THE EVOLUTION OF SOME NUTRIENTS OF STAGNIC LUVOSOIL FROM HILLY ZONE OF OLTENIA PUBLISHEDAna Maria DODOCIOIU, R. MOCANU, M. SUSINSKI
The researches have been carried out at Experimental Centre for Pastures Gorj with the aim of observing the effect of different fertilizer doses on the nutrient content of soil under several crops. There researches are in the first year in this hilly area of Oltenia and they are part of COST European Researching Program 869 regarding the ways of reducing nutrient and soil losses from soil and mitigation of ground water and surface water pollution. This paper is a novelty for this area and for our country due to the researching during two years of the evolution of the nutrient content from the soil, N, P, K, slope soil reaction in order to diminish erosion losses. The researching method has consisted of researching the evolution of soil reaction and total nitrogen, mobile phosphorus and potassium contents of a slope soil within 2009-2010 period with the following experimental variants: not fertilized control; N162P81K100 with corn; N138 with corn; not fertilized control with sown pasture; N162P81K100 with sown pasture; N138 with sown pasture; not fertilized control with natural pasture; N162P81K100 with natural pasture; N138 with natural pasture. The determinations have been made using the most advanced researching methods in Europe, according with I.C.P.A. regulations and the European Directive on soil quality. The practical implications have consisted in giving the most appropriate solutions for fertilizer applying to corn, sown pasture and natural pasture as well as for mitigation the soil and nutrient losses. The paper is original because it uses a new researching method in soil quality appreciation namely, the evolution of soil nutrient content. Thus, the paper has, both a theoretical scientifical importance in establishing the dynamics of soil nutrients in correlation with the fertilizer doses and a practical importance in order to elaborate solutions for fertilizing these crops within slope area of Gorj District. The paper is part of the Researching Project T.E. 103 nr. 118/2010.
stagnic luvosoil, agrochemical features, soil acidity, total nitrogen, available phosphorus, available potassium, NPK, natural pasture, sown pasture