CATDOLL : CATDOLL: Where is the hometown of seaweed?

1. Where is the hometown of seaweed?

Cangnan County, the hometown of Chinese laver, is located in the southeast coast of Zhejiang Province. It is rich in laver, with a breeding area of ​​26,000 mu and an annual output of 4,000 tons of dried laver, with an output value of nearly 100 million yuan. It is distributed in six coastal towns of Yanpu, Xiaguan, Chixi, Longsha, Zhongdun and Dayu. In February 2001, it was named "the hometown of laver" by the Zhejiang Provincial Ocean and Fisheries Bureau. The "Yingchun" brand, "Hongfeng" brand and the "Levi" brand, which is being registered, are made of laver raw materials produced by the provincial high-quality and high-efficiency park in Yanpu Bay. They are processed by scientific methods and do not use any chemical pesticides, fertilizers or additives. They are safe and convenient to eat. The "Yingchun" brand laver won the silver medal at the Zhejiang Fishery Expo in 2001 and the gold medal at the Zhejiang Agricultural Expo in 2002. The laver production base in Yanpu Town was awarded the title of Wenzhou City's safe agricultural products in 2002. The health care effect of laver is very obvious. Laver has an inhibitory effect on certain cancers, especially colon cancer and breast cancer. "Compendium of Materia Medica" records that "Laver can cure heat, gall and lumps". Because eating laver regularly is very effective in preventing and treating goiter, chronic tracheitis, cough, anemia, night blindness, scalp itching, gastric ulcer, lowering cholesterol, high blood pressure and anti-aging.

Xiapu County belongs to the eastern area of ​​Fujian Province, Fujian Province, located in the northwest coast of the Taiwan Strait and the northeast of Fujian Province. It has a land area of ​​1,489.6 square kilometers and a sea area of ​​29,592.6 square kilometers. It is a port city in the northeast wing of the Strait West Coast Economic Zone on the southeast coast of China. It is a coastal economic opening county approved by the State Council of the People's Republic of China, the earliest open port for trade with Taiwan in Fujian, a famous domestic tidal flat photography base, the "Hometown of Chinese Kelp" and the "Hometown of Chinese Laver", and is known as the "Key Point of Fujian and Zhejiang", "Hometown of Fish and Rice", and "Zou Lu on the Seaside".

A Bite of China has achieved this

Lianyungang, Jiangsu, produces more than 90% of the country's laver, especially 85% of which is exported to South Korea and Japan

Xiapu County has nothing to do with Cangnan

2. Where does laver grow?

Wild laver grows on rocks near the sea. Farmed laver grows on artificial nets and ropes. Laver does not grow all along the sea, and different species live in different seas. The two species with the largest farming volume in my country are Porphyra yezoensis and Porphyra truncatula. Porphyra yezoensis lives in the sea north of the Yangtze River estuary and south of Lianyungang. Porphyra truncatula is produced in the coastal areas of Fujian and Zhejiang, and its economic and nutritional value is far inferior to that of Porphyra yezoensis.

Haha, just ask me this question.

You don't live by the sea, do you? Children who live by the sea know that

Seaweed grows on rocks, it is slippery and you have to be careful not to scatter it when picking it.

Usually use a sharp stone to scrape it.

I hope you will accept my suggestion of pure manual typing.

It is distributed in both the northern and southern hemispheres and grows at the high tide line of the intertidal zone. It grows best in nitrogen-rich water (such as near the outlet of sewage pipes). It can be harvested and dried for food

Sea, marine life

Helijia Land-based

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3. The growth environment of kelp and laver is ()

Laver farming has high requirements for the environment. Choosing a good laver growing environment plays a key role in the yield and quality of laver. In general, we should pay attention to the following four aspects

1. Bottom quality - Bottom quality is a factor that affects the growth of laver, but it is related to the setting of floating rafts. Semi-floating rafts can only be used in the bottom quality that is suitable for piling and rafting, and is not easy to damage these equipment, such as sandy, muddy, and even muddy and gravel bottoms. There are two disadvantages of too soft bottom quality. One is that it is inconvenient to move when it is low tide. In addition, the water quality of muddy bottom is turbid after high tide, and there is a lot of mud on the net and algae proliferate, which has a certain impact on the emergence of seedlings. When choosing the sea area, muddy bottom quality is more suitable. Rocky reef bottom quality is not easy to pile and set up raft equipment, and has not yet been used for artificial cultivation. The full floating raft type can be used in the same sea area as kelp cultivation.

2. Tide level - Porphyra yezoensis and Porphyra haitanensis are both seaweeds that grow in the intertidal zone under natural conditions. Different tide levels will result in significant differences in their emergence, growth and yield. Therefore, when setting up a raft, the height of the tide level is an important parameter. According to the natural distribution of Porphyra yezoensis and Porphyra haitanensis, the most suitable tide level is the tidal zone with a dry exposure of 2 hours and 30 minutes to 4 hours and 30 minutes during high tide. In theory, the tide level for cultivating Porphyra yezoensis is lower than that for Porphyra haitanensis because of its poor drought tolerance. However, our city's practice has proved that Porphyra yezoensis can be cultivated in the mid-tidal zone where Porphyra haitanensis can be cultivated. If the tide level is too low, it is easy to attach algae and silt to the net curtain, which will affect the growth and yield of Porphyra.

3. Seawater flow - If the seawater flows well, the laver grows fast, has a long growth period, high yield, and is not easy for diatoms to attach, so the laver has good quality; if the seawater flows poorly, the laver thallus is easily attached by diatoms, and the thallus ages prematurely, thus affecting the yield and quality. It is generally believed that the flow rate is 10-30 cm/minute. The suitable flow rate for the growth of laver is 20 cm/minute. The east and north sea areas are generally better than the south sea area and the inner harbor area because of their strong winds and waves and fast water exchange.

4. Nutrients - In the southern sea areas, the seawater is now generally eutrophicated, and the nutrient index is no longer an important reference factor for laver cultivation. However, according to numerous practices, laver grows better in sea areas with an appropriate amount of fresh water inflow. But for those sea areas with intensive laver cultivation, there is still a possibility of fertilizer deficiency during the season when laver grows vigorously.

ocean

4. Is green or purple laver better?

The green ones are better than the purple ones. The green ones are new, and the purple ones are older.

1. Introduction of Laver:

Porphyra is a general term for the symbiotic algae in the sea. It belongs to the class Rhodophyceae and the family Rhodophyceae. The algae are membrane-like, called thallus. They are purple or brownish green. The shape varies with the species. Porphyra is a marine red algae.

The thallus is composed of a layer of cells embedded in a thin layer of colloid, and is dark brown, red or purple. The holdfast is disc-shaped and the rhizoids are thread-like. It grows on rocks in the intertidal zone of shallow seas. There are many species, mainly Porphyra yezoensis, Porphyra haitanensis, Porphyra gansuensis, etc.

Artificial cultivation has been carried out in coastal areas of China. At the beginning of the 21st century, China's laver production ranked first in the world. It is rich in protein, iodine, phosphorus, calcium, etc. It can be used for food and medicine [20].

At the same time, laver can also be used as medicine and made into Chinese medicine, which has the effects of resolving phlegm and softening hard masses, clearing away heat and promoting diuresis, and nourishing the kidney and heart. Laver is often mistaken for a plant because it can photosynthesize; but biologists generally believe that it is not a true plant because it does not have true duct tissue (xylem and phloem), unlike seagrass. In addition, several cyanobacteria are related to seaweed. Large seaweed mostly grows in cold areas. Artificially cultivated species include Laver yezoensis and Laver haitanensis.

2. Nutritional value of seaweed:

Porphyra is the algae of many wild species of Porphyra haitanensis TJ.chang et BF.Zheng, Porphyra yezoensisUeda, Porphyra suborbiculata Kjellm., Porphyra tenera Kjellm., etc. The algae are purple and generally 12-30 cm high.

The cultivated Porphyra haitanensis is mainly distributed in the coastal areas of Zhejiang and Fujian; the cultivated Porphyra yezoensis is distributed in a smaller area, mainly in Nantong and Lianyungang cities along the coast of Jiangsu Province.

The edible leaf-shaped algae of the genus Porphyra. Porphyra is rich in nutrition, with a higher protein content than kelp, and contains more carotene and riboflavin. Every 100g of dried Porphyra contains 24-28g of protein, 0.9g of fat, 31-50g of carbohydrates, 330mg of calcium, 440mg of phosphorus, 32mg of iron, 1.23mg of carotene, 2.07mg of riboflavin, 5.1mg of niacin, 3.4g of alanine, 3.2g of glutamic acid, 2.4g of glycine, 2.6g of leucine, and 1.4g of isoleucine. The content of protein, iron, phosphorus, calcium, riboflavin, and carotene ranks first among all vegetables, so Porphyra is also known as the "treasure house of nutrition".

Many people think that green laver is of better quality. This is a misunderstanding, which is caused by not knowing the processing method of laver. If laver is dried, the phycoerythrin is destroyed, so it will still be green when soaked in water. If laver is sun-dried, the phycoerythrin is not destroyed, and the water will turn purple after soaking in water. Because in addition to phycoerythrin, many nutrients in dried laver will be destroyed. In fact, laver that turns purple after soaking in water is more nutritious. The same is true for mushrooms. Shiitake mushrooms processed by sun-drying are more nutritious. The content of vitamin D in sun-dried mushrooms is higher. However, the dried shiitake mushrooms seen on the market are not sun-dried, but dried, so they do not contain much vitamin D. It is best to buy raw shiitake mushrooms and dry them yourself. In fact, most dried goods are dried, not sun-dried. Why are most side dishes dried, not sun-dried?