Potential applications of cyanobacteria: Spirulina platensis filtrates and homogenates in agriculture

Abstract

In the present paper, products obtained from a blue-green microalga Spirulina platensis filtrate (applied for seed soaking and for foliar spray) and homogenate (used for seed coating) were tested in the cultivation of radish. Their effect on length, wet mass, multielemental composition and the greenness index of the radish leaves was examined. Multi-elemental analyses of the algal products, and radish were also performed using inductively coupled plasma-optical emission spectrometry (ICP-OES). The best soaking time, concentrations of filtrate and doses of homogenate were established. The longest and heaviest plants were observed for homogenate applied at a dose of 300 µL per 1.5 g of seeds and 15% of filtrate applied as foliar spray. The highest chlorophyll content was found in the group treated with 100 µL of homogenate and 5% of filtrate. In the case of soaking time, the longest plants were in the group where seeds were soaked for 6 h, but the heaviest and greenest were after soaking for 48 h. The applied algal products increased the content of elements in seedlings. Obtained results proved that algal extracts have high potential to be applied in modern horticulture and agriculture. The use of Spirulina -based products is consistent with the idea of sustainable agriculture that could help to ensure production of sufficient human food to meet the needs of rising population and protection of the environment.

Maximize Growth and Productivity of Rice by Using N2-Fixing Anabaena oryzae and Spirulina platensis Extract

“…It means that the application of nitrogen fertilizer (urea) with Anabaena inoculation improve growth and productivity of rice plant. This is due to ability of Anabaena oryzae to fix nitrogen and carbon dioxide, and produce ammonia and oxygen (Phathka et al, 2018 andGodlewska et al, 2019). These results agreed with Noroozlo et al, (2019) who found that foliar application of Spirulina extract increase the chlorophyll content in the leaves of plant, especially when integrated with appropriate doses of N (50 and 75%) resulted in a higher content of a green pigment (13 and 16.5% more, respectively) in comparison with 100% of N (Yassen et al, 2018).…”

Cyanobacterial Biomass Produced in the Wastewater of the Dairy Industry and Its Evaluation in Anaerobic Co-Digestion with Cattle Manure for Enhanced Methane Production

“…The cultivation of this type of photosynthetic microorganisms in agro-industrial wastewater is presented as an exciting alternative to develop as tertiary wastewater treatments, avoiding the environmental impact that arises with the discharge of this type of sewage into bodies of water. Additionally, due to the elemental composition (C:N:P), presented by the biomass of A. platensis, it can be used as a biofertilizer or a biostimulant in agriculture [65][66][67].…”

Cyanobacteria: Review of Current Potentials and Applications

“…These findings proved the potential of algal extracts for application in future horticulture and agriculture. The products derived from Spirulina species could pave the way toward sustainable agriculture, thus ensuring food production to meet the demands of increasing population and environmental protection [35]. Cyanobacteria play an important role in the soil microbial community and help to restore the soil deterioration effect in biological ways [36].…”