INFLUENCE OF ORGANIC FERTILIZATION WITH OR WITHOUT MINERAL FERTILIZER ON SOME CHEMICAL CHARACTERISTICS OF EUTRIC FLUVISOLS
2010
Veronica Tănase | M. Dumitru | D.M. Motelică | Nicoleta Vrînceanu | Mihaela Preda | Alexandrina Manea
Manure from cattle was composted and used as fertilizer in a field experience organised on Eutric Fluvisols. There were studied the changes of chemical characteristics of soil under the influence of organic fertilization with or without mineral fertilization. Organic fertilization did not resulted in significant changes in soil reaction but mineral fertilization produced significant decreases of pH values. There was also observed a slight increase in organic carbon content in variants fertilised with composted manure, and after mineral fertilization also, but the increases were not statistically significant. Considering total nitrogen content were observed statistically significant increases after mineral fertilization with high doses (N100P100). The combination of the two fertilization systems has led to best results at highest doses both for organic and mineral fertilizers. Ratio C/N did not lead to statistically significant changes after organic or mineral fertilization. The highest values of mobile phosphorus in the soil were recorded in variants fertilized with high doses of compost plus mineral fertilizer. Mobile potassium values were statistically significantly increased compared to the control under the influence of fertilization with compost made from cattle manure at a dose equivalent to 400 kg N/ha.
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