Fish pond bioaerobic technology
2018-06-06 02:00:13
Fish pond bioaerobic technology is a new technology suitable for wintering pond fish. Studies have shown that compared with conventional pond fish overwintering technology, the survival rate of fingerlings can be increased from 50% to 80%, the fish density can be increased from 0.25 kg per cubic meter of water to 0.5 kg, and the management fee can be reduced from 70 yuan to 30 yuan per mu. . The technical operation method is as follows:
First, choose a winter pond over the winter pool area requirements 5 to 20 acres, generally about 1O acres is appropriate. Depth requires that the depth of water below 2 meters is a deep pool; 1.5 meters is a shallow pool; but the effective water depth should not be less than 1 meter. Ponds with lush grasses in the Ming dynasty and ponds with excessive organic matter and severe leakage are not suitable for wintering ponds. Half a month before the fish is released, the pool water should be drained and aired for about one week to promote solidification of the sediment. At the same time, 50-75 kilograms of quicklime per acre should be spilled and disinfected.
Second, adjust the quality of water into the old pond fertilizer, is conducive to a large number of algae breeding oxygen. In general deep pools, one-third of the total amount of old pond water is injected into the pond; Then, 15 to 25 kilograms of lime are poured per acre, and 1 ppm of bleaching powder is spilled. Finally, fill the wintering pool with water from rivers and reservoirs.
Third, a reasonable stocking deep pool 0.3 cubic meters of water per cubic meter of fish, fish shallow pond 0.5 ~ 0.6 kg. Before entering the pond, fish species should be sanitized with 3 to 5% salt water.
Fourth, the fertilization method under the ice fertilizer, can speed up the reproduction of phytoplankton and increase its oxygen production capacity. The shallow pool starts fertilizing one month after the ice is closed, and the deep pool can be later. Fertilization adopts the bagging method under the ice, applying 4 to 5 grams of sodium sulfate per cubic meter of water, 2 to 3 grams of superphosphate, and 1 to 2 doses per month.
V. Control of zooplankton in hostile water bodies, such as rotifers and sword leeches, etc., consumes very severe oxygen and is a major factor in damaging the overwintering of fish. Therefore, if the amount of underwater zooplankton is found to be too high, the trichlorfon must be promptly spoiled and the drug concentration is 2ppm.
VI. Daily management The timely removal of snow from the ice area is the key to improving the oxygenation capacity of organisms. For ponds with an area under 10 mu, it is better to sweep away the snow; the large area should be over 80%. In addition, during the winter, we must pay attention to maintaining the depth of the pond, with a small amount of fresh water on a regular basis as well, and avoid a lot of water at one time, so as not to inhibit the reproduction of phytoplankton.
First, choose a winter pond over the winter pool area requirements 5 to 20 acres, generally about 1O acres is appropriate. Depth requires that the depth of water below 2 meters is a deep pool; 1.5 meters is a shallow pool; but the effective water depth should not be less than 1 meter. Ponds with lush grasses in the Ming dynasty and ponds with excessive organic matter and severe leakage are not suitable for wintering ponds. Half a month before the fish is released, the pool water should be drained and aired for about one week to promote solidification of the sediment. At the same time, 50-75 kilograms of quicklime per acre should be spilled and disinfected.
Second, adjust the quality of water into the old pond fertilizer, is conducive to a large number of algae breeding oxygen. In general deep pools, one-third of the total amount of old pond water is injected into the pond; Then, 15 to 25 kilograms of lime are poured per acre, and 1 ppm of bleaching powder is spilled. Finally, fill the wintering pool with water from rivers and reservoirs.
Third, a reasonable stocking deep pool 0.3 cubic meters of water per cubic meter of fish, fish shallow pond 0.5 ~ 0.6 kg. Before entering the pond, fish species should be sanitized with 3 to 5% salt water.
Fourth, the fertilization method under the ice fertilizer, can speed up the reproduction of phytoplankton and increase its oxygen production capacity. The shallow pool starts fertilizing one month after the ice is closed, and the deep pool can be later. Fertilization adopts the bagging method under the ice, applying 4 to 5 grams of sodium sulfate per cubic meter of water, 2 to 3 grams of superphosphate, and 1 to 2 doses per month.
V. Control of zooplankton in hostile water bodies, such as rotifers and sword leeches, etc., consumes very severe oxygen and is a major factor in damaging the overwintering of fish. Therefore, if the amount of underwater zooplankton is found to be too high, the trichlorfon must be promptly spoiled and the drug concentration is 2ppm.
VI. Daily management The timely removal of snow from the ice area is the key to improving the oxygenation capacity of organisms. For ponds with an area under 10 mu, it is better to sweep away the snow; the large area should be over 80%. In addition, during the winter, we must pay attention to maintaining the depth of the pond, with a small amount of fresh water on a regular basis as well, and avoid a lot of water at one time, so as not to inhibit the reproduction of phytoplankton.