First, the cause of death of fish during wintering
1. Poor environment in overwintering fish ponds and serious hypoxia caused death. The first is the aging of the pond, which has not been dredged for many years. It is supported by pigs, ducks, and ducks in Tongtou pig and duck ponds. The fish (species) are cultured in high density, with high feeding, high excretion, increased organic matter, and high oxygen consumption; followed by The village edge ponds and town ponds are crowded with residents. The domestic sewage and waste water from the nearby factories are discharged from the ponds. A large amount of oxygen is consumed and the dissolved oxygen is insufficient. The third is the excess of carbon monoxide, carbon dioxide, and hydrogen sulfide in the water, which can also cause fish ( Species) Poisoning death; Fourth, large leakage of fish ponds, poor water retention, lack of fresh water supply, pond water shallow hypoxia, narrow space for fish activities; Fifth, new ponds, thin ponds are not fat, lack of abundant plankton Plants, photosynthesis is weak, oxygen production can not be worthy of oxygen consumption, fish died of hypoxia floating head infection.
2, fish species too small and cause death. The uneven size of the fish species, coupled with improper feeding and strong meats, result in too small a fish size, poorer constitution, and less nutrients accumulated in the body, making it difficult to maintain life activities during the long winter. The energy died because of physical weakness.
3, fish body died of illness. The poor operation of pulling the online market or spelling ponds caused scales, rays, and scrapings of fish scales to scratch and descale them, causing the bacteria to invade infectious diseases, and they are also prone to death during wintering.
4. Mismanagement causes death. During the winter, the fish farmer thought that fish did not eat or eat feed, and managed to loosen, resulting in fish breathing difficulties, a large number of floating heads to death; found that the signs of poor fish did not take timely measures, resulting in delayed fish body Weak death. The wintering ponds leak water, and the shallow ice and snow in the ponds cause the lack of oxygen in the pool water, which will also cause the fish to suffocate.
Second, preventive remedies
1. Reconstruct the wintering culture environment. Select leeward sun, good water retention, adequate water, irrigation and drainage convenient fish ponds, fish ponds 3 acres ~ 5 acres, into 5 acres of fish ponds ~ 10 acres, water depth of 2 meters to 3 meters. Excessive sludge should be removed as an organic fertilizer for crops and fruit trees. Repair leakage, clear the bottom of the pond, retain 20 cm of sludge, and expose to sunlight. Then water into the pond 80 cm to 100 cm, 150 acres of lime release and tea bran 50 kg (even 24 hours after soaking slag even spilled off the pond). After one week, the water level in Wintering Pond will be increased to 1.5 to 2 meters, and 500 kg of fermented organic fertilizer (or 5 kg of urea and 3 kg of phosphate fertilizer) will be used to fertilize the water. Adult fish can eat a lot of food after falling. 2, to improve winter cold resistance. To feed more high-protein and high-fat feeds (such as waste from agricultural and sideline products, peanut bran, bean cakes, wheat husks, maize, and appropriate amounts of fresh green leaf and grass leaves), fatten and grow fish (species). 3, control the stocking density. The stocking is too dense, there is insufficient feed to eat, the fish grows in different sizes, the activity space is small, the water level drops, and it is prone to lack of oxygen. If it is too sparse, it is a waste of water space. In general, 30,000 to 40,000 fish species are distributed in more than 10 centimeters, and 10,000 or less are used in water-resource supplementation. If it is a fish pond breeding, general acre put 300 kg can not be listed on the adult fish, but also how much to catch back, what to catch what to put, keep the fish is relatively stable, it is beneficial to increase production and income. Quarantine before stocking, immersing the fish body with 4% to 5% salt water, and sterilizing after ten minutes.
1. Poor environment in overwintering fish ponds and serious hypoxia caused death. The first is the aging of the pond, which has not been dredged for many years. It is supported by pigs, ducks, and ducks in Tongtou pig and duck ponds. The fish (species) are cultured in high density, with high feeding, high excretion, increased organic matter, and high oxygen consumption; followed by The village edge ponds and town ponds are crowded with residents. The domestic sewage and waste water from the nearby factories are discharged from the ponds. A large amount of oxygen is consumed and the dissolved oxygen is insufficient. The third is the excess of carbon monoxide, carbon dioxide, and hydrogen sulfide in the water, which can also cause fish ( Species) Poisoning death; Fourth, large leakage of fish ponds, poor water retention, lack of fresh water supply, pond water shallow hypoxia, narrow space for fish activities; Fifth, new ponds, thin ponds are not fat, lack of abundant plankton Plants, photosynthesis is weak, oxygen production can not be worthy of oxygen consumption, fish died of hypoxia floating head infection.
2, fish species too small and cause death. The uneven size of the fish species, coupled with improper feeding and strong meats, result in too small a fish size, poorer constitution, and less nutrients accumulated in the body, making it difficult to maintain life activities during the long winter. The energy died because of physical weakness.
3, fish body died of illness. The poor operation of pulling the online market or spelling ponds caused scales, rays, and scrapings of fish scales to scratch and descale them, causing the bacteria to invade infectious diseases, and they are also prone to death during wintering.
4. Mismanagement causes death. During the winter, the fish farmer thought that fish did not eat or eat feed, and managed to loosen, resulting in fish breathing difficulties, a large number of floating heads to death; found that the signs of poor fish did not take timely measures, resulting in delayed fish body Weak death. The wintering ponds leak water, and the shallow ice and snow in the ponds cause the lack of oxygen in the pool water, which will also cause the fish to suffocate.
Second, preventive remedies
1. Reconstruct the wintering culture environment. Select leeward sun, good water retention, adequate water, irrigation and drainage convenient fish ponds, fish ponds 3 acres ~ 5 acres, into 5 acres of fish ponds ~ 10 acres, water depth of 2 meters to 3 meters. Excessive sludge should be removed as an organic fertilizer for crops and fruit trees. Repair leakage, clear the bottom of the pond, retain 20 cm of sludge, and expose to sunlight. Then water into the pond 80 cm to 100 cm, 150 acres of lime release and tea bran 50 kg (even 24 hours after soaking slag even spilled off the pond). After one week, the water level in Wintering Pond will be increased to 1.5 to 2 meters, and 500 kg of fermented organic fertilizer (or 5 kg of urea and 3 kg of phosphate fertilizer) will be used to fertilize the water. Adult fish can eat a lot of food after falling. 2, to improve winter cold resistance. To feed more high-protein and high-fat feeds (such as waste from agricultural and sideline products, peanut bran, bean cakes, wheat husks, maize, and appropriate amounts of fresh green leaf and grass leaves), fatten and grow fish (species). 3, control the stocking density. The stocking is too dense, there is insufficient feed to eat, the fish grows in different sizes, the activity space is small, the water level drops, and it is prone to lack of oxygen. If it is too sparse, it is a waste of water space. In general, 30,000 to 40,000 fish species are distributed in more than 10 centimeters, and 10,000 or less are used in water-resource supplementation. If it is a fish pond breeding, general acre put 300 kg can not be listed on the adult fish, but also how much to catch back, what to catch what to put, keep the fish is relatively stable, it is beneficial to increase production and income. Quarantine before stocking, immersing the fish body with 4% to 5% salt water, and sterilizing after ten minutes.
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