Biostimulant-induced drought tolerance in grapevine is associated with physiological and biochemical changes

Chemical and Biological Technologies in Agriculture

Table 3 Active ingredient of biostimulants employed in the study

Biostimulants	Active ingredient W/W %
AA	Total amino acids 14.4%; l-amino acids 12%; total nitrogen 7%
HA	K₂O 10%; HA 55%; FA 15%
FA	Total nitrogen 3%; K₂O 10%; FA 50%; chlorine 4.3%
SE	Alginic acid 16%; mannitol 4–6%; amino acid 0.5%; total nitrogen 1.2%; P₂O₅ 1%; K₂O 17%; cytokinin and gibberellin 600 ppm; vitamins and other hormones 5000 ppm; sulfur 1.5%; calcium 0.4%; magnesium 0.2%; iron 200 ppm; zinc 100 ppm; manganese 10 ppm; copper 6 ppm; boron 20 ppm; molybdenum 5 ppm