I. Overview

Spirulina is one of the oldest photosynthetic autotrophic microalgae, which belongs to lower plants and is named because its body is spiral under the microscope. This ancient marine life likes high temperature (25℃-36℃) and high alkali (ph9- 1 1). Many organisms and bacteria can hardly survive in this environment, but spirulina can grow and reproduce. In particular, it is not only the most abundant, comprehensive and balanced nutrition, but also a veritable nutrition champion on the earth, with high photosynthetic efficiency, strong adaptability, extremely short growth cycle, extremely fast reproduction, extremely high yield, excellent artificial breeding benefits and extremely broad prospects.

Spirulina is an alkaline nutritional health food, which can change the acidic constitution of human body into a healthy weak alkaline constitution and is easily absorbed by human body. More importantly, spirulina is rich in all kinds of nutrients necessary for human body, and its tissue is quite balanced, and some components are difficult for human body to obtain from other foods. In addition, scientists and medical authorities in the United States, Japan and Germany have repeatedly proved through scientific experience and many clinical cases that spirulina does have the role of prevention and adjuvant treatment for many diseases. Spirulina, as a pure natural nutritional health food, was rated as "2 1 century's best health care product for human beings" by the World Health Organization (who).

Spirulina is good, eating fresh spirulina is better! This technology is unique and creatively studies the family culture technology of spirulina, which has the characteristics of economy, good taste, pure quality, convenient operation, cleanliness and hygiene. Domestic spirulina integrates collective recreation, disease prevention, nutrition and health care; Self-support and self-use; Clean, safe and pollution-free.

Second, the ways and methods of spirulina home culture

1. culture containers: the main utensils are containers such as enamel washbasins, plastic pots and jars, and the ecological aquarium is the best. Aluminum pot and aluminum containers cannot be used. Spare a measuring cup, a red thermometer at 0℃-50℃, test paper with pH value of 7- 14, coarse nylon filter cloth (80- 100 mesh), fine nylon filter cloth (180-240 mesh), algae fishing filter spoon, water spoon, etc.

2, breeding conditions: first of all, the environment requires cleanliness and hygiene, not with pigs, cattle, sheep houses, chicken nests, etc. Secondly, the culture pots should be placed in places with sufficient light (sunlight or scattered light), such as balconies or roof platforms, courtyards and other places. Cement ponds can be built in sunny leisure land or abandoned land after mining in paddy fields, mining areas and saline-alkali land, and solar greenhouses or greenhouses are the best places to cultivate spirulina. Third, water quality conditions. Clean water must be used. The surface shallow water or deep well and tap water have a ph value of 7 and a salinity of 1g/L (tap water containing disinfectant cannot be used, and purified water can be used where there is no purified water). Dissolve the culture medium in measured clean water (drinking water) to become a nutrient solution, which can be added with algae seeds to start reproduction.

3. Breeding method of spirulina:

1) When you receive spirulina seeds, prepare a clean culture container that can hold about 30 liters of water and put it in a sunny and safe place in the room. Clean drinking water 10L, edible baking soda (sodium bicarbonate) (250g) in small bags, and one kilogram of urea.

2) Pour the nutrient solution medicine you received into the 10 liter of water prepared in the bag, stir to completely dissolve it, then add170g of sodium bicarbonate and 0.2g of urea, let it stand for about an hour after dissolution, and after clarification, take the supernatant and pour it into a culture container, and the nutrient solution is prepared.

3) Put the spirulina seeds into the nutrient solution of the culture container and stir with a water spoon to make the algae seeds evenly distributed in the nutrient solution. After about 5-7 days of growth and reproduction, the concentration of spirulina in the nutrient solution increased rapidly, from the initial light green to dark green, and the reproduction was successful.

Note: Newly propagated spirulina seeds are not dense in nutrient solution because they have just been sealed by mail or transportation, and are particularly sensitive to strong light. Therefore, it is necessary to gradually increase the light intensity, and shading management should be carried out a few days before the seeds swell, so that spirulina is not afraid of strong light after adaptation. Tap water containing disinfectants and toxic or polluted surface water shall not be used.

Observe whether the illumination of spirulina is too strong: if the spirulina seeds float evenly on the top of the nutrient solution, it means that the temperature and illumination are suitable. If spirulina sinks to the bottom alive, it means that the light is too strong and measures should be taken to avoid light.

4. Family agricultural technology

1) Spirulina must grow under specific conditions. The ph value of the culture solution (called pH value) is controlled between 8.5- 1 1.5. After adding algae seeds, the culture medium is light green. The optimum temperature of spirulina growth solution should be 20℃-38℃, and its limit growth temperature is 40℃-65438 05℃. Practice has proved that spirulina organisms will not freeze to death and have strong viability.

2) Daily management of spirulina culture: Stirring is one of the effective ways to increase the yield of spirulina. Stirring the nutrient solution of spirulina culture with a spoon regularly every day can obviously improve the yield of spirulina.

3)ph adjustment and nutritional supplement: for every 65,438+00 liters of nutrient solution cultivated by spirulina, 5g of sodium bicarbonate and 0.3g of urea are added every other day. Dissolve the above two drugs in an appropriate amount of water (the amount of water is the natural consumption of the nutrient solution for two days), and then add them into the spirulina nutrient solution. Add a bag of nutrient solution medicine to you every month.

4) The culture container should be cleaned once a week, and the clarified sediment in the nutrient solution should be discarded.

5) Harvesting: when the color of the culture solution in the culture basin (pool) is light green to dark green and there is a thick dark green paint layer on the liquid surface, it can be harvested. 180-240 mesh nylon gauze can be tied to a colander for filtration, and surface collection filtration method or all-liquid filtration method can be adopted. When filtering, spirulina stays on the filter cloth, which is called concentrated algae liquid, and dehydrated spirulina is called algae mud.

6) storage, processing and eating: after the algae mud is collected, it is put into 240 mesh nylon gauze and washed repeatedly with clean drinking water, and the ph value is measured to be 7. Drain the water, put it in the refrigerator and store it at 0℃-5℃. Or spray drying, oven drying, sun drying, processing into various foods, or directly eating.

Fresh spirulina is beautiful dark green or blue-green, without any peculiar smell, and it is very easy to drink. Spirulina is quickly absorbed by the human body after drinking, and the body will feel energy within a few minutes. Spirulina can be mixed with milk, juice, honey, porridge or soup to make various drinks for direct drinking, and can also be added to staple foods such as steamed bread and rice, which can not only provide nutrition, but also add a green flavor; Can also be added into cold dishes and hot dishes as seasoning; People with special tastes can also add fresh spirulina to seasonings such as Chili sauce, sweet noodle sauce and soy sauce. You can also make a beauty mask, which has the effect of wrinkle removal and whitening, so that you are "only young and have no acne".