CORRELATIONS BETWEEN THE YIELD DIFFERENCES OF SPRING WHEAT, OBTAINED ON A POLLUTED HAPLIC LUVISOIL WITH CRUDE OIL, DEPENDING ON WEATHER CONDITIONSAND FERTILIZATION SYSTEMS ON THE MITIGATION PERIOD
Journal Title: Natural Resources and Sustainable Development - Year 2015, Vol 5, Issue 1
Abstract
Among the different technologies used today to improve cultivated soils polluted with crude oil, the bioremediation of organic pollutants in the field, it is most commonly used, especially for the lower concentrations of pollutants because it is a method environmentally friendly and due to their reduced costs. Research on improving the polluted with oil residue soils were held on a haplic luvisoil, planted with spring wheat, using for the stimulation of crude oil biodegradation, organic fertilization (manure) and mineral fertilization (NPK) systems. The average values of the yield differences between the variants unpolluted (a0) and polluted by 3% crude oil (a1) varies inversely with the quantity of manure and complex fertilizers applied, ranging between 1.86 q/ha, on the variants without fertilization and -0.03 q/ha for the maximum doses of fertilizers applied. The bifactorial spatial correlations (3D) between yield differences (a0-a1) made of spring wheat (q/ha) and climatic characteristics of the vegetation period X1 (rainfall, mm; average temperatures, °C; the de Martonne aridity index, mm/°C) and the fertilization systems applied X2 (manure, complex fertilizers, NPK and organic and mineral fertilization respectively), without the interaction between factor, are very significant statistically. The biggest yield differences, betweenthe fertilization systems analyzed were obtained for the values of de Martonne aridity index between 25 and 35, values which characterize the vegetation periods in question as being from medium to very rainy, while the smallest yield differences for de Martonne aridity index values of 16.13, that indicate an excessively dry growing season.
Authors and Affiliations
Nicu Cornel Sabău, Maria Sandor
Keywords
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