Cultivation and processing technology of alfalfa laver in autumn
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First, alpine Laver autumn seedlings porphyra seedlings cultivated to mature in early September, mature good seed, shell surface color from the original fresh laver color into a slightly yellowish or brownish brown, look obliquely in the sun, A layer of tan "flee" can be seen. If shells are hung under the sea for one night and the seedlings are stimulated in the seawater, they can concentrate and disperse another kind of seeds, shell spores. If the temperature of the seawater has stabilized below 28°C at this time, the second picking can be carried out, that is, the autumn picking. Before harvesting seedlings, they should be immersed in sea water or fresh water for 1 month with the seedlings curtain (the bamboo curtains or vinylon curtains attached to the seedlings) in advance. When collecting seedlings, the shells of the filaments must be packed with net bags or bamboo baskets at 4 o'clock in the morning. Hanging in the natural sea area stimulates the flow of water for 1 night, and it is taken out in the early hours of the next morning. According to the standard of using 600 to 800 shells for 1 mu (40 curtains of 180 square meters) laver, the bamboo curtain or Vinylon curtain is divided into several piles on the bottom of the pool, and the distance between the piles is 15 cm to 30 cm, and then The concave surface of the shell is evenly distributed in the seedling curtains on each layer, and the edge of the shell is drained until the top curtain is submerged. Then use the water pump or manual stirring method to keep the water flowing continuously. After stirring for 1 hour and stopping for 20 minutes, the spores can be evenly attached to the attached seedlings. Stop stirring until 12 noon, let it stand until 3 pm, then remove the curtain and hang it under the sea. After 9 to 13 days under the sea, small seaweed grows with the naked eye. Second, the management of seaweed cultivation period 1. Daily management: mainly to ensure that the curtains, frames, piles safe and secure, keep the screen flat, wash sedimentary sludge, remove the algae. 2. Prevention of diseases and predators: The most common predators during the growing season of seaweed are diatoms and green algae. Can be used to remove the sun exposure, drying time depending on the size of the laver. Small seaweed exposure time should not be too long, suitable for 1 day; large seaweed can be dried in 2 days. Note that in the case of the south wind, it is not suitable for drying. A large area of ​​rotten vegetables is mainly to prevent, and the causes and treatment measures have yet to be studied. Early symptoms were found in the culture (the algae were soft, dark in color, and not adhered firmly), which could be used to reduce the loss by raising the tide level of the breeding, drying the curtain, and promptly catching or removing the curtain to avoid the rotten vegetables during the short-term shade in the room. 3. Harvesting and Processing 1. Harvesting: Forty days after planting, seaweed can be harvested for the first time. There are two types of harvesting methods. First, dry seaweed harvests the seaweed. The harvester takes the "mud horse" or applies it on foot; the other is the full tide, and uses two pods to form a group and stands on the shelf. On both sides, take a springboard and the harvester picks up on the springboard. This method is convenient and safe. Before the harvest of seaweed, net curtains should be washed first to reduce the sediment content and improve the quality of seaweed. Every 10 days to 15 days can be harvested once. There are two methods of harvesting, crop harvesting and harvesting. 2. Processing: The harvested seaweed is rinsed with fresh water, chopped or directly placed on a small round sieve or large bamboo curtain, and then placed in the sink to flatten, drain water, and dried in the sun .