PREVENTION AND THE CORRECTION OF MICRONUTRIENTS DISORDERS IN MAIZE AND SUNFLOWER PLANTS

The paper presents the research concerning the elaboration and testing of an unconventional fertilization technology for maize and sunflower crops, which will prevent and correct the nutrition disorders in plant, especially in Zn.The two new foliar fertilizers have a complex composition: mineral macronutrients (N, P, K), micronutrients (Cu, Fe, Mn, Mo, Zn) and physiologically active substances (aminoacids, peptides). The agrochemical testing of the two foliar fertilizers was carried out in the greenhouse of ICPA Bucharest, with maize and sunflower crops. The soil was Vermic Chernozems from Fetesti, with the following properties: weak alkaline reaction and excesive phosphorous status, these being the potential conditions for zinc deficiency in soils. The applications of these foliar fertilizers ensured important yield increases of dry matter, on both crops. Also, the foliar fertilizers assured the increases of the micronutrients (Mn, Zn) content in the dry matter of plants.