Publicada por la Sociedad Española de la Ciencia del Suelo
Volumen 6. Diciembre 1999. pág 59-71.
EMISIÓN DE CO2 Y MINERALIZACIÓN DE NITRÓGENO EN UN SUELO PREVIAMENTE TRATADO CON LODO DE DEPURADORA
M. Quemada y E. Menacho
Departamento de Producción Agraria. Universidad Pública de Navarra. Campus Arrosadia s/n. 31006 Pamplona.
Abstract: We investigated the effect of sewage sludge application on soil respiration and nitrogen availability of field plots located in Arazuri (Navarra, Spain). Plots amended with sewage sludge (80 Mg ha-1 or 40 Mg ha-1) in September 1995 or left unamended were used to measure soil respiration and N mineralization indexes after one year. Soil respiration data were collected in 6 different dates by using a portable infrared analyzer. Cumulative N mineralized from soil samles incubated during 16 weeks was used to estimate the soil N mineralization potential (No) and the mineralization rate coefficients (k). Soil respiration was larger for soils that received 80 Mg ha-1 of sewage sludge one year before the study than for unamended soils. Soils that received 40 Mg ha-1 of sewage sludge respired more than unamended soils on only two sampling dates. Sludge-treated soils had larger No and k values than the control treatment.
Key words: carbon dioxide, soil respiration, mineralization, nitrogen, sludge, Navarra (Spain).
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