THE BIOSTIMULATORY EFFECT OF BROWN ALGAE ASCOPHYLLUM NODOSUM ON GRAPEVINE

Currently, the global wine industry is facing numerous challenges related to climate change and the unpredictability of weather conditions. The administration of biostimulants derived from algae to grapevines brings a series of benefits that translate into increased and quality productions.Two biostimulators containing Ascophyllum nodosum were tested in a vineyard on Chasselas Dore grapes. The testing involved three foliar applications at a 0.5% concentration during the vegetative phase. The use of the products with algae led to increases in yield cu 33.3% (AN product) și 38.7% (AN-ME product). The application of the three foliar treatments with an vegetable biostimulant increased by 46.6 – 48.5% the process of photosynthetic assimilation in the vineyard. Also, the nutrient content in the plant (leaves and clusters) has recorded a significant increase.