Soil CO2 fluxes following tillage and rainfall events in a semiarid Mediterranean agroecosystem: Effects of tillage systems and nitrogen fertilization
Morell Soler, Francisco Joaquín
MetadataShow full item record
The response of soil CO2 flux to tillage operations and rainfall events was studied under semiarid Mediterranean conditions. The study was conducted on a barley monoculture agro-ecosystem during summer/autumn fallow periods in four consecutive years (2005–2008). The study compared three N fertilization
levels (zero, medium; 60 kgNha−1; high, 120 kgNha−1) under three tillage systems (NT, no-tillage; MT, minimum tillage; CT, conventional tillage). Tillage operations led to a pulse of soil CO2 flux. This pulse was linearly related to soil CO2 flux on the day before tillage operations under MT (slope = 4.22) and CT (slope = 16.7), indicating the extent of soil disturbances. However, the associated soil CO2-C losses during tillage operations were reduced and similar among different tillage systems. The soil CO2 flux after rainfall was higher under NT, where it was linearly related to soil temperatures (0.15×soil temperature–1.06). Soil CO2 fluxes decreased on the following days as the soil dried. N fertilization affected CO2 flux in 5 out of 35 observation days, with higher fluxes with N fertilization under conservation tillage systems. Emissions after rainfall events led to large soil CO2-C losses, and these were of higher magnitude under conservation tillage systems (NT and MT).
Is part ofAgriculture, Ecosystems and Environment, 2010, vol. 139, p. 167-173
Showing items related by title, author, creator and subject.
Soil biochemical properties in a semiarid Mediterranean agroecosystem as affected by long-term tillage and N fertilization Morell Soler, Francisco Joaquín; Lampurlanés Castel, Jorge; Cantero-Martínez, Carlos; Arrúe, José Luis; Álvaro-Fuentes, Jorge; Madejón, E. (Elsevier, 2013)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 ...
Yield and water use efficiency of barley in a semiarid Mediterranean agroecosystem: long-term effects of tillage and N fertilization Morell Soler, Francisco Joaquín; Lampurlanés Castel, Jorge; Álvaro-Fuentes, Jorge; Cantero-Martínez, Carlos (Elsevier, 2011)Conservation tillage systems (no-tillage, NT; and minimum tillage, MT) are being adopted in rainfed agroecosystems of the Mediterranean basin where water availability is the main limiting factor for crop productivity. ...
Root respiration of barley in a semiarid Mediterranean agroecosystem: field and modelling approaches Morell Soler, Francisco Joaquín; Whitmore, A. P.; Álvaro-Fuentes, Jorge; Lampurlanés Castel, Jorge; Cantero-Martínez, Carlos (Springer Verlag, 2012)Aims Root respiration is a major contributor to soil CO2 flux, and its response to management practices needs to be evaluated. The aim was to determine the effect of management practices (tillage systems and nitrogen ...