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Title

Agricultural use of three organic residues: Effect on orange production and on properties of a soil of the 'Comarca Costa de Huelva' (SW Spain)

AuthorsMadejón, Engracia ; Burgos, Pilar ; López Núñez, Rafael ; Cabrera, Francisco
Issue Date2003
PublisherKluwer Academic Publishers
CitationNutrient Cycling in Agroecosystems 65(3): 281-288 (2003)
AbstractDisposal of urban, agricultural and industrial organic residues implies an increasing problem because of all the economic and environmental repercussions involved. One of the most adequate ways of managing this problem is the agricultural use of these wastes as organic amendments. Three organic residues (AC, olive mill waste water sludge compost; MWC, municipal solid waste compost; and PS, paper mill sludge) were used in a 3-year field experiment involving orange production. The effect of their application on crop production and on soil quality was investigated. Soil samples (0-20 cm depth) collected 11 months after the last soil amendment were analysed for: pH and EC, Kjeldahl-N, available-P, available-K, total organic carbon, humic substances, dehydrogenase, phosphatase, β-glucosidase, urease and benzoyl-argininamide hydrolysing protease (BAA-protease) activities. Generally, the application of the MWC and PS increased orange yield when compared to control. Moreover, total organic carbon and humic substances significantly increased in soils treated with all the organic amendments. Organic fertilisation increased the Kjeldahl-N and available-P contents of the soil. The application of the organic residues also caused significant increases in dehydrogenase, β-glucosidase, urease and BAA-protease activities of the soil. Significant positive correlations (p < 0.01) between these enzymatic activities and total organic carbon were found for all treatments. Significant positive correlation between dehydrogenase, urease, β-glucosidase, and BAA-protease and orange yield was also found. However, a clear inhibition of phosphatase activity was observed in soils treated with PS. The results indicate that the repeated application to the soil of moderate amounts of organic amendments has positive effects on the chemical and biochemical properties of the soil, as well as on the orange yield.
URIhttp://hdl.handle.net/10261/61952
DOI10.1023/A:1022608828694
Identifiersdoi: 10.1023/A:1022608828694
issn: 1385-1314
e-issn: 1573-0867
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