Foliar Fertilization Effect of Supplementing the Fertilization of the Soil on the Production of Potato Tubers

Abstract

Present worldwide debate, including certain national approaches, lead to highly diversified tendencies for the implementation of agricultural systems involving a higher or lesser role played by fertilizer employment in their success, but they are all called to make a contribution to the achievement of qualitative and quantitative food quantities, while increasing soil fertility and environmental protection. In terms of scientific fundamentals with regard to complex food chain effects, all agricultural systems are perfectible and thus make it impossible for an ultimate and complete achievement of objectives set by human society, cosumers and soil fertility increase requirements.
 Potato crop fertilizer application does not always bear the mark of the agricultural systems in terms of varieties, content and doses applied, as the purpose and importance of this crop frequently determines attention granted to the achievement of high production results that are much better than in other plants. In this context, the objectives of our research, as well as the research-experiment of the effect of foliar fertilizer assortments ultimately provide applicable variants for agricultural practice that are applied on the inside and the outside of the practised agricultural system.
 The present paper aims at preseting the results obtained by applying a wide range of foliar fertilizers on the Redsec variety, during the 2005, 2006 and 2007, when the productive effect of these fertilizers was highlighted and differentiated according to the fertilizer assortment and conditions of application.
 Differentiation of effects obtained by foliar fertilizer application and the level of tuber production are dependant on the application of these fertilizers through varieties exhibiting an essential macroelement nutritive balance or i the particular coposition, there is a predominance of nitrogen presence and concentration (such assortments like Lecol, Folifert and Fortifert). These results show that the effect of foliar fertilizers applied is first due to the involvement of these compositions within the nitrogen cycle and its assimilatio that can be capitalized at an optimal level through the simultaneous representation of phosphorus and potassium in their composition.