1. The ecological conditions of the transplanted waters. First, where the minimum water temperature of the transplanted water is between 00C and the maximum water temperature of 380C, the shortest growth period should be more than eight months before it is conducive to the normal growth of the carp. Second, there are conditions for natural spawning, that is, during the period from May to June when the water temperature is between 20-280C. During this period, there is natural rainfall that can generate runoff and divert water from outside to form the impact range of water. Natural spawning breeding. Third, the newly transplanted waters should have a certain amount of bait basis, and the water quality should be more fat. All kinds of predators should not be too much, so as to avoid damaging the eggs and fry of salmon and affecting the transplant effect.
2, the number of transplants. The number of transplants must be determined by taking into consideration the water surface size of the transplanted water, the basis of the feed, the number of fish that is harmed, the financial strength, and management capabilities. According to our practice, in order to benefit early, we propose the following reference numbers for transplanting fish flowers and large-sized fingerlings: Generally, the water surface is in the range of 1 mu to 10,000 mu - 100,000 mu, depending on the size of the water surface, and each mu can be transplanted separately. Fish flower 150-100-50 tail; transplant large-size (7-15 cm) winter piece or spring piece of fish species, can put 80-50-30 tails per mu; if the water quality is more fat and feed fertilizer, put in The number can also be increased appropriately.
3, fry transport tools. Carp transplantation depends on the distance of transportation, quantity and transport time to choose the transportation tools. According to our experience, short-distance transportation: 50-100 kilometers, a transfer capacity of about 500,000 or so can choose to take the bus; journey in the 100-300 kilometers of medium-range transportation, the number of shipping fry under 1 million, you can take Trains, the number of more than 2 million is best to use the car transport; long-distance transport: 500-1000 km range, a transport of more than 5 million, the transport time should be controlled within 24 hours, you can choose the aircraft consignment or charter special Yun. All the above transplants use double-layer oxygen bags and packaged packaging to transport oxygen. The number of fish in each bag is about 50,000, and about 500 to 1,000 tails of large-size species are loaded.
4, the transplant time and the water temperature that should be mastered. 1 Transplantation time. The fish flower is between mid-April and early June in spring, with the focus on May; large-size fingerlings (7-15 cm) are transported from winter to the following spring, from November to March of the following year. 7 The transplanted water temperature should be controlled between 20 and 28°C in spring. When the air temperature is more than 30°C, it is necessary to consider cooling and choose cloudy or night transport. The water temperature of winter and spring films should be transported between 6-18°C, and cooling should be considered when the temperature is greater than 25°C. 3 The origin of the fry and the newly transplanted waters, the temperature difference between the temperature of the two places during the transplant shall not be greater than 10 °C. 4Fish transplanted to the end point, to put the oxygen bag of fry on the water for about 20 minutes, in order to balance the temperature difference, until the water temperature difference between the two temperatures below 2 °C, in order to open the fry bag, slowly into the new waters. 3 The oxygen transport time per bag is generally not more than 24 hours, and oxygen must be added on the way beyond this time.
5, to choose transplant points. Fish seedlings can be transplanted in special fishing ponds to cultivate fish fry. After several months of cultivation, large-scale fry fingerlings can be put into reservoir lakes. The method of transplanting fry (fish) into large and medium-sized waters can also be adopted. The effect is better than the former. Where the latter method is adopted, the fry input location must be rich in bait, and the tail of the reservoir with relatively good water quality, reservoir bay, reservoir edge, the transparency is not more than 0.7 meters, the water depth is in the shallow water area of ​​l-3 meters, and there is aquatic grass. The place is better. When the number of fish fry is larger at one time, it must be distributed evenly in multiple places.
6, transplant effect check. After the fish flower is generally put into use for 3 months, the specifications can reach 10-15 cm and the weight is 30-50 grams. At the end of the year, the size of the fry can reach 100 grams, and the large size of the transplanted fish can reach about 300 grams at the end of the year, indicating the beginning of the fry transplantation. See results. At the end of the second year, the squid reached about 500 grams with a certain amount. In the third year from May to June, it was discovered that there was an oviposition activity in the squid cluster and a large number of small fry were found in the months from July to August. The above fully shows that the squid migration is also complete. Success.
7. Discussion of other waters. The water content in the Yellow River is much more muddy; the water in the Qinghai Lake and the coastal areas contains more salt; the temperature in the northwestern Northwest is low and the freezing period is long. Whether the above areas can be transplanted and domesticated successfully, are currently under exploration and trials. We welcome aspirational people to cooperate To explore, we can provide some fry for free trials.
8, transplant benefits. Transplantation of carp is a new technology with higher economic benefits. As long as it is properly mastered and boldly practiced, it can achieve very significant economic benefits within 2-3 years. All transplanted large and medium-sized waters can increase the output of squid by about 5 kilograms per mu without increasing any feed, and increase income by 50 yuan per mu. If large and medium-sized waters are transplanted, baiting fertilization and semi-intensive breeding will be implemented. Each mu can increase the yield of squid by about 10 kilograms and increase the income by about 100 yuan per mu.