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Unity Reservoir has a suitable fishing surface of 10,500 acres, with an annual output of about 200,000 kilograms of fresh fish, basically with the self-promotion, self-education, self-acquisition "one-stop" production capacity. In the long-term Aquaculture process, it has been found that the single-fed artificial feed aquaculture efficiency is not as good as that of natural fodder feeding. Now, we will introduce the case of raising cages and grass carp and turtles for feeding and feeding. First, feeding mode and results Meshes feeding grass carp feeding mode and results 1997-1999, Unity Reservoir breeding cage 101. Each year, nearly 80,000 fish species are released, and the annual output is 75,000 kilograms. Production was stopped due to low prices in the sales market. Single-stretched compound feed: The cages are arranged in a “field†shape, and each group is reared with two groups of 4 cages each. The stocking density is 30 to 40 fish per square meter, and one group of cages is fed at one time. The feeding time of the box is about 50 minutes. The bait coefficient is 3. The feed cost is 7.5 yuan/kg. Grass and extruded compound feed: 1 kg of grass carp requires 1.4 kg of extruded feed, 9 kg of fresh grass, and the feed cost is 5.3 yuan/kg. And can out of the box, the incidence of small, high survival rate, specifications, an average of up to 1.5 kg / tail. 2. Feeding mode and results of turtle feeding The Unity Reservoir has a 3.5-mu pool of pro-shelled turtles and was bred at the highest peak in 1996. The price has been declining all the way. Pro-shelled turtles fed a total of more than 2,000 kilograms of fresh fish from 2001 in 2001. Turtle fish feed 750 kg, feed input 13,500 yuan, spawning 66,000, the output value of 66,000 yuan, the egg feed cost is o.20 yuan / piece. In 2002, Tuanjie Reservoir was closed, and no small miscellaneous fish were caught. 7a had fresh fish sources. All of them changed to compound feed to feed the pro-shelled turtle. A total of 1,600 kg of turtle feed was added to the fish and was valued at 15,000 yuan. Due to the absence of fresh fish, the spawning volume was significantly reduced, with 54,000 communes producing 5.3 million yuan worth of eggs, and the cost of feeding the eggs was o.28 yuan/piece. Second, the results of analysis The above experience only applies to small-scale farms and individual farmers who do not have scientific research capabilities. Because they do not have the ability to adjust feed formulas in time to meet the needs of different periods and different specifications of aquatic products, they cannot rely entirely on compound feeds for breeding. 2. In cages, grass-fed fish only use puffed feeds to start growing faster. When individuals grow to about 0.5 kilograms, body fat accumulates in a large amount, the intestinal tract is short, and later digestion and absorption capacity is poor, and the growth rate is also slow. It is easy to get sick and even die, which leads to a high feed coefficient, and the combination of feeding fresh grass solves this problem. 3. Pro-shelled turtles with single compound feeds have a thin egg shell and are easily broken. The eggs have more ovals and depressions on the surface. The appearance is poor, and the weight of the eggs is also smaller than in previous years. Probably not. Eating fresh fish lacks the vitality of protein and calcium. (Bureau of solidarity reservoir Ningdu County: Li Wei)