1. Selection of rice fields

Raising freshwater lobsters in rice fields is similar to intensive farming in ponds. The main thing is the choice of water source. The water source must be sufficient, not affected by droughts and floods, and have good water quality. Fresh, pollution-free rice fields with fertile soil, good water-holding properties and plenty of sunshine. However, you need to pay attention to the surrounding environment and do not choose farmland surrounded by pesticides.

2. Transformation of rice fields

Generally, in order to facilitate management and feeding, we divide the rice fields according to the existing drainage canals. Dig a deep ditch around the field ridge, usually a circulation buffer trench with a height of 50-60 cm and a width of 1 to 1.2 meters, and turn the excavated soil onto the field ridge, so that the embankment can reach a height of 1 to 1 meter. Left and right, about 80 cm wide. The inside is sloped like the pond. In addition, water inlets and outlets should be prepared according to the actual conditions, and anti-escape nets should be set up at the upper and lower inlets and drainage outlets.

In order to facilitate shallow irrigation, drying, application of chemical fertilizers, pesticides or fishing in rice fields, shrimp ditches and shrimp ponds must be dug in shrimp farming rice fields. The shrimp ditch can be dug after transplanting the rice seedlings. The method of digging should depend on the shape and size of the field and the direction of the drainage outlet. If the rice field is small, it can be opened in the shape of a "field"; if it is a long and large field, it can be opened in the shape of an inner "well" or an inner "field". The width and depth of the ditch are preferably 0.3 to 0.4 meters respectively. Shrimp ponds can be opened at the intersection of shrimp ditches or in fields

For shrimp farming in rice fields, inlets and drainage outlets must be opened. The location should be selected on the soil ridges at opposite corners of the rice field. During the breeding process, the inlets and drainage outlets should be opened. It can make the water flow smoothly in the entire rice field. Barriers should be installed at the inlet and outlet to prevent shrimps from escaping.

Xueyuan Lobster Breeding Base (Photo provided)

3. Shrimp stocking

Stocking time: Whether it is the current year's shrimp or the broodstock with eggs, They should be released earlier than in pond culture. Early release can not only extend the growth period of shrimp in the rice fields, but also make full use of the large amount of natural food resources cultivated after fertilizing the rice fields. The regular stocking time is from March to April in the first half of the year, or November in the second half of the year. If it is a two-season culture, brood shrimp can also be stocked around July to September in the summer.

Stocking density: 30 to 40 kilograms of egg-bearing broodstock per mu of rice field. You can also wait until March to April next year to stock the young shrimps. Note that the egg-bearing broodstock shrimps should be raised directly into the outer ditch to survive the winter. When the seedlings turn green, the shrimps will be lured into the rice fields to grow.

Xueyuan Lobster Breeding Base (Photo courtesy)

4. Feeding and Management

Paddy field feeding is similar to intensive pond feeding, as previously analyzed by the author It is very detailed. Friends who need to know more can click on the author's avatar to view the previously shared articles. Here are two points that need to be paid attention to in rice fields:

(1) Eliminate enemies: crayfish in rice fields There are still many enemies, such as water centipedes, snakes, water birds, eels, water rats, etc. In the early stages of stocking shrimp, the stems and leaves of the rice plants are not lush, and there are large gaps in the water surface of the field. At this time, the shrimp individuals are also small, have weak mobility, have poor ability to escape enemies, and are easily attacked by enemies. At the same time, freshwater lobsters need to shed their shells every once in a while to grow. When they are molting or just after molting, they are most likely to become palatable bait for enemies. At harvest time, due to the shallow drainage of field water, shrimps may crawl around, making the target bigger and easily preyed on by birds and animals. In this regard, it is necessary to strengthen field management and drive away enemies in a timely manner. In addition, when shrimps are stocked, domestic ducks must be prohibited from entering the ditches to avoid losses.

(2) Management of fields and ditches: After shrimp are stocked, managing the fields and ditches is very important. In the early stages of shrimp stocking, the field water should be shallow, but since the shrimp continue to grow and the heading, flowering, and filling of the rice require a lot of water, the field water can be gradually deepened to 12 to 15 cm to ensure that both (shrimp and rice) Water demand. At the same time, we are also paying attention to the changes in the water quality of the field ditches. Generally, new water is added every 3 to 5 days; in midsummer, new water is added every 1 to 2 days to keep the field water fresh. In addition, we should insist on patrolling the fields every day to observe the activities and feeding conditions of shrimps in the fields. If any abnormal phenomena are found, measures should be taken in time. In normal times, flood prevention, waterlogging and escape prevention work must be done, and weather changes should be paid attention to at all times. Once there is a heavy rainstorm, it is necessary to promptly check whether the inlet and outlet and shrimp trap equipment are intact to ensure safety and prevent shrimp escape.

5. Fishing

The time for shrimp farming in rice fields is generally when the rice is about to turn yellow, but there are also cases where the fields and ditches are filled with water after the rice is harvested, and then intensively raised for 1 to 2 days. Fished after several months. No matter when we fish, we can use ground cage fishing, or directly drain and fish completely. During the harvest season, when the temperature is high, harvesting can be done early or late to avoid damaging the shrimp.

Lobster (scientific name: Palinuridae) is the general name for species under the family Lobsteridae, the order Decapoda of the phylum Arthropoda. Also known as prawn, faucet shrimp, shrimp king, sea shrimp, etc. It has a thick cephalothorax, hard shell, colorful body, short abdomen, body length is generally between 20 and 40 centimeters, and weighs about 0.5 kilograms. Some parts of it have no chelae, and the abdominal limbs can evolve into chelae. The heaviest one can reach more than 5 kilograms, and is known as the lobster tiger. The body is thick cylindrical, slightly flat dorsally and ventrally, with well-developed cephalothorax, thick and spiny, and a pair of powerful supraocular spines in the center of the front edge with closed gill chambers. Mainly distributed in tropical waters, it is a valuable seafood. , the famous ones include Gaoyou Lake lobster, Shaobo lobster, Xuyi lobster, etc.

Lobster is the largest edible shrimp in the world. It is delicious and nutritious, and is very popular among people.

In September 2014, a hermaphrodite lobster appeared on Toshijima Island, Toba City, Mie Prefecture, Japan. The left half of its body is reddish brown and the right half is black.