English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/75265
Compartir / Impacto:
Título : Soil biochemical properties in a semiarid Mediterranean agroecosystem as affected by long-term tillage and N fertilization
Autor : Álvaro-Fuentes, Jorge ; Morell Soler, Francisco Joaquín; Madejón, Engracia ; Lampurlanés Castel, Jorge; Arrúe Ugarte, José Luis ; Cantero-Martínez, Carlos
Palabras clave : Conservation tillage
Traditional tillage
Dryland farming
Soil microbial activity
Fecha de publicación : may-2013
Editor: Elsevier
Citación : Soil and Tillage Research 129: 69–74 (2013)
Resumen: Tillage and N fertilization practices contribute to the balance between soil C inputs and outputs. Thus, the impacts of both practices and their interactions on soil organic C (SOC) dynamics must be studied. The main objective of this study was to determine long-term effects of tillage and N fertilization on soil biochemical properties in a long-term experiment established in 1996 on a dryland Typic Xerofluvent soil cropped with barley (Hordeum vulgare L.) in NE Spain. The response of SOC concentration, soil microbial biomass carbon (SMBC) and soil enzyme activities (DHA, dehydrogenase, and PRA, protease) to different tillage (no-tillage, NT; reduced tillage, RT; and conventional tillage, CT) and N treatments (zero, 0 kg N ha−1; medium, 60 kg N ha−1; and high, 120 kg N ha−1) were measured in 2008 at four soil depths (i.e., 0–5, 5–10, 10–25 and 25–50 cm). All the soil biochemical properties studied showed significant differences for tillage, depth and the interaction between tillage and soil depth. However, N fertilization rates only affected the SMBC content, which was greater under 120 kg N ha−1 than under 0 kg N ha−1 in the 10–25 cm soil layer. In the soil surface layer (0–5 cm), SOC, SMBC and DHA levels in CT were about 50% of the levels in the NT plots. However, in the 10–25 cm soil layer, a greater SOC concentration in CT compared with NT and RT was also accompanied by SMBC and DHA values 30% higher in CT. Below 25 cm soil depth, similar values of soil biochemical properties were found among tillage systems. There was a significant correlation among almost all the parameters studied, with the greatest correlations between SOC and SMBC and between SOC and DHA. In semiarid Mediterranean conditions, after 12 years of experiment, tillage impacted soil biochemical properties in a greater extent compared with N fertilization even though this effect was only limited to the upper soil layers.
Descripción : 27 páginas, 6 tablas, 1 figura.-- El pdf es el borrador del artículo.
Versión del editor: http://dx.doi.org/10.1016/j.still.2013.01.005
URI : http://hdl.handle.net/10261/75265
DOI: 10.1016/j.still.2013.01.005
ISSN: 0167-1987
Aparece en las colecciones: (EEAD) Artículos
(IRNAS) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Soil biochemical.pdf117,69 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 



NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.