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Planting techniques of rare vegetable hair lettuce
Hair Nourishment, also known as hair vegetable, algae, large hair, terrestrial hair, ear ear tendons, hairy vegetables, immortals, net pool hair, etc., for multi-cell algae for food. (I) Origin and Distribution Nostoc is a kind of low-algae plant and it is widely distributed in the world. It has Canada, the United States, Mexico, Morocco, Somalia, Algeria, France, Russia, and Mongolia. China has the most distribution in Ningxia, Gansu, Inner Mongolia, Xinjiang, Qinghai, Shaanxi and Hebei in the northwest. The Chinese food has a long history of consumption in China and was recorded as early as the Han Dynasty. (2) Nutritional value and uses The nutritional value of seaweed is very high. Each kg of seaweed contains 200–234.1 grams of protein, 570 grams of carbohydrates, 55.9 grams of crude fat, 450 milligrams of phosphorus, 25.6 grams of calcium, and 2 grams of iron. It also contains sea urchin ketone, cyano-lutein, cyanoblue, and allocyanin. The seaweed has a homonym with "get rich", which is loved by Hong Kong and Macao compatriots. In recent years, seaweed has also become a rare and delicacy favorite on the mainland. The seaweed can be fried, cold, and soupy. It can be made smooth, soft, tender, brittle, and smooth. It can be used as a delicacy dish. It is the first of a variety of vegetables with delicate fragrance, softness and freshness. The seaweed has a high medicinal value, its nature is flat, sweet and light, there is Pinggan Qianyang, the role of the bowel to stop phlegm. It can detoxify, detoxify, relive cough, cool blood, clear eyes, and facilitate urination. It can treat rickets, dysentery, high blood pressure, bronchitis, epistaxis, malnutrition and other diseases. Nostoc is a best-selling vegetable for the international market and is one of China's traditional export commodities. At present, domestic sales are insufficient and exports are in short supply. (3) Characteristic characteristics Nostoc species is algae species, Cyanophyta, Nostocaceae, Nostocaceae, and terrestrial algae. The Nostoc flagellum cells are filamentous, with no true nucleus, and the intermediate protoplasts are different from the surrounding and become a centrosome containing a pigmented plasmid. The hair vegetable plant is a non-branched or occasionally 2 to 3 branched filament, irregularly cylindrical or flat. The ends of a mycelia often become large in rods or sheets, blunt, curved, and intertwined with each other. When dried, the algae lost water and shrank and darkened, such as hair. When the humidity is high, the algae body is swollen and sticky and blue-green or brown. Nostoc plantlets can divide on their own, generally 20 to 30 centimeters long, a few up to 40 to 50 centimeters, 0.1 centimeter in diameter, 0.2 centimeters in flat, and a few 0.3 to 0.4 centimeters in size. The plant body is attached to the wasteland and grass and is composed of a solid, thick gelatine sheath surrounded by cells arranged in parallel. The cells are short or nearly round and 4 to 6 microns in diameter. The seaweed is very resistant to drought, high temperature, cold resistance, thin tolerance, strong adaptability, fear of long-term accumulation of water. The average annual temperature of 3 to 4°C is required, and there is almost no distribution in areas below 3°C. Tolerable extreme temperature 38 ~ 39 °C, extreme temperature -36 °C. The nourishment of seaweed is not strict with the soil, and it can be in infertile soils where higher plants cannot survive. The rock differentiation and growth on the saline-alkali soil requires more calcium for germination growth and development, and calcareous soil is the soil condition for the growth and distribution of the radish. The seaweed is at the lowest level in the plant community and can effectively use low-weak light. (four) cultivation techniques Site preparation is resistant to drought, but it grows well in a humid environment. Therefore, it is advisable to choose sandy soil or alkaline soil with good permeability. The soil should be fertile, made flat, covered with a layer of fine sand. 2. Plant a small section of 3 cm into the algae and one end is buried about 0.2 cm into the soil. The dense planting is 200-300 pieces/square meter. Nesting can also be used, ie, 0.1 to 0.3 grams of dried seaweed served as a litter and planted at a density of 25-30 litters per square meter. After sowing, it is covered with a layer of fine sand. 3. Water sprayed twice a day after management and harvest so as to keep the air moist. After 50 days of growth, the weight can be increased by 2.5 to 4.5 times. When the filaments grow into chunks, they can be harvested. Early spring and late autumn are harvesting seasons, harvesting early in the morning. The seaweed can be packaged and sold after it is washed, graded, and air-dried. (V) Development prospects The development of Chinese broccoli has high nutritional value. Its output is very low, and the consumption in developed countries is large, but it does not bother to cultivate. Therefore, there is a large gap in the international market. China is a traditional exporter of seaweed. However, due to the fact that it only collects or does not breed, wild resources have been destroyed. Since the 1980s, the export volume has declined year by year, and the quality has also declined. With the increase in domestic demand, especially the surge in demand for restaurants and hotels, the contradiction between the supply and demand of seaweed has become increasingly prominent. To this end, vigorously developing artificial cultivation of seaweed is a great thing for the benefit of the country and the people.