Effect of Nitrogen and Different Light Spectra Dry Weight and Photosynthetic Pigment of Spirulina Algae

نوروزی زاده تیمورلویی, اعظم and آذرمی, رسول and اسماعیل پور, بهروز Effect of Nitrogen and Different Light Spectra Dry Weight and Photosynthetic Pigment of Spirulina Algae. In: 2nd International and 6th National Iranian Congress on Organic vs. Conventional Agriculture, August 2019, Ardabil, Iran.

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Abstract

Spirulina microalgae is cultivated e as food supplement for humans and animals feed due to nutrients such as minerals, antioxidants, proteins, essential amino acids and unsaturated fats. Nitrogen, as an essential element, plays an important role in the biomass productivity and its composition, and the quality of light can also affect its growth and biochemical composition. In this research, in order to study the different concentrations of nitrogen (0.3, 0.6 and 1.2 g L-1) and different light spectra (red, blue, red-blue and white light), an experiment was conducted as split plot based on completely randomized design in three replications at the University of Mohaghegh Ardabili. The results of this study showed that different concentrations of nitrogen and different light spectra, dry weight, chlorophyll a, chlorophyll b, carotenoid and phycocianine were significantly affected, so that the highest amount of these attributes was achieved in LEDs with red blue light. Increasing the concentration of the nitrogen caused an increase in the biomass production and the photosynthetic pigmentation of spirulina algae.

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