Fecha/hora: 23/05/2024 05:52:25

Biblioteca(s): 	INIA La Estanzuela; INIA Treinta y Tres.	
Fecha corriente: 	06/10/2014	
Fecha de la última actualización: 	31/07/2019	
Autoria: 	JORGE, G.; PÉREZ BIDEGAIN, M.; TERRA, J.A.; SAWCHIK, J.	
Afiliación: 	JOSÉ ALFREDO TERRA FERNÁNDEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JORGE SAWCHIK PINTOS, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay.	
Título: 	WEPP as a tool for enabling a more comprehensive analysis of the environmental impacts of soil erosion.	
Año de publicación: 	2012	
Fuente/Imprenta: 	In: INTERNATIONAL SOIL TILLAGE RESEARCH ORGANIZATION. 19., SOCIEDAD URUGUAYA DE CIENCIA DEL SUELO, 4., 2012, Montevideo, UY. [Oral presentation]: paper no. 133. Montevideo, UY: ISTRO, 2012.	
Idioma: 	Español
Inglés	
Notas: 	También publicado en: Agrociencia Uruguay, v. 16, n. especial, p. 268-273, 2012.	
Contenido: 	ABSTRACT.
Cropland area in Uruguay, mostly soybeans, increased 300% during the last decade due to expansion to new areas. Although no-tillage practices are generalized among farmers, soil erosion is still a major environmental and economic issue. A predictive tool as the Water Erosion Prediction Model Project (WEPP), based on soil processes, has never been used in Uruguay. The objective of this research was to evaluate the soil erosion impact of various managements of intensive agriculture on Mollisols of Uruguay, applying the WEPP erosion model. The model was fi rst adjusted and validated for annual erosion estimates of an Abruptic Argiudoll (Nash Sutcliffe (NS)= 0.81 and R2  = 0.89) and a
Vertic Argiudoll (NS= 0.86 and R2 = 0.90), and later applied to evaluate three Mollisols and one Vertisol with different soil managements. Treatments combined no tillage (NT) and reduced tillage (RT) with different crop rotations. Crop rotations were: continuous soybean (CS), soybean-wheat (SW), soybean-winter cover crop (S-Cover crop), cornsoybean-wheat-3/4 yr pasture (CSW-PPP/PPPP), and corn-soybean-wheat-soybean-wheat-3/4 yr pasture (CSWSWPPP/PPPP). Soil erosion under RT system or CS was always above 7Mg.ha-1 (T value). Pastures inclusion under NT showed values below 7 Mg.ha-1.WEPP simulated an average erosion rate below T for SW rotation with NT (100m; 3% slope) in three of the four soils studied. However, by varying the slope and the length of the hillslope, the range for which the average annual erosion remains below this level is limited (only 3% - 4%). Moreover, for those hillslopes
whose average annual erosion does not exceed the T value, there is still approximately a 25% probability that this may occur any given year. Our work highlights the potential of using WEPP in the development of criteria for assessing sustainability of soil management, alternative to T value of average annual erosion units, including risk analysis	
Palabras-Clave: 	WATER EROSION PREDICTION PROJECT MODEL; WEPP MODEL.	
Thesagro: 	EROSIÓN DEL SUELO; MODELOS; MODELOS DE PREDICCIÓN; URUGUAY; WATER EROSION PREDICTION PROJECT MODEL; WEPP MODEL.	
Categoría del tema: 	P36 Erosión  conservación y recuperación del suelo	
URL: 	http://www.ainfo.inia.uy/digital/bitstream/item/12187/1/Agrociencia-ISTRO-2012-2.-Gabriella-J..pdf	
Registro original: 	INIA La Estanzuela (LE)	
Ejemplares: 	LE - (100432-1) - PXI - AP - DD -  -  -  - DIS
TT - (32057-1) - PXI - PL - PP - PP/AGROCIENCIA/2012 -  -  - DIS