THE INFLUENCE OF THE FERTILIZATION SYSTEMS ON PRODUCTION IN THE LAST YEARS OF AGROCHEMICAL IMPROVEMENT OF A CRUDE OIL POLLUTED SOIL
Journal Title: Natural Resources and Sustainable Development - Year 2013, Vol 3, Issue 1
Abstract
Among the many methods used for remediation of soils contaminated with oil residues, the stimulated biodegradation method on field is one of the most used because it is environmentally friendly and it has low costs compared to other methods. The objective of our research is bioremediation of a haplic luvisol, on the experimental field from Research and Development Station Oradea, under control polluted with crude oil brought from Suplacu de Barcău, Bihor county, at a concentration of 3 % per the arable layer by cultivating millet and spring wheat and the stimulation of biodegradation by applying systems of organic and mineral fertilization. Achieved average yields of spring wheat, in the last seven years of experiment varied within very large limits and yield differences were significant statistically for organic fertilized variants and without statistical significance for the variants fertilized with complex fertilizers. Variance analysis method for multiple comparisons, using Duncan test demonstrated that the small doses of complex fertilizers (NPK) without the administration of manure (M) do not have statistically significant yield increases, and when applying high doses of complex fertilizers in association with manure (NPK x M ) they have statistically significant effect. The best results were obtained for the variant polluted, which were given 150 t / ha manure and the highest dose tested of complex fertilizers (N300P240K210,) the growth of production in comparison with no fertilization variant being of 97.7%. The second degree polynomial correlations established for annual production and time, distinct significant statistically for the variations without the stimulation of biodegradation and significant statistically for the variations with stimulated biodegradation, using maximum quantities of manure and complex fertilizers shows that bioremediation period extends up to eight years.
Authors and Affiliations
Nicu Cornel Sabău, Maria Șandor
Keywords
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