CATDOLL : CATDOLL: How to farm white shrimps

1. How to breed white shrimp

Pond disinfection: Choose a pond of appropriate size, sprinkle quicklime and bleaching powder for disinfection, and then dry the pond for 1-2 days. Stocking shrimp fry: Select white shrimp with slender body segments and clean body surface, and the stocking density is 30,000-40,000 per mu. Regular pond inspection: Inspect the pond three times a day in the morning, evening and midnight, and turn on the aerator when the shrimp fry float to the surface. Feeding: Feed eggs, small fish and other baits.

How to farm white shrimp 1. Pond disinfection

When breeding white shrimp, you should choose a pond of appropriate size, sprinkle quicklime and bleaching powder on the bottom of the pond for disinfection, then expose the pond to the sun for 1-2 days to reduce bacteria, then inject clean water and apply organic fertilizer to cultivate bait.

2. Stocking shrimp fry

When stocking white shrimp, choose shrimp fry that are strong and lively, with slender body segments, uniform size and clean body surface. The stocking density in the pond is 30,000 to 40,000 shrimps per mu, and generally should not exceed 2,500 shrimps per meter. Too high a density will easily cause disease and death due to lack of oxygen.

3. Regular pond inspections

Patrol the pond three times a day, in the morning, evening and midnight, to observe changes in water color and whether the white shrimps are floating. Use light observation and net inspection to check the activity and growth of the white shrimps. If any abnormalities are found, adjust the amount of feed. If floating shrimps are found, turn on the aerator.

4. Feeding

Set up 3-4 feeding tables in the pond and feed the white shrimp 4 times a day in the first half month with eggs, small fish, etc. After half a month, gradually reduce the feeding frequency to 3 times a day. At this time, you can add fish meal, vegetable leaves and other foods.

2. Is it true that the online reports of indoor freshwater farming of whiteleg shrimp are true? Is it true that every 100 square meters of indoor farming can produce 200 kilograms of shrimp?

Tianqi is another name for Panax notoginseng. Panax notoginseng: First, it can only be harvested after three to seven years. Second, each plant has three petioles, each with seven leaves, hence the name Panax notoginseng. Li Shizhen: "It was originally called mountain lacquer, which means it can cure metal sores, like lacquer sticking to things. This is close to the truth. It is precious and worth more than gold." The root of Panax notoginseng, a plant of the Araliaceae family, is mainly produced in Yunnan. Therefore, it is called "Wen Sanqi". It has the effects of promoting blood circulation, removing blood stasis, stopping bleeding and relieving pain.

3. Is white shrimp freshwater or saltwater?

White shrimp are freshwater shrimp.

White shrimp is a species of shrimp that lives in warm and tropical coastal waters and freshwaters. Most of them have high economic value and live in brackish waters near shallow seas, coasts or estuaries. They are widely distributed in the Indo-Western Pacific region and are found in coastal areas and lakes in China.

White shrimp is also known as shaking shrimp, river bald shrimp, and spring shrimp. It is covered with a shell. The body is white and transparent with small blue or red spots. The shell is very thin but relatively hard. The shrimp body is slightly flattened and the shell ridges are slightly ridged.

Types of white shrimp:

1. White shrimp.

The white shrimp has a strong ability to adapt to the environment, grows and reproduces quickly, and its production along the coasts of the Yellow Sea and Bohai Sea is second only to Chinese hair shrimp and Chinese shrimp.

2. Beautiful white shrimp.

The species of white shrimp lives in pure freshwater and is distributed in waters north of China. The breeding season in eastern and northern China is from April to October.

3. White shrimp.

White shrimp Andersoni is only produced along the coast of China. It lives in brackish waters or pure fresh water near estuaries. Its breeding season is between summer and autumn. The production is not large. There are a certain number of them near the mouth of the Yangtze River, and they are mostly caught mixed with white shrimp.

4. Oriental white shrimp.

Oriental white shrimp is common in southeastern provinces of China and along the coasts of Japan and North Korea, but the production is not large.

The white shrimp of Vannamei should be judged as seawater or freshwater shrimp according to the breeding method. Most of them are seawater (saltwater) shrimp, and those bred in ponds with fresh water belong to freshwater shrimp. The white shrimp of Vannamei has thin shell and fat body, delicious meat, high meat content and rich nutrition. It is one of the three fine varieties with the highest breeding output in the world. 1. Regulating water quality Since the white shrimp of Vannamei is a seawater shrimp, it has particularly high requirements for algae in the pond water. Generally, the most suitable water color is yellow-green or yellow-brown formed by green algae or diatoms. These algae are benign biological communities in shrimp ponds and have the effect of fixing ammonia and nitrogen. It is often said that shrimp farming should manage a pond of water well. An important point is to take measures to adjust the water color to this color. The commonly used method on the market is to apply organic fertilizer, such as granular chicken manure 10-15 kg/mu.m. The suitable pH value for white shrimp is 7.8-8.5. If the pH value of the pond water is lower than 7.5, it is necessary to apply 1.5-2.5 kg of quicklime per mu.m. The number of days for application depends on the change of pH value. It is usually applied at 9-10 am on sunny days. After the white shrimp grows to 5 cm, in addition to using quicklime to adjust the water quality, it is best to apply photosynthetic bacteria to adjust the water quality and promote growth. However, in areas like East Taihu Lake, since the pond is generally acidic, quicklime must be sprinkled immediately after each rain, and photosynthetic bacteria must be added to adjust the pH value and improve the water quality. 2. Strict feeding Since the feed coefficient of white shrimp is relatively low, generally 1.5-2.0, the amount of feed should not be too much. Before the shrimp is less than 2 cm in length, if the basic feed (red worms) in the pond is not considered, the daily feed amount is 150 grams per 10,000 tails. As the shrimp grows gradually, the feeding amount will gradually increase, and the standard is that all the shrimp will be eaten within 2 hours after feeding. Feeding management should be relatively reasonable. It should be sufficient and good, and the breeding environment and cost saving should be taken into consideration. Generally, the following should be adhered to: 1. Feed frequently and in small amounts (no less than 4 times a day); 2. Feed more after dusk and before dawn; 3. Feed less when the water temperature is higher than 32℃ and the water quality is deteriorating; 4. Feed less on the day when the shrimps molt in large numbers, and feed more one day after molting; 5. Feed more appropriately when there are many competitive organisms (tadpoles) in the pond (this problem is more common this year). The amount of feed and the time should be flexibly controlled. Generally, there is more basic feed in the pond in the early stage of breeding, so less feed can be fed; in the middle stage, high-quality shrimp special feed should be fed; in the later stage, in order to promote growth, some crushed and cleaned fresh snails should be fed in appropriate amounts in Wujiang area to improve the problem of thin shell and light color in the process of seawater shrimp breeding. 3. Timely oxygenation For white shrimp, the dissolved oxygen requirement is relatively high, and the general breeding requirement is 3-5 mg/L, so special attention should be paid to the issue of oxygenation. Therefore, we advocate starting to turn on the aerator after the white shrimp is 3 cm long, and gradually increase the opening time from 2 hours a day. After the shrimp grows to 6 cm, it should be turned on for at least 10 hours a day, especially the 5 hours at noon on sunny days. Because our city is a freshwater aquaculture, if the water quality of the pond is not very bad, try not to change the water or change the water less, strengthen the feeding management, so that the photosynthetic bacteria can be regulated, and extend the opening time of the aerator. This not only improves the water quality, but also enhances the vitality of the white shrimp and improves the survival rate. This was well verified in East Taihu Lake last year. Of course, it is essential to equip every 5 mu with a 3KW aerator. In addition, in order to ensure the color of the white shrimp and improve the survival rate of transportation, it is best to apply some salt in the later stage to adjust the salinity. Fourth, disease prevention White shrimp (especially Brazilian varieties) has a strong disease resistance, but it does not mean that it will not get sick. Viral, bacterial and other nutritional and fungal diseases must be actively prevented and treated in time. For common problems such as tail rot, black gills, brown spots, and red legs, you only need to use common disinfectants. The focus here is on viral diseases. The main symptoms are that the shrimp are thin, their shells become soft, their body color becomes darker, their stomachs are not full,