Soil application of hydrolysed protein based biostimulants coupled with microelements in Friuli Venezia Giulia vineyards

Soil pills biostimulants were tested for two following seasons in two vineyards grown with Sauvignon blanc and Glera, respectively, in comparison with an equivalent chemical fertilisation. The plant water status was slightly improved in case of Sauvignon blanc that experienced in both seasons conditions of severe water stress, resulting in higher acidity and lower pH. The Glera vineyard did not express the same improvements, likely because being under irrigation, it did not experience any drought during both seasons. The soil pills showed also a positive effect on wine sensory properties, improving the tropical descriptor of Sauvignon blanc wines, and the flavour descriptors of Glera.