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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 Last checked: 12/16/2016 Requires: PDF Reader |
Publication Type:
| 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
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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
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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 Graphs |
| 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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| 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 Last checked: 12/16/2016 Requires: PDF Reader |
| MSU catalog number: S 900 .J6 |
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