CATDOLL : CATDOLL: How to grow purple moss without making it bitter

How to grow purple moss without making it bitter

Nori is a type of seaweed that usually grows on rocks in intertidal zones. It is rich in nutrients and is a very popular food. If cultivated nori tastes bitter, there may be several reasons:

Insufficient light: Porphyra needs a lot of sunlight to photosynthesize, and lack of light will cause the porphyra to become bitter.

Water temperature is too high: Water temperature that is too high will affect the taste and texture of seaweed and make it bitter. The most suitable water temperature should be around 15℃.

Poor water quality: Nori requires high-quality water to grow, otherwise it will absorb harmful substances and affect the taste.

Therefore, in order to grow seaweed that is not bitter, you need to pay attention to the following points:

Choose a suitable planting location: Nori prefers an environment with plenty of sunlight and moderate water temperature. You can choose to plant it by the sea or in freshwater areas.

Ensure water quality is good: Use purified water or processed fresh water, and test the water quality regularly.

Control temperature: In hot weather, you can use a shade net to control the water temperature of the laver and ensure that the water temperature is within the appropriate range.

Good management: clean up weeds and other pollutants in time, and add appropriate amounts of nutrients to promote the growth of laver.

With the above measures, you should be able to grow delicious, healthy nori.

Does anyone know which algae are sensitive to water quality and temperature? Thank you

Phaeodactylum tricornutum Bohlin

It is classified into the phylum Bacillariophyta, class Pinnata, orders Phaeophyceales, and genus Phaeophyceales.

1. Morphological characteristics: Triangular brown finger algae has three different forms: oval, fusiform, and triangular radial. These three forms can be transformed under different environmental conditions. For example, under normal liquid culture conditions, there are mostly triangular radial cells and a small number of fusiform cells. Both forms do not have siliceous cell walls. The length of the triangular radial cell is about 10D18 microns (vertical distance between the two arms). There is a nucleus in the center of the cell and 1D3 yellow-brown chromatophores. The fusiform cell is 20 microns long, and the ends of the two arms are blunt. The oval cell is 8 microns long and 3 microns wide, with a siliceous shell surface, lacking another shell surface, and no shell ring. See figure:

2. Reproduction method: The reproduction of P. triangularis is generally through parallel division into two cells of the same shape. Because the cells have no siliceous shell, the algae will not shrink during fission, unlike ordinary diatoms.

3. Ecological conditions:

Salinity: The adaptability of the triangular brown finger algae to salinity is very wide. It can survive in the range of 9D92, and the optimum salinity is 25D32.

Temperature: The suitable temperature range is 5--25℃, and the optimum temperature is 10--20℃. Even at 0℃, it still reproduces, but it stops growing when it exceeds 25℃, and eventually dies in large numbers.

Lighting: The suitable light intensity is 1000D8000 lux, the optimum range is 3000D5000 lux, and direct sunlight should be avoided in small-scale cultivation. Yichun High-tech Patented Product Development Center provides photosynthetic bacteria culture medium and a complete set of culture formula technology.

pH: It has a wide adaptability range and can grow and reproduce in an environment of pH 7D10. The optimal range is between pH 7.5D8.5.

Platymonus spp. has strong adaptability and rapid growth and reproduction. It is an excellent food for many shellfish larvae (especially postlarvae). Platymonus belongs to Chlorophyta, Chlorophyceae, Volvoxales, Chlamydomonas, and Platymonas. Common species include Qingdao giant platymonas and subcordiform platymonas.

1. Morphological characteristics:

The algae of Subcordiformis are generally flattened. The cells are broadly oval in front view, with a wider front end and a concave front top. Four flagella grow from the depression. There is a large, cup-shaped, green chromatophore in the cell. There is a cup-shaped pyrenoid with an inward opening near the rear end. There are one or more red eyespots that are relatively stable near the pyrenoid. There is a nucleus in the protoplasm outside the chromatophore slightly in front of the middle of the cell. There is a relatively thin fibrous cell wall outside the cell. The cell is between 11D16 microns long, generally 11D14 microns long, 7D9 microns wide, and 3D5 microns thick. It moves by flagella and swims quickly and lively in the water.

Qingdao Megaphytes is 16D30 microns long, usually 20D24 microns, 12D15 microns wide, 7D10 microns thick, and has a bilaterally symmetrical body shape. Under normal living conditions, when the division is fast, it has a slight dorsal and ventral distinction, with a bulge in the back and a slightly concave abdomen. The tail is slightly narrow or slightly pointed. There are 2D3 eye spots, and a few have 4.

2. Reproduction method:

Asexual reproduction, the cell divides longitudinally to form 2, in a few cases 4 daughter cells, when the environment is unfavorable, dormant spores are formed.

3. Ecological conditions:

① Salinity: Subcordiform algae have a wide range of adaptability to salinity and can grow and reproduce in water with salinity of 8D80. The most adaptable salinity range is between 30D40.

② Temperature: Subcordiformes has a wide range of adaptability to temperature and can grow and reproduce in the range of 7--30℃, with the optimum range being between 20--28℃.

③ Light: Subcordiformis can grow and reproduce in the light intensity range of 1000D20000 lux, and the optimum light intensity is about 5000D10000 lux.

④ pH: Generally, they can grow and reproduce in the pH range of 6-9, and the optimum range is about pH 7.5-8.5. Chlorophyta species grow well in water rich in organic matter.

Laver

A general term for Porphyra of the genus Porphyra in the class Protoflorideophy-ceae, order Bangiales, family Bangiaceae, phylum Rhodophyta. Porphyra contains up to 29-35% protein, as well as iodine, multiple vitamins and inorganic salts. It is delicious and can be used to treat goiter and lower cholesterol in addition to being eaten. It is an important economic seaweed. It is widely distributed throughout the world, but mainly in temperate zones. About 70 species have been discovered. The number of naturally grown Porphyra is limited, and the output mainly comes from artificial cultivation. Porphyra haitanensis, Porphyra yezoensis and Porphyra tenera are the main cultivated species.

Porphyra thallus mostly grows in intertidal zones, preferring sea areas with strong winds and waves, smooth tides, and rich nutrients. It is highly drought-resistant; the suitable light intensity is 5000-6000 lux, with the characteristics of high light saturation point and low light compensation point, and is a high-yield crop. The adaptability to low temperatures varies with the water content of the algae. When it is quickly dried to 20% water content, it can be restored to vitality after being refrigerated at a low temperature of about -20℃ for several months to 1 year and put back into seawater. The adaptability to the specific gravity of seawater is wide, but 1.020-1.025 is appropriate. The filaments have poor drought resistance and require low light, so they are naturally distributed below the low tide line. When the temperature begins to drop and there is seawater flow, the conchospores are often released in large quantities from 9 to 11 am every day after formation, showing obvious daily periodicity.