Spring is the breeding season for salmon. However, if the management measures are improper, it will lead to a low breeding rate of salmon and a low breeding efficiency. There are five main reasons for the low reproduction rate caused by carp reproduction: First, broodstock cannot reach maturity, resulting in low spawning and low fertility rates. The second is hatching fish eggs mold, that fish mold eggs. Third, the impact of cold air and mildew weather during incubation. Fourth, the hatching pond is not completely clear, leaving natural enemies of fry. The fifth is that the daily management of the fish seedlings fails to meet the requirements and cause death. For these reasons, in order to increase the reproduction rate of squid, the following three points should be made: First, choose a good broodstock. Choose a broodless and harmless broodstock with a healthy, plump body. Females should choose more than 3 years of age, weight generally 3 kg -5 kg; males choose more than 2 years of age, weight 1.5 kg -2 kg can be. In the non-breeding season, females and males should be kept in separate ponds for daily management, and in particular to avoid premature broodstock spawning early in female and male Tong Tong. Usually about 50 females per acre, males can be about 100, daily timing, fixed point, quantitative feed concentrate, the general feeding amount according to broiler weight 2% -3%, usually can also be fed properly Fermented pigs and chicken manure also need to be injected with new water frequently to keep the water fresh, reduce disease, and promote gonad development. Second, the breeding of carp. In the spring of each year, when the water temperature rises above 15°C, breeding and hatching can be carried out. Before the squid pairing, prepare the spawning and hatching ponds. The size of the two ponds depends on the number of broodstocks. The leeward sunny place is the best choice for hatching ponds. However, both ponds have been thoroughly cleared with drugs to kill natural enemies and wild fish. Pond edge grass should be cleared and no basal fertilizer should be used to keep the water fresh. After doing the above work, you can draw a net to broach the fish pond and pick and breed the broodstock. However, you should pay attention to the weather forecast. If there is a cold air invasion in a few days, do not pull the net. Choose the female fish whose abdomen is enlarged, soft and elastic to breed, and then put it into the spawning pond at a female and male ratio of 1:5. Set fish nests at the inlet of fish ponds, and use bamboo sticks to form a square. The size depends on the size of the broodstock, and put a clean and sterilized rooted water hyacinth in the middle. This forms a fish nest. Inject new water daily to stimulate the broodstock to lay eggs. After spawning, the eggs of water hyacinths are sterilized to reduce the incidence of watery mildew. Disinfect and transfer to hatching pond ready for hatching. To reduce the trouble of transferring fish to the pond, about 300,000 fish eggs can be placed per acre. Third, the hatching of fish eggs and fry cultivation. After the eggs are put into the hatchery pond, if it is rainy or cold, cover the fish eggs with straw or a thin film or increase the depth of the water accordingly. The filming time of fry is generally about 7 days, with the temperature slightly increased or delayed. After the fry have the swimming ability, they will take out the fish nest again, but they must pay attention to cleaning the water hyacinth to prevent the fry from clearing with the fish nest. Within 3 days to 5 days after fry release, some soymilk or fermented peanut bran can be fed. Amount per acre of about 2 kg Quanchiposa. As the fry grows up, it can also gradually increase the pouring of manure or feed the fermented chicken and pig manure. At the same time, in order to improve the swimming performance of the fry, daily use branches to drag the pond once or twice. Every morning, we must also observe whether there are floating heads in the fry. If there is any, we should re-inject new water. After the floating head is not present, divide the pond and lower the density. Normally, put 100,000-200,000 in each acre, and gradually increase the depth by 10 centimeters per week. salary. As the fry grows, the fry can be sold gradually. Inflation Devices,Cardiology angiography,PTCA balloon inflation devices,coronary angiography Anesthesia Medical Co., Ltd. , https://www.jssinoanesthesia.com