The farmer Yang Dahua, male, 58 years old, was born in Gaodun Village, Yangjiang Town, Gaochun County, Nanjing. He has been engaged in shallow water ecological crab breeding for the second year in the Nandang Valley. The breeding area is 13.6 acres, and the average annual net profit was 3,850 yuan in 2007. On the basis of this year, he also enjoyed a bumper harvest. At the beginning of this year, he stocked 6,200 dungeons of local self-cultivation, set up cages for green and squid, planted a variety of plants, and fed 11,500 pounds of snails. After 6 months of careful feeding, they started on September 5th. A total of 4,310 merchandise crabs were caught, with an average of 185 grams of merchandise. The sales price was 23 yuan/piece, the sales income was 99,130 ​​yuan, and the sales value of green prawn and squid was 107,000 yuan, excluding the breeding cost of 41,700 yuan. Profit of 65,300 yuan, net profit of 4,800 yuan per mu, its successful breeding experience has the following experience:

I. Careful and meticulous in purchasing local self-developed dungling crabs. In the past two years, he has chosen the local self-breeding dung beetle and he focused on the cultivation pond for the first year of rice field excavation, and he chose to have a good accumulation of nutrients, a robust body, no disease, no disability, high surface color and neat specifications. High quality crab.

Second, low-density farming. Each acre stocking each about 10 grams of crabs species 450-480 only, strive to develop large-size commodity crab listing.

3. Put a certain amount of fresh snails in due course. To put a certain amount of fresh snails and oysters in crab ponds in batches can not only purify water, but also provide abundant live feed for crabs. He has invested more than 800 pounds of snails for two consecutive years.

Fourth, grow grass crabs. Aquatic plants selected emergent plants and submerged plants, Elodea, Vallisneria, black algae; Artemisia, reedgrass three, the shore a certain amount of water peanuts, covering about 70%.

Fifth, disease prevention. Strengthen water quality management, regularly disinfect the water body, and splash lime once every two months to minimize the use of drugs or drugs, and not to use drugs that have side effects on crab farming.

Six, science feeding. After decapitating crabs, they are fed with compound feeds with high protein content; after the second oyster shell, animal feeds such as fresh fish are mainly fed, supplemented by plant feeds; during the high-temperature period, plant-based feeds are mainly used. Supplemented by animal nature; more than one month before catching it on the market, it is intensively fed with high-quality animal and plant feeds to ensure the upgrade of quality and specifications.

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