Recycling of wastewater from the cultivation of Spirulina platensis through its use as a biostimulant for the germination oF Phacelia tanacetifolia Benth. (Melifera) seeds maintained in collections [Articol]

Abstract

This article presents the experimental results obtained from the application of a biostimulant based on wastewater derived from the cultivation of the cyanobacterium Spirulina platensis in various concentrations, on the germination of Phacelia tanacetifolia (Melifera) seeds, maintained under collection conditions for 1 and 4 years. The results show that the seeds treated with biostimulants have a higher germination capacity compared to those in the control group, where germination ranged from 28-40%. The highest germination rates were obtained for the 1-year-old seeds (56%) treated for 1 hour with a biostimulant at a 2% concentration, while for the 4-year-old seeds (54%), the best results were recorded at a 1% concentration with a 1-hour treatment period. The application of the biostimulant contributed to the relative elongation of the root system of the studied culture. Based on the conducted research, we can conclude that the application of the investigated biostimulant has the effect of stimulating seed germination and root elongation in seedlings, which provides grounds to consider that it demonstrates a positive effect and could be practically applied.