One year's plan is spring. The management of spring fish ponds can not only promote the fish to eat earlier, restore constitution, extend the growth period, increase yield, enhance disease resistance and increase survival rate. Moreover, due to the low temperature in early spring and less fry activity, it is not easy to be injured during fishing, transportation, and delivery. The survival rate of fry is high. In the specific operation, we must pay attention to the following points:
First, stocking of fish ponds should be based on local food and water quality conditions to determine the main breeding species. If grasses and dry grass are abundant, grass carp and carp should be raised. If the fat source is sufficient, you can raise squid, squid, squid, and tilapia. The area where there are many snails and clams can raise herring and mackerel. The amount of stocking depends on the conditions of the pond and the level of feeding and management. Intensive culture of fish ponds generally put 1,500 to 2,000 tails per acre, and rough fish ponds have 500 to 1,000 tails per acre. In the stocking process, the following levels should be considered:
1. Clearance of clear ponds. The pond must be thoroughly rectified before stocking. Pumping dry ponds, removing excess silt, repairing pond bases, entering and exiting sluice gates, and providing a good growing environment for farmed fish. After that, 100kg of lime and 60kg of tea bran were used for the mu, and the whole pool was splashed with water after breaking and soaking for 48 hours. The role of quick lime in addition to kill wild fish and pathogens in vitro, but also improve the soil, and acidity. While tea bran can cultivate plankton-rich plankton, the disappearance of medicinal properties is also a nutritious feed for fish seedlings.
2. Disinfection of fingerlings. Disinfection of fingerlings is a practical and effective method of cutting off pathogens and preventing fish diseases. Before the fish species is under the pond, it should be washed with 10ppm bleaching powder or 8ppm copper sulfate for about 20 minutes, or the two drugs can be used simultaneously. If the above-mentioned drugs are lacking in remote mountain areas, fish bodies can be soaked with 4% saline solution for 20-30 minutes, and the disinfection effect is also good.
3. Fish species rearing. The stocking of fingerlings should be selected when the weather is high on sunny days. Avoid rain, snow, and windy weather. The place of stocking should be chosen to be sheltered from the wind and place fish containers (pots, buckets, etc.) into the water so that they can slowly tilt and allow the fry to swim into the pond.
Second, raise the water temperature in a timely manner within the appropriate temperature range, the fish will increase food intake as the water temperature rises, and accelerate growth. Therefore, the water level of fish ponds in early spring should be controlled at 0.6 to 0.8 meters, so that the water temperature can be raised quickly to facilitate the full play of the fertilizer effect and promote the fish to eat earlier. After the spring, inject water. When adding new water, do not inject a large amount of water each time, so as to prevent the temperature from dropping. At the same time, appropriate organic fertilizers should be applied to improve the water temperature. In case of continuous rainy weather, the depth of pool water should be increased to prevent the water temperature in the pool from changing too much.
Third, the water quality adjustment should be suitable after the spring, as the temperature, water temperature gradually rise, the fish's biological feed began a large number of breeding. If water quality is found to be aging and acidic, 20 cm deep new water can be injected and 20 kg-30 kg of lime can be splashed into the water per acre. When the water quality is lean, appropriate decomposition of organic fertilizer is applied to maintain the medium-grade fertilizer quality. The water quality transparency is preferably 30 to 40 cm.
IV. Feeding and fertilizing Science fish should mainly perform the following two tasks when they eat:
1. Fertilization: 7 days before the lower seedlings of the fish seedlings (3 days after the clear pond is sterilized), Mushi 250 kg~350 kgs of human feces and urine that have been fermented and fermented, or 2.5 kg of urea and 5 kg of calcium perchlorate , cultivate plankton so that there is plenty of natural food behind the pond.
2. Feeding: timely feeding of nutritious artificial compound feeds to enhance the body composition of fish and accelerate their growth. When the surface temperature of the fish ponds rises to about 10°C, the fish begin to eat small amounts of food and they sometimes have large food intake. If there are multiple small areas of muddy water appearing on the bottom of the pool and fish activities are frequent, then the fish are in a state of starvation. The specific practice of opening food is: when the surface water temperature of the fish pond reaches 3°C, feed once a week; when the water temperature of the surface of the fish pond rises to 10°C in sunny weather, it is necessary to feed it once a day or every other day. Each feeding amount is about 1/6 of the feeding amount in summer and autumn, or 3 hours to 5 hours. At the same time, it can be introduced and domesticated. The method is:
First use 3 days to 5 days to sprinkle a small amount of fine material on the edge of the food table near the pool to lure, and then gradually reduce the spread range, until the designated feeding on the table, which can improve food utilization.
Fifth, fish disease prevention and control should pay attention to fish, such as long-term hunger, will cause growth stagnation, increased disease. Therefore, strengthening the early feeding and management of fish is an effective way to increase fish disease resistance. We must implement the principle of “prevention from prevention and combination of prevention and treatmentâ€. In the spring of each spring, 20 kilograms of quicklime should be sprinkled with water to adjust the water quality, enhance the buffer capacity of the water body, or be disinfected and sterilized with 1ppm bleaching powder. If parasites occur, 0.7ppm copper sulphate and ferrous sulphate (5:2) water can be spilled to give the fish a good ecological environment. In addition, when the fish pond is filled with water in early spring, it should be injected as much as possible into the winter water storage. Because of this small number of water-borne pathogens, it is beneficial to reduce the occurrence of fish diseases. The fish disease that often occurs in spring fish ponds is mainly watery mildew. This is a fungal disease. It is caused by injury caused by careless operation in management. Salt and baking soda mixture can be used, Quanchiposa or dipping fish to prevent and control. In addition, worms such as trichophae and parasitosis also occur from time to time, and can be treated with 0.7ppm copper sulfate and ferrous sulfate (5:2) mixture, and Quanchiposa.
First, stocking of fish ponds should be based on local food and water quality conditions to determine the main breeding species. If grasses and dry grass are abundant, grass carp and carp should be raised. If the fat source is sufficient, you can raise squid, squid, squid, and tilapia. The area where there are many snails and clams can raise herring and mackerel. The amount of stocking depends on the conditions of the pond and the level of feeding and management. Intensive culture of fish ponds generally put 1,500 to 2,000 tails per acre, and rough fish ponds have 500 to 1,000 tails per acre. In the stocking process, the following levels should be considered:
1. Clearance of clear ponds. The pond must be thoroughly rectified before stocking. Pumping dry ponds, removing excess silt, repairing pond bases, entering and exiting sluice gates, and providing a good growing environment for farmed fish. After that, 100kg of lime and 60kg of tea bran were used for the mu, and the whole pool was splashed with water after breaking and soaking for 48 hours. The role of quick lime in addition to kill wild fish and pathogens in vitro, but also improve the soil, and acidity. While tea bran can cultivate plankton-rich plankton, the disappearance of medicinal properties is also a nutritious feed for fish seedlings.
2. Disinfection of fingerlings. Disinfection of fingerlings is a practical and effective method of cutting off pathogens and preventing fish diseases. Before the fish species is under the pond, it should be washed with 10ppm bleaching powder or 8ppm copper sulfate for about 20 minutes, or the two drugs can be used simultaneously. If the above-mentioned drugs are lacking in remote mountain areas, fish bodies can be soaked with 4% saline solution for 20-30 minutes, and the disinfection effect is also good.
3. Fish species rearing. The stocking of fingerlings should be selected when the weather is high on sunny days. Avoid rain, snow, and windy weather. The place of stocking should be chosen to be sheltered from the wind and place fish containers (pots, buckets, etc.) into the water so that they can slowly tilt and allow the fry to swim into the pond.
Second, raise the water temperature in a timely manner within the appropriate temperature range, the fish will increase food intake as the water temperature rises, and accelerate growth. Therefore, the water level of fish ponds in early spring should be controlled at 0.6 to 0.8 meters, so that the water temperature can be raised quickly to facilitate the full play of the fertilizer effect and promote the fish to eat earlier. After the spring, inject water. When adding new water, do not inject a large amount of water each time, so as to prevent the temperature from dropping. At the same time, appropriate organic fertilizers should be applied to improve the water temperature. In case of continuous rainy weather, the depth of pool water should be increased to prevent the water temperature in the pool from changing too much.
Third, the water quality adjustment should be suitable after the spring, as the temperature, water temperature gradually rise, the fish's biological feed began a large number of breeding. If water quality is found to be aging and acidic, 20 cm deep new water can be injected and 20 kg-30 kg of lime can be splashed into the water per acre. When the water quality is lean, appropriate decomposition of organic fertilizer is applied to maintain the medium-grade fertilizer quality. The water quality transparency is preferably 30 to 40 cm.
IV. Feeding and fertilizing Science fish should mainly perform the following two tasks when they eat:
1. Fertilization: 7 days before the lower seedlings of the fish seedlings (3 days after the clear pond is sterilized), Mushi 250 kg~350 kgs of human feces and urine that have been fermented and fermented, or 2.5 kg of urea and 5 kg of calcium perchlorate , cultivate plankton so that there is plenty of natural food behind the pond.
2. Feeding: timely feeding of nutritious artificial compound feeds to enhance the body composition of fish and accelerate their growth. When the surface temperature of the fish ponds rises to about 10°C, the fish begin to eat small amounts of food and they sometimes have large food intake. If there are multiple small areas of muddy water appearing on the bottom of the pool and fish activities are frequent, then the fish are in a state of starvation. The specific practice of opening food is: when the surface water temperature of the fish pond reaches 3°C, feed once a week; when the water temperature of the surface of the fish pond rises to 10°C in sunny weather, it is necessary to feed it once a day or every other day. Each feeding amount is about 1/6 of the feeding amount in summer and autumn, or 3 hours to 5 hours. At the same time, it can be introduced and domesticated. The method is:
First use 3 days to 5 days to sprinkle a small amount of fine material on the edge of the food table near the pool to lure, and then gradually reduce the spread range, until the designated feeding on the table, which can improve food utilization.
Fifth, fish disease prevention and control should pay attention to fish, such as long-term hunger, will cause growth stagnation, increased disease. Therefore, strengthening the early feeding and management of fish is an effective way to increase fish disease resistance. We must implement the principle of “prevention from prevention and combination of prevention and treatmentâ€. In the spring of each spring, 20 kilograms of quicklime should be sprinkled with water to adjust the water quality, enhance the buffer capacity of the water body, or be disinfected and sterilized with 1ppm bleaching powder. If parasites occur, 0.7ppm copper sulphate and ferrous sulphate (5:2) water can be spilled to give the fish a good ecological environment. In addition, when the fish pond is filled with water in early spring, it should be injected as much as possible into the winter water storage. Because of this small number of water-borne pathogens, it is beneficial to reduce the occurrence of fish diseases. The fish disease that often occurs in spring fish ponds is mainly watery mildew. This is a fungal disease. It is caused by injury caused by careless operation in management. Salt and baking soda mixture can be used, Quanchiposa or dipping fish to prevent and control. In addition, worms such as trichophae and parasitosis also occur from time to time, and can be treated with 0.7ppm copper sulfate and ferrous sulfate (5:2) mixture, and Quanchiposa.
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