Full TGIF Record # 87271
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Web URL(s):https://dl.sciencesocieties.org/publications/jeq/articles/32/3/916
    Last checked: 12/16/2016
https://dl.sciencesocieties.org/publications/jeq/pdfs/32/3/916
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Publication Type:
i
Refereed
Author(s):Cavero, J.; Beltrán, A.; AragLüés, R.
Author Affiliation:Cavero: Dep. Genética y Producción Vegetal, Estacion Experimental de Aula Dei (CSIC), and Laboratorio de Agronomía y Medio Ambiente (DGA-CSIC), Zaragoza, Spain; Beltrán: Dirección General de Estructuras Agrarias (DGA), Zaragoza, Spain; Aragüés: Unidad de Suelos y Riegos, Servicio de Investigación Agroalimentaria (DGA), and Laboratorio de Agronomía y Medio Ambiente (DGA-CSIC), Zaragoza, Spain
Title:Nitrate exported in drainage waters of two sprinkler-irrigated watersheds
Section:Landscape and watershed processes
Other records with the "Landscape and watershed processes" Section
Source:Journal of Environmental Quality. Vol. 32, No. 3, May/June 2003, p. 916-926.
Publishing Information:Madison, Wisconsin: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
# of Pages:11
Keywords:TIC Keywords: Nitrates; Drainage; Sprinklers; Watersheds; Irrigation; Irrigation practices; Nitrogen; Water pollution
Abstract/Contents:"Nitrate contamination of surface waters has been linked to irrigated agriculture across the world. We determined the NO3-N loads in the drainage waters of two sprinkler-irrigated watersheds located in the Ebro River basin (Spain) and their relationship to irrigation and N management. Crop water requirements, irrigation, N fertilization, and the volume and NO3-N concentration of drainage waters were measured or estimated during two-year (Watershed A; 494 irrigated ha) and one-year (Watershed B; 470 irrigated ha) study periods. Maize (Zea mays L.) and alfalfa (Medicago sativa L.) were grown in 40 to 60% and 15 to 33% of the irrigated areas, respectively. The seasonal irrigation performance index (IPI) ranged from 92 to 100%, indicating high-fquality management of irrigation. However, the IPI varied among fields and overirrigation occured in 17 to 44% of the area. Soil and maize stalk nitrate contents measured at harvest indicated that N fertilizer rates could be decreased. Drainage flows were 68 mm yr-1 in Watershed A and 194 mm yr-1 in Watershed B. Drainage NO3-N concentrations were independent of drainage flows and similar in the irrigated and nonirrigated periods (average: 23-29 mg L-1). Drainage flows determined the exported mass of NO3-N, which varied from 18 (Watershed A) to 49 (Watershed B) kg ha-1yr-1, representing 8 (Watershed A) and 22% (Watershed B) of the applied fertilizer plus manure N. High-quality irrigation management coupled to the split application of N through the sprinkler systems allowed a reasonable compromise between profitability and reduced N pollution in irrigation return flows."
Language:English
References:44
Note:Figures
Tables
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cavero, J., A. Beltrán, and R. AragLüés. 2003. Nitrate exported in drainage waters of two sprinkler-irrigated watersheds. J. Environ. Qual. 32(3):p. 916-926.
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https://dl.sciencesocieties.org/publications/jeq/articles/32/3/916
    Last checked: 12/16/2016
https://dl.sciencesocieties.org/publications/jeq/pdfs/32/3/916
    Last checked: 12/16/2016
    Requires: PDF Reader
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