Out-of-season lobster culture technique

Culture pond: select the pond that is sunny and leeward, dig several strip ditches of the same specification in the pond, clean the bottom of the pond, filter and release water, plant water hyacinth and other water plants, and finally install a microporous oxygen-increasing pipe in the strip ditch. Scaffolding: the scaffolding needs to be covered with two layers of thick plastic film. Release seedlings: seedlings can be released in the middle and last ten days of November, and about 50 kilograms of semi-commercial shrimp can be put in per mu. Feed: feed once a day and make sure the amount of dissolved oxygen in the water is sufficient.

Lobsters begin to live in caves when the water temperature is lower than 12 ℃, and no longer come out to hunt for food. at this time, lobsters are very difficult to catch, and the market will be in short supply, so mastering the technology of out-of-season lobster culture can obtain good economic benefits.

First, select culture ponds

The breeding place can choose to be in the sunny leeward pond, generally showing east-west rectangle, during the period of entry and drainage should be convenient, the soil quality can choose slightly hard loess, the pond can plant a small amount of aquatic plants.

II. Construction of aquaculture ponds

1. Digging several strip trenches of the same specification in the pond needs to be rectangular from east to west, the ridge should be higher than the surface of the water 50cm, the width of the top of the ridge is 40cm, the width and length of the strip ditch is 5m, the length is 40m, the depth of the ditch is 50cm, and the slope ratio is 1RO 1.2.

2. The bottom of the pond needs to flatten and remove the silt, apply fertilizer after filtering into the water, plant water plants such as water peanuts, Eloe algae, water hyacinth, and finally install a microporous oxygen-increasing pipe in the strip ditch, which is beneficial to increase oxygen.

3. Installation of scaffolding

The main results are as follows: 1. The bamboo to be bound in the shed is cut with a knife, and then inserted into the two sides of the ditch with a distance of 2m. The bamboo on both sides is bent and fastened with adhesive tape to form an arch, and the crossbeam is mounted on the arch bamboo. Then fasten it with tape to enhance the firmness of the arch.

2. In the center of the strip ditch from east to west, bamboo is used for piling and laying bamboo board road, which is convenient for baiting in the shed in the later stage. The bamboo board road should be 10cm above the water surface, and then covered with two layers of thick plastic film on the scaffolding, which is beneficial to heat preservation. During this period, both ends of the strip ditch can be surrounded by plastic film, leaving a small door for easy access.

IV. Stocking prawns

After all the preparatory work of the culture pond has been done, 40-50 shrimp / kg of semi-commercial shrimp can be released on November 20, and 50kg can be put in each mu. Before stocking, the aquaculture pond can be disinfected with 3% Mor 5% salt water, and then evenly placed on the aquatic plants of the culture pond along the strip ditch.

V. Investment and feeding management

1. In November, due to the weakening of the light intensity and the gradual decrease of the air temperature, the water temperature in the greenhouse also began to decrease. During this period, the bait can be fed once a day, and the feeding rate is 3%. The feeding rate is 4%, and you can choose to feed it when the temperature is relatively high at noon. The management method is the same as the normal culture management.

2. However, the greenhouse is closed tightly, so it is easy to cause hypoxia in the water body. During this period, a microporous aerator is often activated to increase oxygen in order to ensure that there is sufficient dissolved oxygen in the water body in the greenhouse, and at noon when the weather is clear, it is also necessary to open the small doors at both ends of the greenhouse for ventilation, which is helpful to enhance the oxygen content in the greenhouse.

3. When there is no light at night, a layer of grass curtain can be covered above the greenhouse, which is helpful to enhance the temperature in the shed. Due to the closed feeding, the flow of water in the shed is less, so it is easy to cause the water quality to deteriorate. During this period, biological agents can be used to regulate water quality.

VI. Fishing and sale

Before the Spring Festival, the market situation of lobsters will be better. When lobsters with large sizes are caught and sold, the average yield per mu can be as high as 80kg, the output value per mu can reach about 5600 yuan, and the net benefit of 20 mu pond is about 64000 yuan.