Dozarea şi analiza formelor totale de elemente nutritive din materialul vegetal la soiul Aligote, într-o experienţă staţionară cu îngrăşăminte, în condiţiile Podgoriei Iaşi

Foliar diagnosis of nutrition by chemical analyses is an extended method, by which are analyzed some vegetative parts (especially leave, but also nervures, petiole, young buds, or branches of one year old), determinate the feeding stage of the analyzed plants with nutrition elements, to see the existence of excess or lack situations, to predict the lacks of nutrition during vegetation period, to establish the fertilization recommendations, to evaluate the exports of nutritive elements with yield and to keep the soils’ fertility and also for yields prediction. The paper presents the results obtained by the foliar diagnosis, at the leaves of vines of the variety Aligote, of the content of macroelements, in the three moments of vegetation, using a scheme of fertilization specify. Use of doses minimum of fertilizers manages to attract a proper content of NPK in the plant material, which confirm the need for optimization of doses of fertilizers and also the choice assortment of these fertilizers. This practice, can converge to a steady nutritional optimal, with the avoidance of any excesses, evidenced by the emergence of diseases of nutrition, default by lowering the yields