Jiangsu Shuhuang Dezheng Efficiently Cultured Hairy Crabs

Comrade Huang Dezheng was a resident of Baoji Town in Ji County, Jiangsu Province. As a model fishery science and technology developer, he actively promoted and used new technologies and models for fishery production and achieved good economic benefits. He played a leading role in the local area.

I. Fundamental Situation of Aquaculture In 2010, he contracted 295 acres of ponds for aquaculture at the Shaodeng Wharf, Shaodeng Village, Baoji Town, Jixian County. The main cultured species was river crab. In the stocking of crab species, large-sized and high-quality crab species were selected. By the end of February, a total of 2,065 kilograms of crabs were stocked and 7 kilograms of species of crabs were stocked in an average of 90 to 110 per kilogram. The principle of scientific and rational feeding on feedstuff feeding is adhered to. The main types of feedstuffs are mainly small trash fish or ice fish, pellet feed, soybean meal, potato and bran, and the daily feed accounts for 3% of the weight of pond crabs. 5%, the specific amount of feeding according to the crab's food and weather conditions and flexible control.

Second, the breeding efficiency of 295 acres of purse seine crabs to accumulate a total of 23,489 kilograms of high-quality merchandise crabs, the output value of 2,355,575 yuan, net income of 1,295,345 yuan, an average yield of 79.62 kilograms of crab, mu production value of 7985 yuan, 4991 yuan per mu net income, crabs The average specification is 0.175 kg/only.

Third, the main breeding experience 1, do Tongkou clear pond disinfection work. Leveling the mouth of the pond, remove excess silt from the bottom of the pool, and keep the depth of silt no more than 35cm. Thorough clearing of the pond with lime is used to kill various wild fish and pathogenic microorganisms.

2, set up microporous oxygen equipment. Installation of microporous oxygen enrichment equipment consisting of blower, main pipe, branch pipe, auxiliary pipe and aeration plate, in which 25 aeration plates were placed to meet the oxygen demand of Tangkou.

3, close planting plants. Planting aquatic plants in Tangkou provides a good ecological environment for the growth of crabs. The species of aquatic plants include Elodea, Vallisneria, Hydrilla verticillata, Water Peanut, Water hyacinth and other species. The planting area of ​​normal aquatic plants accounts for 50% of the total pond area. About 60%.

4, put snails. Put fresh snails around Qingming to provide natural bait for crab production while reducing the cost of feed and repairing the bottom of the pool. Normally, 300-500 kilograms of snails are placed per acre.

5, crab species stocking. The released crab species require uniform specifications, complete appendages, no disease, no injury, and strong vitality. The average specification is controlled within 110 pieces per kilogram, and the stocking quantity per mu is maintained at 600-800 pieces.

6, scientific and reasonable feeding. During the entire crab breeding process, feed should be scientifically and rationally fed to ensure that the crabs eat well. Specifically, the principle of “two-headed, medium-coarse” feeding is adopted, especially in the later stage of crab breeding, and the feeding intensity of concentrated feed must be increased. Maximize the development of crabs. At the same time, Baibao adheres to the principle of "four timings (timed, quantitative, fixed-point, and qualitative)", and the best situation is based on feeding the feed within 2 hours.

7, daily management. In the daily management process, do a good job of patrol ponds, check the river crabs for food and water quality, regularly check the growth of the river crabs with cages, add new water in a timely manner in the hot season, and open the microporous oxygen enrichment equipment to increase the water body. The amount of dissolved oxygen ensures that crabs grow well in good water bodies. Use biological agents to improve water quality and sediment quality to ensure that the water quality is in a tender and refreshing state.

8, pest control. Do a good job of daily prevention of pests and diseases. Disinfect the water with lime every 15 to 20 days. Especially in the high-risk season, the use of external disinfectants combined with internal bait feed should be used to prevent and treat diseases and pests.

Comrade Huang Dezhen has a passion for aquaculture, actively participates in fishery science and technology training classes organized by provinces, cities and counties, studies scientific breeding techniques and methods, takes the lead in using micropore oxygen aeration facilities, and has achieved good economic benefits in local crab farming. Taking the lead, his crab breeding base has become one of the "Baogong" brand high-quality crab breeding bases. He personally has also become a key demonstration household for the provincial fishery technology.