Evaluation of the biostimulant effect on plants with microalgae extracts obtained from a circular economy process
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Abstract
This study evaluated the biostimulant effect of seven microalgae extracts applied to cucumber plants in small pots. The trials were conducted at the Cajamar "Las Palmerillas" Experimental Station, with root applications of different microalgae extracts provided by Biorizon Biotech as part of the Alceres project. Microalgae have emerged as a sustainable alternative to traditional agrochemicals. They contain essential nutrients and phytohormones that promote plant growth and improve soil fertility. The extracts were obtained from three microalgae strains using mechanical-enzymatic methods and biocompatible solvents. The results showed that the extracts corresponding to the ALC1 and ALC3 treatments applied to the root zone of cucumber plants had a significant effect on plant growth and development, highlighting a greater increase in height (21.7 and 22.5 cm), number of leaves (5.4 and 5.3 leaves) and chlorophyll content (SPAD) (22 DDT, ALC1 42.9 μmoles m-² and ALC3 37.6 μmoles m-²), compared to the control and the rest of the treatments. Vegetative dry matter, leaf area and root dry matter were also significantly higher in these treatments (ALC1 and ALC3), with higher values than the rest of the treatments.
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