CATDOLL : CATDOLL: How to cultivate shrimps in rice fields?

When you think of shrimp farming, you will think of it in the sea or in a pond. Do you know how to farm shrimp in rice fields? Let me introduce it to you below, I hope it will be helpful to you.

Farming shrimp in rice fields

1. Choose a good field and dig a good shrimp ditch

The rice fields for shrimp farming require fresh water and stable water levels. To this end, we should choose fields close to water sources, with convenient water inlet and outlet and good soil quality. After turning and leveling, we can dig shrimp ditches 2 meters wide and 1 meter deep at one end of the field, or dig shrimp ditches 1 meter wide and 0.8 meters deep around and in the middle of the field in the shape of a "field". Build a good water inlet and outlet system, irrigate well, and prevent wild fish from mixing in.

2. Sow seeds at the right time to improve the survival rate

Shrimp seeds should be released after the rice seedlings turn green. Usually, the young shrimps cultivated artificially that year are released. The standard fiber front grid is 2,000-5,000 per kilogram, and 10,000-15,000 seedlings can be released per mu. Choose a rainy or sunny morning, and release them at different points so that the whole water area has young shrimps to avoid excessive concentration of young shrimps and death due to lack of oxygen. When releasing, release them at different points on rainy or sunny mornings so that the whole water area has young shrimps to avoid excessive concentration of young shrimps and death due to lack of oxygen. When releasing, the movements should be agile. After releasing, add water to keep the water depth of the rice field at 15-20 cm. At ordinary times, pay attention to keeping the water level stable to avoid the influence of shallow water on the swimming and growth of shrimp seedlings.

3. Scientifically feed and strengthen management

Feeding should be started immediately after the young shrimps are released. Generally, bran, bean cakes, or pelleted feed for fish and shrimps can be used. Some animal feeds such as snails, shellfish, and fish should also be appropriately fed. Feed twice a day, mainly in the evening. The daily feeding amount can be controlled at 2%-4% of the body weight of the field shrimps. According to the season, weather and the shrimps' eating conditions, reasonable adjustments can be made to ensure that the shrimps are well fed and grow well. Management points:

1. Regularly change water to keep the water quality in the rice field fresh. Especially in the hot summer and autumn seasons, the water should be changed more frequently. Even when the rice field is left idle, the water level in the shrimp ditch should be kept stable to provide a good ecological environment for the growth of fresh shrimp.

2. Avoid applying pesticides to shrimp paddy fields as much as possible. If necessary, it is advisable to choose some high-efficiency, low-toxic, and low-residue pesticides. The application method: powder should be applied in the morning because there is dew in the morning and most of the powder is attached to the rice stems and leaves; water should be sprayed in the afternoon because the rice leaves are dry in the afternoon and most of the liquid medicine is adsorbed on the rice. Before applying the pesticide, the field should be filled with water, and the water should be replaced with new water 5-6 hours after application to prevent pesticide residues from harming the shrimp.

3. Pay attention to eliminating enemies. Frogs, snakes, water rats, etc. will eat shrimps, so take effective measures to eliminate them in time.

4. Implement rotational fishing and harvest at the right time

The young shrimps released early can reach sexual maturity after 2-3 months of feeding, and reproduce on their own in the pond. The density is too high. The size of the individuals is uneven, which is not conducive to the growth of the shrimps. Therefore, they can be caught in stages from September, catching large and small. The fishing methods include: shrimp cage trapping, shrimp fishing, and sea fishing. By November, the shrimps have stopped growing, and the pond can be drained to drain the water in the rice field and catch the remaining shrimps. The larger individuals can be sold directly on the market, and the smaller individuals can be released separately until May-June next year to be caught and sold.

5. Ensure safety during the wintering of freshwater shrimp

There are two types of shrimp wintering: juvenile shrimp wintering and new shrimp wintering. Juvenile shrimp wintering refers to those shrimp fry bred in August and September, which have not grown to commercial size by December. They are kept as shrimp seeds in March and April of the following year after wintering. Parent shrimp wintering refers to the parent shrimp selected for breeding next year, which are kept for safe wintering to meet the requirements of spawning and reproduction next year.

Cultivating shrimp in rice fields can not only improve the ecological environment of rice fields, but also increase production and income. It is a very promising breeding model. As long as we adhere to the principle of adapting measures to local conditions, strictly follow technical specifications, and effectively strengthen the management of cultivation, we can raise shrimp in rice fields, maintain a stable yield of rice, and obtain a yield of 20-30 kg of shrimp per mu, achieving relatively good economic benefits.

Management of shrimp fry in hot season

1. During the period of young shrimp cultivation: EM original solution and photosynthetic bacteria and other probiotics should be applied once a week to improve water quality and supplement palatable bait. Quicklime should be applied once every 10 days to adjust water quality and supplement calcium sources. The dosage is 15 kg per acre of 1 meter water depth to keep the pH value of the pond water between 7-8.

2. Monitor water quality every day: measure dissolved oxygen, pH value, ammonia nitrogen, nitrite, etc. daily, and take action based on the measurement results.

3. Add new water at the right time: When breeding fresh shrimp, it is necessary to control the water inlet and outlet. The inlet and outlet should be filtered with 60 mesh gauze to prevent wild fish, fish eggs and other aquatic animals from flowing into the pond. During the shrimp seedling cultivation period, add new water every 4-5 days, with a water injection volume of 10-15 cm.

4. When the seedlings grow to about 1 cm, you can switch to artificial powder feed, the main ingredients of which are wheat bran, fish meal, second-rate flour, etc. During the cultivation period, pay attention to the growth of pond plants. If they are too dense, they should be removed to avoid competing for nutrients.

5. Fishing and transportation: Generally, after 30-40 days of cultivation after the release of spawning shrimp, the young shrimp can grow to about 2 cm. At this time, they can be considered as seedlings for commercial shrimp farming. Summer flower nets can be used for pulling nets. Before fishing, water plants in the pond should be removed to facilitate pulling net operations. For short-distance transportation, live fish barrels can be used for oxygenated transportation. Each barrel can hold 300,000 to 400,000 fish within 2 hours, depending on the length of the transportation distance. Some water plants can be appropriately laid in the container during transportation to increase the survival rate of transportation.