Method for cultivating spirulina platensis at high yield in northern region

Abstract

The invention discloses a method for cultivating spirulina platensis at high yield in northern region. The method includes the following steps that a pond body is constructed in a greenhouse to serve as a cultivation pond, wherein the length of the cultivation pond is 110 m, the width of the cultivation pond is 6 m, and the depth of the cultivation pond is 0.5 m; water and cultivation culture materials are thrown into the cultivation pond according to the water amount of 330 tons, and therefore the concentration of the cultivation culture materials is that sodium bicarbonate is 3.8-4.1 g / L, sodium nitrate is 0.9-1.2 g / L, phosphoric acid is 0.08-0.1 g / L, potassium chloride is 0.28-0.3 g / L, magnesium sulfate is 0.045-0.052 g / L, and ferrous sulfate is 0.008-0.01g / L; filtered algae species are connected into the cultivation pond directly for large-pond cultivation, and when optical density (OD) value of spirulina platensis liquor reaches 0.6 or above, harvesting is performed. With the method, the spirulina platensis can stably grow up, and the high yield of spirulina platensis can be achieved under the condition that the cultivation raw materials are saved.

Description

technical field [0001] The invention belongs to the technical field of aquatic plant cultivation, in particular to a high-yield cultivation method for spirulina in the northern region. Background technique [0002] Spirulina is a single-celled aquatic plant belonging to the phylum Cyanophyta, the order Segleroides, and the genus Spirulina. The plant body is a unicellular filament without a glue sheath. The cells in the group are cylindrical, composed of loose or compact regular helical curved filaments. The top of the cells or filaments is not tapered, the transverse wall is not obvious, the top cells are round, and the outer wall is not thickened. There are more than 30 species of Spirulina, most of which live in freshwater lakes, and a few live in saltwater lakes. [0003] Spirulina, like other plants, can use sunlight, carbon dioxide and other minerals to synthesize organic matter and release oxygen at the same time. Spirulina has high light efficiency and timeliness,...

AI Technical Summary

Problems solved by technology

Our northern region, especially Inner Mongolia, has more than 3,000 hours of sunshine per year, which is comparable to that of Tibet, and the light intensity is high, which is especially suitable for breeding spirulina. However, due to the influence of light intensity and temperature difference, the current breeding technology is not suitable for breeding in northern regions. Spirulina, due to the unreasonable design of the culture pond, which affects the photosynthesis of spirulina, resulting in low yield, unreasonable feeding not only increases the production cost but also reduces the utilization rate of the culture material, resulting in serious waste