Soil carbon dioxide flux and organic carbon content: effects of tillage and nitrogen fertilization
Morell Soler, Francisco Joaquín
MetadataShow full item record
Th e response of soil CO2 fl ux to long-term tillage practices (no-tillage, NT; minimum tillage, MT; conventional tillage, CT) and N fertilization level (zero; medium, 60 kg N ha–1; high, 120 kg N ha–1) was studied during three growing season in a rainfed Mediterranean agroecosystem. Soil CO2 fl ux was related to the crop growth, with the highest fl ux during spring (i.e., March–May). Tillage and N fertilization eff ects on soil CO2 fl ux during growing seasons depended on weather conditions: greater soil CO2 fl ux under MT and NT on dry years, greater under CT and MT on a wet year. Nitrogen fertilization aff ected soil CO2 fl ux during this wet growing season: fl ux with N fertilizer additions was higher than fl ux on the unfertilized plots. Th irteen years aft er establishment of the experiment, the soil organic carbon (SOC) stock under long-term NT was 3.9 Mg C ha–1 greater than under CT and 4.3 Mg C ha–1 greater than under MT. Th e SOC stocks with N fertilizer additions were 4 Mg C ha–1 greater than the stock on unfertilized plots. Th e increase of C inputs with N fertilization was more pronounced under NT than under MT or CT. For this reason the increased response of SOC stock to N fertilization is expected under NT in a longer period of time. Th e product between soil water content and soil temperature explained between 75 and 94% of the seasonal variability of soil CO2 fl ux. However, soil CO2 fl ux and SOC stock were hardly related.
Is part ofSoil Science Society of America Journal, 2011, vol. 75, núm. 5, p. 1874-1884
European research projects
Showing items related by title, author, creator and subject.
Álvaro-Fuentes, Jorge; Morell Soler, Francisco Joaquín; Plaza Bonilla, Daniel; Arrúe, José Luis; Cantero-Martínez, Carlos (Elsevier, 2012)Agricultural management plays an important role in global warming mitigation due to its effects on soil organic carbon (SOC) dynamics. In Mediterranean agroecosystems, the interactive effects of tillage and N fertilization ...
Soil CO2 fluxes following tillage and rainfall events in a semiarid Mediterranean agroecosystem: Effects of tillage systems and nitrogen fertilization Morell Soler, Francisco Joaquín; Álvaro-Fuentes, Jorge; Lampurlanés Castel, Jorge; Cantero-Martínez, Carlos (Elsevier, 2010)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 ...
Álvaro-Fuentes, Jorge; Plaza Bonilla, Daniel; Arrúe, José Luis; Lampurlanés Castel, Jorge; Cantero-Martínez, Carlos (Springer, 2014)The duration of soil organic carbon (SOC) sequestration in agricultural soils varies according to soil management, land-use history and soil and climate conditions. Despite several experiments have reported SOC sequestration ...