RESEARCH ON ALTERNATIVES AND STRATEGIES FOR FOLIAR FERTILIZATION WITHIN DIFFERENTIATED FERTILIZATION SYSTEMS FOR MAIZE CROP PUBLISHED

Constantin TOADER, Marilena MĂRGHITAŞ, M. RUSU, Mihaela MIHAI
Abstract: Foliar fertilizers are unanimously considered stimulating and corrective products for mineral nutrition. They exhibit a secondary fertilizing role, that determines a significant increase of the productive consumption for soil elements and soil-applied elements without substituting root fertilization methods (through the soil), where foliar fretilizers are supplementary (complemantry) in balancing and optimizing the fertilization system applied to agricultural and horticultural plants (Ryan J., 2002), (Rusu M. et al., 2008), (Dana Daniela et al., 2008), (Dorneanu A. et al., 2005). The aim of the hereby research envisions the rationalization of mineral fertilizing inputs and their reduction, by means of promoting an alternative, as well as strategies for an efficient involvemen of unconventional resources (foliar fertilizers) in the differentiated fertilization systems. Throughout the research period the effect of differentiated fertilizations were studied by pursuing the differentiation of maize grain productions according to the type of foliar fertilizer employed and the interaction of foliar fertilization within the structure of soil fertilization systems. In order to achieve the previously-stated research objectives field experiements were conducted at SDE Cojocna of the University of Agricultural Sciences and Veterinary Medicine, in 2011. They were set on a cambic chernozem, for maize crop, involving different foliar fertilizer varieties, devoid of soil fertilization, as well as testing these fertilizers in interaction with the basic soil fertilization in doses of 100 kg/ha s.a. N and P. Production results obtained as a consequence of the experimentation reveal the essential character of foliar fertilization, alongside and optimum provision of nutritive elements. The application of foliar fertilizers in plants has had a complementary sole providing higher coefficients for the employment of the active substance in the soil or applied to the soil. These experiments in researching the effects of unconventional fertilization sources (foliar fertilizers) grant a special importance, originality and high degre of novelty on the field of agrochemistry, due to the fact that new foliar fertilizer varieties were employed with different combinations of nutrients in the mixture. The paper was supported by the project – POST-DOCTORAL SCHOOL IN THE FIELD OF AGRICULTURE AND VETERINARY MEDICINE Contract n.: POSDRU/89/1.5/S/62371
productions, nutrients, foliar fertilizers, fertilization
Presentation: oral

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