CATDOLL : CATDOLL: Do you know the key points of shrimp farming technology? Do you understand all of this?

Do you know the key points of shrimp farming technology? Do you understand all of these?

In recent years, freshwater shrimp farming in Suining County, Xuzhou City, Jiangsu Province has developed rapidly, with the main farming area of ​​nearly 12,000 acres. The author combined the experience of home-based guidance of freshwater shrimp farming by farmers and discussions with farmers, and summarized the technical measures to improve the efficiency of freshwater shrimp farming.

1. Choose a good breeding place.

Shrimp ponds should be built in places with sufficient water resources, fresh and pollution-free water, and abundant aquatic plants. The area of ​​aquatic plants should account for 20-30% of the pond area. The pond area should be 2-10 acres, preferably rectangular, with a water depth of 1.2-1.5 meters and silt not exceeding 10 centimeters. It is best to have shallow water around the pond. It is best to use quicklime to clean the pond and add fertilizer to the pond.

2. Pay attention to seedling quality

The best shrimp fry are those that are naturally bred in the ponds, which should be uniform in size, bright in color, and have strong jumping ability. Artificial breeding should use large-sized shrimps that lay eggs in the ponds as parents, and try to avoid not changing the species or cleaning the ponds year after year, and breeding and raising the shrimps by themselves, which will lead to the degeneration of their traits, small size, and poor disease resistance.

3. Improve stocking patterns and determine reasonable stocking density

To increase the production and benefits of fresh shrimp, we must change from extensive farming to intensive farming, from stocking spawning shrimp to stocking shrimp fry, and from one batch of shrimp to two batches of shrimp. Reasonable stocking can improve the commercial rate of autumn shrimp. From late July to early August, 40,000 to 50,000 strong fry of 1.5-2 cm should be stocked per mu. If you buy fresh shrimp for self-breeding, you should choose strong, mature, and large shrimps over 5-6 cm from lakes or rivers from late June to early July, set up special ponds for seedlings, and wait until the shrimp fry grows to 1.5-2 cm. After 10-15 days of stocking fresh shrimp, 40-50 silver carp of 50-100 grams per tail should be stocked per mu. -

4. Do a good job in water quality management

The water level of the pond is about 60 cm in spring, 1.2-1.5 meters in summer, about 80 cm in autumn, and 1.5 meters in winter. The water transparency is regulated at 25 cm in the early stage of breeding, 30 cm in the middle stage, and 35 cm in the late stage. The dissolved oxygen is not less than 5 mg/L. In the early stage, fertilization is mainly used to cultivate biological bait. In the middle stage, water is regularly injected. In the late stage, water is frequently changed to prevent water aging and promote the molting and growth of shrimp. At the same time, quicklime is sprinkled every 15-20 days to increase the pH value and increase the calcium ions in the water, and the pH value is maintained between 7-8. Regularly use photosynthetic bacteria biological agents to improve water quality and bottom quality.

5. Pay attention to feed quality and feed scientifically

Freshwater shrimps are omnivorous. There are two peak feeding periods in a year, namely April-May and August-October. Freshwater shrimps are best raised with pellet feeds, and animal feed should account for more than 30%. Freshwater shrimps like to forage along the pond edge at night. You can observe their feeding. Generally, they are fed twice a day, with the morning feeding accounting for 1/3 of the total daily feeding amount, and the evening feeding accounting for 2/3.

6. Strictly control diseases

Start with pond cleaning, clean the pond well, select the right species, maintain the water well, feed the right materials, and do a good job of preventing diseases at every level. Once a disease occurs, timely measures must be taken to improve the water quality and prescribe the right medicine. When treating the disease, attention must be paid to the use of drugs that are sensitive to fresh shrimp. It is strictly forbidden to change the water or flush the water when the shrimp is molting, otherwise it will cause a large number of molting shrimp to die.

The above are some key points about shrimp farming. I hope it will be helpful to everyone.

Freshwater shrimp farming: First, strengthen water quality control. Generally, in late October, freshwater shrimp farming ponds need to be fertilized in autumn to ensure adequate nutrition.

The pond culture of fresh shrimp requires no silt on the bottom of the pond, sufficient water, fresh water quality, no pollution, convenient water intake and drainage, and meets the national standards for fishery water. The best time to feed is usually 5 pm. When feeding, sufficient bait can be evenly spread around the shrimp pond to prevent the fresh shrimp from killing each other due to hunger.

In the process of breeding green shrimp, you should first choose a pond with relatively stable water flow, monitor the water source reasonably, and pay attention to reasonable feeding.

How to raise shrimps in rice fields with high yield technology

1. Selection of rice fields for shrimp farming. Rice fields for shrimp farming should be selected in fields with convenient drainage, sufficient water sources, good water quality, and good water retention performance. Where conditions permit, it is better to concentrate and connect them for easier management.

2. Field engineering for rice-shrimp symbiosis. A circular ditch or "田"-shaped field engineering should be excavated for shrimp-raising rice fields. The circular ditch engineering is to dig a circular shrimp ditch with a width of 2-3 meters and a depth of 0.5-1 meters along the ridges around the field. The ditch is built with ridges around it and is watertight. The circular ditch should be 1-1.5 meters away from the ridges. At one end of the circular ditch, a 5-meter wide and 1.2-meter deep shrimp temporary rearing pond should be dug. The "田"-shaped engineering is to dig a "＋"-shaped shrimp ditch in the middle of the field while the circular ditch is opened. This ditch is 2 meters wide and 0.5-0.7 meters deep, and is connected to the circular ditch. At the same time, each rice field must have a water inlet and outlet system, and the water inlet must be filtered with a dense net to prevent *trash fish from entering.

3. Timely planting and management of rice. Rice varieties should be early-maturing single-season or single-season hybrid late rice varieties with strong stems, strong fertilizer resistance, not easy to fall over, and strong disease resistance. Apply 20-30 dan of livestock and poultry manure per mu of paddy field, then plow the field with water, level the field, and sprinkle 100 kg of quicklime or 1 kg of pond cleaning per mu. To kill loaches, eels and other pests in paddy fields. Before transplanting, apply 40 kg of ammonium carbonate and 30 kg of phosphate fertilizer per mu. Start planting seedlings and rice production management in mid-June. It should be noted that when applying pesticides to rice, high-efficiency and low-toxic pesticides should be used as much as possible. It is forbidden to use trichlorfon and pyrethroid pesticides. The method of using pesticides is to spray them on the stems and leaves of rice to avoid falling into the water. After applying the pesticides, inject new water in time to ensure the safety of shrimps. The rice field baking for shrimp farming should be done lightly, that is, the water level should be lowered until the field is exposed. The baking time should be short, and water should be added to the original position immediately after the baking is completed.

4. Stocking of shrimp fry. Stocking of shrimp fry begins in early July, with 20,000 to 30,000 shrimp fry per mu. Stocking should be done before 9 a.m. and the shrimp fry should be evenly stocked in the surrounding trenches. Plant appropriate amounts of revolutionary grass or water spinach in the surrounding trenches to provide a habitat for the shrimp.

5. Feeding and management. Feeding should start after the shrimp fry are released. The feed should be a special shrimp pellet complete feed. Feed twice a day, i.e. 8-9 am and 5-6 pm. The feeding amount in the morning is 1/3, and the feeding amount in the afternoon is 2/3. The daily feeding amount is about 5% of the shrimp body weight, which depends on the weather and the feeding situation of the shrimp. Feeding is mainly done in the surrounding ditches and nearby areas, and a small amount is fed appropriately in the field. Water is injected every 5-7 days, and the water level on the paddy field should be maintained at about 10 cm, so that the shrimp can reach the field to feed, increase the activity space and promote growth. In high temperature seasons, change the water frequently to reduce the field water temperature and make it suitable for the growth of shrimp. Use 60-mesh gauze to filter the water when it enters to prevent miscellaneous fish from entering the shrimp rice field.

6. Harvesting of shrimps. Rice is harvested around the time of frost. First, the water level should be gradually lowered to introduce shrimps into the shrimp ditch, and then the rice is harvested after the field surface is exposed. After the rice is harvested, the water level can be deepened to about 1 meter, and feeding management can be continued. In winter, the shrimps can be put on the market according to market conditions.