Qingwei White Shrimp Cultivation Technique in Autumn

Blue-tailed white-tailed shrimp is a kind of important economic shrimp in China. Its delicious meat and rich nutrition can be processed into dried products in addition to fresh food. In the autumn and winter of shrimp ponds, white-tailed shrimps are cultured, that is, after the second-long-tailed shrimps are harvested, white-seedlings are harvested from the seedlings or broodstock by self-cultivation and raised to live for sale before and after the Spring Festival. With the characteristics of low cost, short cycle, easy management, and high profitability, in recent years, this method has been commonly used in the county's postal stations and snake-distribution shrimp ponds, and good results have been achieved. The yield is as high as 30 kilograms, and the benefits are very high. 1500 yuan. White shrimp breeding in autumn and winter is conducive to improving the utilization of shrimp ponds, so that the winter shrimp ponds can fully play the benefits. It is worth promoting everywhere.

First, the biological characteristics of white shrimp

1. Habitat habits.

The white-tailed white shrimp lives in the shallow sea near the shore and has strong adaptability to the environment. The suitable temperature range is 2°C-39°C, and the water temperature can also survive at -3°C; the salinity of 3.87-30 can be adapted to the range. The brackish water grows fastest. Poor tolerance to hypoxia, less than 1mg/L, will die due to lack of oxygen.

2. Diet and growth.

The tail-tailed white shrimp has a wide range of dietary habits and can feed on both animal and plant foods, but especially eats fresh fish, shrimp, and shellfish. Shorter growth cycle, 2-3 months can grow into commercial shrimp.

3. Breeding habits.

The white-tailed white prawn has a high fertility, and it is almost always held egg-bearing shrimp. Reproduction usually occurs in the spring. In summer and autumn, it can be propagated 10 times a year.

Second, the spine shrimp shrimp pond breeding technology

1. shrimp pond conditions.

General shrimp ponds can be cultured, but especially in the bottom of the harbor, the sea water salinity is low, and shrimp ponds rich in natural white shrimp resources in the nearby sea area are the best.

2. Leave white shrimp seedlings.

Different methods can be adopted according to different situations. (l) When the long-haired prawn is harvested from the late July to the middle of August in the lunar calendar, white prawn seedlings should not be more than 2 cm in length, and the white prawn should be left in the pond. When shrimps are generally put, long-haired prawn first exits, and finally a large number of white larval seedlings emerge. In this case, they need to be closed in time, and shrimps are repeatedly put in shrimps. The shrimps can be released and the white shrimp can be retained. Seedlings; (2) pay close attention to the situation of white shrimp seedlings in the sea area. When the last shrimp seedlings emerged, the flow nets were used to fill the water-dense nets into the white shrimp seedlings. (3) Take the method of breeding white shrimp seedlings with fertilizer to increase the density of shrimp seedlings in the tower. After the last batch of white shrimps in the pond held eggs in early August of the lunar month, they stopped draining and increased the density of algae in the tower by fertilizing the baits, so that the white shrimps had sufficient food after hatching, which greatly improved the survival rate of the shrimp seedlings. If there are not enough eggs in the pond, they can be caught from the sea. In general, the amount of mu is 150-200. The combination of the above three methods can achieve better results.

3. Feed the bait.

Adhere to feeding every day, shrimp can be used with food, fresh shrimp feed, can also be used Maiji, No. 4 powder, etc., depending on the density of shrimp within the tower, the size of the shrimp and eating conditions determine the amount of feeding. In the early period, it gradually increased in the middle period, and later, as the water temperature decreased, the amount of feeding was reduced or basically not cast. Normally, 0.5-1 kg of dry bait is fed per acre, and the water temperature in winter falls below 5°C. White shrimp are no longer eating, and feeding is stopped at this time.

4. Clear the enemy.

Since the second pupae of long-haired prawn have not cleared the pond after harvest, and naming will inevitably lead to enemy pests, they must use 15W in the early stage of breeding. The essay talks about the clearing of the pond.

5. Water quality management.

Every time there is a large tide, the water will enter and drain once and change the water volume by 10-20% to promote the peeling of white shrimp. If the water quality in the pond is poor, the water exchange volume must be increased.

6. patrol pond inspection.

The patrol pond should pay attention to observation of shrimp feeding, growth, water color, embankments, inlet and outlet gates, gate nets, etc., and encounter adverse weather conditions. In particular, it is necessary to observe and take timely measures to ensure the safety of shrimp ponds and the healthy growth of white shrimp.

7. Collect in time.

Before and after the Spring Festival, the body length of white shrimp has grown to 5-6cm, and the market price is the highest. It can be listed and sold fresh.

Peeled Onions

Peeled Onions,Fresh Peeled Onions,Peeled Fresh Red Onion,Fresh Yellow Onion Peeled

Yirun Agricultural Cooperative , https://www.yiruncn.com