of environmental quality, 2006-09, Vol.35 (5), p.1914-1923 [Peer Reviewed Journal]

ASA, CSSA, SSSA ;2006 INIST-CNRS ;ISSN: 0047-2425 ;EISSN: 1537-2537 ;DOI: 10.2134/jeq2005.0379 ;PMID: 16973633 ;CODEN: JEVQAA

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Title:
Evaluation of the ADAPT Model for Simulating Nitrogen Dynamics in a Tile-Drained Agricultural Watershed in Central Illinois
Author: Sogbedji, J.M ; McIsaac, G.F
Subjects: Agricultural chemicals ; Agricultural management ; agricultural watersheds ; Agronomy. Soil science and plant productions ; Algorithms ; Applied sciences ; Biological and medical sciences ; corn ; crop yield ; Earth sciences ; Earth, ocean, space ; Engineering and environment geology. Geothermics ; Environmental Monitoring ; Exact sciences and technology ; Fresh Water ; Fundamental and applied biological sciences. Psychology ; Glycine max - growth & development ; hydrologic models ; Illinois ; model validation ; Models, Theoretical ; nitrate nitrogen ; Nitrogen - analysis ; Nitrogen - metabolism ; Pollution ; pollution load ; Pollution, environment geology ; River basins ; rivers ; simulation models ; soil nutrient balance ; soil nutrient dynamics ; soybeans ; Stream flow ; Water Movements ; Water quality ; Watersheds ; Zea mays - growth & development
Is Part Of: Journal of environmental quality, 2006-09, Vol.35 (5), p.1914-1923
Description: Assessing the accuracy of agronomic and water quality simulation models in different soils, land-use systems, and environments provides a basis for using and improving these models. We evaluated the performance of the ADAPT model for simulating riverine nitrate-nitrogen (NO3-N) export from a 1500-km2 watershed in central Illinois, where approximately 85% of the land is used for maize-soybean production and tile drainage is common. Soil chemical properties, crop nitrogen (N) uptake coefficient, dry matter ratio, and a denitrification reduction coefficient were used as calibration parameters to optimize the fit between measured and simulated NO3-N load from the watershed for the 1989 to 1993 period. The applicability of the calibrated parameter values was tested by using these values for simulating the 1994 to 1997 period on the same watershed. Willmott's index of agreement ranged from 0.91 to 0.97 for daily, weekly, monthly, and annual comparisons of riverine nitrate N loads. Simulation accuracy generally decreased as the time interval decreased. Willmott's index for simulated crop yields ranged from 0.91 to 0.99; however, observed crop yields were used as input to the model. The partial N budget results suggested that 52 to 72 kg N ha-1 yr-1 accumulated in the soil, but simulated biological N fixation associated with soybeans was considerably greater than literature values for the region. Improvement of the N fixation algorithms and incorporation of mechanisms that describe soybean yield in response to environmental conditions appear to be needed to improve the performance of the model.
Publisher: Madison: American Society of Agronomy, Crop Science Society of America, Soil Science Society
Language: Chinese;English
Identifier: ISSN: 0047-2425
EISSN: 1537-2537
DOI: 10.2134/jeq2005.0379
PMID: 16973633
CODEN: JEVQAA
Source: AUTh Library subscriptions: ProQuest Central
MEDLINE

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Evaluation of the ADAPT Model for Simulating Nitrogen Dynamics in a Tile-Drained Agricultural Watershed in Central Illinois

ASA, CSSA, SSSA ;2006 INIST-CNRS ;ISSN: 0047-2425 ;EISSN: 1537-2537 ;DOI: 10.2134/jeq2005.0379 ;PMID: 16973633 ;CODEN: JEVQAA

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