We implemented the three projects of Jiangsu Province, "Demonstration and Promotion of Integrated Techniques for Crawfish and Shrimp Culticulture, and conducted a high-efficiency aquaculture test in Maoxu Village, Bacheng City in 2005, and achieved significant economic benefits. We will now test The situation is summarized as follows.
I. Pond conditions
1. The test pond covers an area of ​​26 mu. There are 3 in Tangkou, which are rectangular and north-south. The drainage is convenient. The slope ratio of the pond is 1:2.5, and the mud at the bottom of the pond is about 20 cm.
2. Dry Pond Clear Pond The bottom of the pond was frozen at the end of November and December of 2004. In February 3, 2005, 10 to 20 centimeters of water was infiltrated, 150 kilograms of quicklime was used, and 8 kilograms of bleached powder was used to clean the pond on the 18th.
3. Cultivating water quality On February 19, 10 mu of urea and 5 kg of compound fertilizer were used to cultivate fertilized water and natural palatability feed.
4. After planting and fertilizing the spirulina, planting turf with black algae, the area accounts for about 30% to 40% of the pond, and at the same time, 150 kilograms of live snails are put in the acre to serve as live bait for crabs and shrimps.
5. Equipped with aeration equipment pool Each 5 to 7 acres of the pool is equipped with a turbo aerator, a total of 4 sets, increase oxygen and improve the water environment.
Second, seed stocking
1. The quality of seedlings adopts the Yangtse River Crab parent breeding in the Yangtse River water system and breeding of egg-bearing shrimps. The locally-cultivated high-quality crab and shrimp seedlings are of uniform specifications, uniform body color, complete talons, active activities, and lively swims. They are stocked after disinfection.
2. The stocking time was released on February 26 for fresh shrimp, on March 5 for crabs, and on March 11 for white fishes.
3. Stocking specifications and quantity: 1100 tails/kilograms of shrimps, 15 kgs of acres, 110 heads/kilograms of crabs, 769 acres, 20 tails/kilograms and 50 pigs.
Third, feeding and management
1. The feed is fed in full-grain pellet feed, corn and small junk fish from the beginning of March. The amount of feed is controlled by 3% to 8% of body weight, and the proportion of animal and plant feed is controlled at 30:70, gradually increasing from September to October. Increase the proportion of vegetable feed. Feeding method 2 times a day, 90% in the morning, 30%, 70% in the afternoon, adjust by "four look, four set" measures, basically stopped feeding after mid-November, high temperature weather, continuous cloudy days, moderate amount cast.
2. Water Quality Management Early in the breeding period, some quicklime is used to regulate water quality. Microbiological preparations are used to regulate water quality from the end of May, specifically on May 15, June 16, July 9, August 25, and September 5. Five times each mu with 0.75 kg of biological agents to regulate water quality. The water level at the early stage of the pond is controlled at about 60 cm, which is beneficial to the growth of aquatic plants. Afterwards, the water level is gradually deepened. From June to September, the water is changed every 3 to 4 days, each time the water is about 20 centimeters, and when the water is used, 60 is used. ~ 80 mesh sieve filter. In the hot season, increase the frequency of water exchange, and then advance first. The oxygen aerator is often turned on at noon on sunny days to improve the water quality and promote the growth of crab and shrimp fish.
3. Disease prevention and control The principle of prevention and treatment shall be adhered to, and oxygenation measures shall be taken. In early May, the water depth of 1 meter per mu is used to prevent 500 grams of net fibroin and 350 grams of Povidone in the middle and late stages. Two bacterial diseases, with Baowei iodine treatment effect is better.
Fourth, the test results
1.Harvest output till the end of dry pond on December 27th, a total of 3000 kg of commodity crabs were harvested, with an average of 115.38 kg per mu, with an average size of 175 g; 1050 kg of green shrimp, with an average yield of 40.38 kg, with an average size of 240/kg; 2100 kg of fish.
2. The total output value of the production value is 300,000 yuan, and the average price is 11,538.46 yuan per mu. The sale price of crabs is 83.34 yuan/kg, the output value is 250,000 yuan, and the average is 9615 yuan per mu. The output value of the green shrimp is 38,000 yuan, and the average is 1,461 yuan per mu. The output value is 12,000 yuan.
3. The total cost of the cost expenditure is 96,000 yuan, an average of 3692 yuan per mu, including grain feed 21,510.06 yuan, small trash fish, snails 21060 yuan, corn 11,700 yuan, electricity costs 5,980 yuan, drug fees 5,200 yuan, pond rent 10,400 yuan, seedlings 20150 yuan.
4. Economic benefits The net income is 204,000 yuan, with an average of 7,846 yuan per mu.
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