Trout is a carnivorous fish, which feeds on land and aquatic insects, crustaceans, shellfish, small fish and fish eggs, and feeds on leaves and seeds of aquatic plants. Geographical and climatic conditions of the construction site of "Runway Pool" The construction site of trout "Runway Pool" is Kongyashan Village, Makeng Township, Hua 'an County, with an altitude of 1 1,000m. The surrounding towns are at the altitude of natural mountains and rivers, with rich water quality and no pollution, and the water temperature is kept below 20 degrees all the year round. The construction of the "runway pool" is made of stone, and the bottom and surface of the pool wall are covered with cement. * * * Build three "runway pools", each with a length of 12m, a width of 3m and a height of1.2m; Yes Build a main water inlet channel, each pool has a water inlet and a water outlet, and each water inlet and outlet has a filter screen. The bottom of the pond slopes from the entrance to the exit.
The water level of the pond is kept at about 0.8 meters all year round. Three, "runway pond" culture technology and method 1. Variety introduction and trial planting trout farms introduced two species of golden trout and rainbow trout in Xinjiang and Beijing for the "runway grass" experiment. Improper water temperature adjustment two years before trial planting led to inconvenience in seedling raising and low viability. After the daily management test form is successful, master the direct information of the form and constantly improve the management measures. The main methods are: (1) adopting the "four-well bait mode", that is, feeding regularly, quantitatively, positioning and qualitatively, and keeping feeding twice a day according to the weather, water temperature, fish size and fish growth. Whenever observing the situation in the pond, it is best to feed when most fish are no longer rushing to eat.
Collect the opinions of relevant experts, and adopt the compound feed of Pseudosciaena crocea for trout culture. (2) Discharge the dirt in time. Fish manure and residual bait are produced by bait. Clean and scrub the bottom of the pond regularly (once a week) to stir the water, increase the water inflow, make the water flow quickly, push the manure and residual bait into the sewage outlet, and discharge pollutants from the sewage outlet to reduce water pollution. (3) Water quality regulation. Because the pond water is not equipped with a yield increasing machine, the aquaculture water area is mainly oxygenated by natural water. The pond water flows continuously for 24 hours, and the dissolved oxygen in the water is kept above 6 mg/L. When the water source is turbid in rainy days, the fish in the pond should stop or reduce the water inflow to avoid hypoxia. 2 hours before and after feeding, add fresh water appropriately. If the fish is found to lack oxygen in the middle of the night, it is necessary to replenish new water injection.
3. Disease prevention adhere to the principle of "combining prevention with control", and disinfect the bottom and wall of the pond with bleach before entering the seedbed. Feeding inorganic salt nutrition bait, dissolving 250 grams of inorganic salt in water to make 50 kilograms of bait, and feeding it to fish species and idioms damaged by long-distance transportation. It can regulate the osmotic pressure of fish, maintain the normal movement of body fluids, promote the growth of skin and mucosa, and accelerate wound healing. Feeding VC and honey nutrition bait, dissolving water in VC 10g, mixing 1kg honey and 10kg bait evenly, feeding once every 10g, can increase the utilization of protein and fat for fish, and promote growth and bone development. Mixing VE5g with 1kg oil and feeding 100kg bait once a week can increase the protein and fat utilization rate of fish and improve the anti-anemia function of fish.
4. Role of culture: The temperature in the south of China is high, and the temperature in the high-altitude mountainous areas is low. In addition, the natural high-quality environment where pollution-free mountains and rivers are located makes it possible to breed "cold water" trout. After the construction of "runway land", the introduction of varieties and daily management were combined to do a good job in prevention and control. An empirical study on cold-water fish and trout in some mountainous areas of southern China. Sum up experience 1. The wrong transportation method or operation of trout in the process of transportation and fishing is easy to cause fish body damage, the resistance of injured salmon decreases, it is easy to be infected with germs and reduce the survival rate. 2. Pay attention to the water quality in rainy days, and control the inflow when the water is turbid. 3. Trout has high economic value, and it is a newly introduced fine variety in our county. "Runway grass" culture is one of the feasible breeding methods.