The effect of plant biostimulants on the macronutrient content and ion ratio of several lettuce (Lactuca sativa L.) cultivars grown in a plastic house

Plant biostimulants have been identified as one of the most important agronomic factors that scientists looking for in a range natural sources over last few decades. The purpose these experiments was to see how plant (Willow bark extract, Bistep, and combination Willow+Bistep (W+B)) affect macronutrient content ion ratio three lettuce cultivars (May King, Kobak, Great Lakes) from 2019 2021. Willow extract diluted 3% applied plants through irrigation with amount 50–60 mL plant−1, whereas Bistep sprayed every two weeks transplanting accordance manufacturer's recommendations at 0.05% 20 plant−1. data demonstrate grown seasons, treatments W+B were effective impacting ratio, least effective. In comparison untreated plants, macronutrients (Ca2+, Mg2+, P) leaves rose by 18%, 13%, 9%, respectively, treated period years, while, potassium (K+) significantly reduced 15%. Sodium level, on other hand, improved using 33%, 57% 72%, respectively. Ca2+ Mg2+ levels substantially higher season when climate cooler air humidity higher, but Na+, K+, P 2020 temperature somewhat warmer dryer. Among cultivars, Lakes has greater level K+), however, Kobak contained much phosphorus (P) 301.41 (mg kg−1 DM). enhanced ratios Na+: only substantial improvement Ca2+: 2021, particularly variety 20%. Biostimulants, decreased mass (K++Na+): (Ca2++Mg2+) cultivars. biostimulants, had highest influence nutritional absorption although least. composition ionic varied according cultivar differences conditions. our 3-year experiments, we discovered 2020, ratio.