Influence of olive mill waste application on the role of soil as a carbon source or sink |
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| Authors: | R Carbonell-Bojollo R Ordóñez-Fernández A Rodríguez-Lizana |
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| Institution: | 1. área de Producción Ecológica y Recursos Naturales, Centro “Alameda del Obispo”, IFAPA, Apdo. 3092, 14080, Cordova, Spain
2. área de Ingeniería Agroforestal. Dpto. de Ingeniería Aeroespacial y Mecánica de Fluidos. EUITA, Univ. de Sevilla, Carretera de Utrera Km. 1., 41013, Seville, Spain
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| Abstract: | Organic matter (OM) is involved in the enhancement of soil quality since it acts on soil structure, nutrient storage and biological activity. Organic carbon (OC), the dominant element constituent of OM, and related soil properties are probably the most widely acknowledged indicator of soil quality. The typically Mediterranean climate of the South of Spain promotes low yields on crops and low organic carbon in soil. The present work was carried out to evaluate the effect of the application of alperujo, olive oil waste difficult to eliminate, on the fixation or emission of carbon on soil in an olive grove situated in Montoro (Córdoba, Spain). In the study three treatments were considered: 15 kg (A), 7.5 kg (B), 0 kg (C) of alperujo per tree and the implementation of the amendment has been made for three consecutive years. The results confirm the benefits of the amendment on the carbon content organic soil with a fixation with respect to control of 4.8 and 6.1 t ha???1 for the first year and 8.7 and 6.8 t ha???1 for the second in treatments A and B, respectively. Of the different climatic agents considered in the study, it was the temperature which had a major influence on the emissions of CO2 into the atmosphere and the flow of gas presented the highest values in soils treated with the highest dose. |
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