Xiangyunjing is a triploid type fish that was developed using the combination of cell engineering and sexual hybridization combined by the Institute of Biology of Hunan Normal University. It has fast growth, wide appetite, strong disease resistance, low temperature resistance, and low dissolved oxygen. With the characteristics of high catch rate, infertility, tender meat quality and good body shape, it is an excellent variety for freshwater aquaculture.
I. Pond Conditions The fry cultivation pool area is from 1000m2 to 1500m2, with a water depth of 1.0m--1.2m, and the shape is preferably a rectangle. The bottom of the pool is required to be flat, the levee is strong and does not leak water, and the inlet and outlet conditions are good, and a strainer is installed at the inlet and outlet. Seed cultivation ponds are preferably ponds with concrete slabs or red brick slopes around the pond.
Second, before the preparation of stocking fish ponds before the pond 20 days - 30 days to clear the pond. The pool water shall be drained to remove weeds and silt from the bottom of the pond, and part of the silt will be piled under the embankment to be used for repairing the dam. If there is any damage or evidence of seepage, the slope protection pond shall be repaired. The clear ponds can be cleaned with quicklime or bleaching powder 7 days before the seedlings are released - at a pond depth of 6cm - 10cm, the dosage is: quicklime 60kg/mu - 75kg/mu or bleaching powder 6kg/mu - 8kg/mu until After the efficacy disappears, the pond can be filled with new water. In the 4 days to 5 days before the fry in the pond, 200kg/mu--300kg/mu of fermented cow dung or pig manure is used as a base fertilizer to ensure the water quality of the fry and ensure that there are enough food organisms in the water when the fry hatches. In addition, a day before the fish ponds under the pond, a small amount of fish need to be used to test the water by filling a suitable amount of water from a pond with a plastic bucket and putting in a certain amount of fry for 4 hours to 5 hours. If the fry is normal, Prove that the water quality is good for planting seedlings.
Third, when stocking fish ponds, the water temperature in the cultivation pool should be basically the same as the temperature in the hatchery pool. Since Xiangyunjing is produced in Hunan, the water purchased in the field has long-distance transportation and differences in the climate between regions, the water temperature is quite different. Therefore, the nylon bag filled with water must be soaked in the pond for 20 minutes when it is released - 30 Minutes, until the water temperature inside and outside the nylon bag is basically the same when you can put seedlings. The stocking density should be 200,000/mu, and the depth of water should be 0.6m--0.7m. In addition, the release of seedlings must be carried out when the weather is good. If continuous rainy weather occurs after the seedlings are released, it will have a great impact on the survival rate of fry.
Fourth, rearing and management of fish ponds after the need to feed soybean milk, feeding the amount of: Each time every million fry with soybeans 3kg--4kg ground into 50kg of soy milk; feeding frequency - days 2 times; feeding When you want to soak the milk evenly around the pond. After feeding for 4 days to 5 days, the amount of feeding can be appropriately increased or decreased according to the water color, and the water injection should be performed in stages to maintain the transparency of the water body at 25cm - 30cm. Usually every 3 days - 5 days water injection, each injection depth of 5cm - 8cm, and gradually increase the pond water level to 1.0m - 1.2m.
In day-to-day management, it is necessary to stick to the morning and the evening to inspect the ponds, observe the changes in fish activity and water quality, and promptly find and solve the problems that arise during feeding. At the same time, keep the pond clean and hygienic, and remove the dirt and frog eggs from the pond at any time, and pay attention to the prevention and control of enemy creatures, especially water snakes and lobsters.
After 15 days of careful feeding, when the fry body length to 1.5cm - 2.0cm, you can pull the net to exercise, usually in the sunny morning. When the net is pulled for the first time, the speed of the net cloth is slow, and pay attention to whether the fry is affixed to the net or not. When the net is collected, the fry time is shorter. After 2 to 3 times of training, the fry has enhanced physical fitness and can adapt to high-density environment and short-distance transportation. For long-distance transport of fry, the “floating water†is required. The fry is placed in a cage that is used exclusively for hanging ponds. After a dense night, it can be shipped the next morning.
Pan Tingshuang Hu Xianjiang Hou Jianjun Jiang Yelin Fisheries Research Institute, Anhui Academy of Agricultural Sciences 230031
I. Pond Conditions The fry cultivation pool area is from 1000m2 to 1500m2, with a water depth of 1.0m--1.2m, and the shape is preferably a rectangle. The bottom of the pool is required to be flat, the levee is strong and does not leak water, and the inlet and outlet conditions are good, and a strainer is installed at the inlet and outlet. Seed cultivation ponds are preferably ponds with concrete slabs or red brick slopes around the pond.
Second, before the preparation of stocking fish ponds before the pond 20 days - 30 days to clear the pond. The pool water shall be drained to remove weeds and silt from the bottom of the pond, and part of the silt will be piled under the embankment to be used for repairing the dam. If there is any damage or evidence of seepage, the slope protection pond shall be repaired. The clear ponds can be cleaned with quicklime or bleaching powder 7 days before the seedlings are released - at a pond depth of 6cm - 10cm, the dosage is: quicklime 60kg/mu - 75kg/mu or bleaching powder 6kg/mu - 8kg/mu until After the efficacy disappears, the pond can be filled with new water. In the 4 days to 5 days before the fry in the pond, 200kg/mu--300kg/mu of fermented cow dung or pig manure is used as a base fertilizer to ensure the water quality of the fry and ensure that there are enough food organisms in the water when the fry hatches. In addition, a day before the fish ponds under the pond, a small amount of fish need to be used to test the water by filling a suitable amount of water from a pond with a plastic bucket and putting in a certain amount of fry for 4 hours to 5 hours. If the fry is normal, Prove that the water quality is good for planting seedlings.
Third, when stocking fish ponds, the water temperature in the cultivation pool should be basically the same as the temperature in the hatchery pool. Since Xiangyunjing is produced in Hunan, the water purchased in the field has long-distance transportation and differences in the climate between regions, the water temperature is quite different. Therefore, the nylon bag filled with water must be soaked in the pond for 20 minutes when it is released - 30 Minutes, until the water temperature inside and outside the nylon bag is basically the same when you can put seedlings. The stocking density should be 200,000/mu, and the depth of water should be 0.6m--0.7m. In addition, the release of seedlings must be carried out when the weather is good. If continuous rainy weather occurs after the seedlings are released, it will have a great impact on the survival rate of fry.
Fourth, rearing and management of fish ponds after the need to feed soybean milk, feeding the amount of: Each time every million fry with soybeans 3kg--4kg ground into 50kg of soy milk; feeding frequency - days 2 times; feeding When you want to soak the milk evenly around the pond. After feeding for 4 days to 5 days, the amount of feeding can be appropriately increased or decreased according to the water color, and the water injection should be performed in stages to maintain the transparency of the water body at 25cm - 30cm. Usually every 3 days - 5 days water injection, each injection depth of 5cm - 8cm, and gradually increase the pond water level to 1.0m - 1.2m.
In day-to-day management, it is necessary to stick to the morning and the evening to inspect the ponds, observe the changes in fish activity and water quality, and promptly find and solve the problems that arise during feeding. At the same time, keep the pond clean and hygienic, and remove the dirt and frog eggs from the pond at any time, and pay attention to the prevention and control of enemy creatures, especially water snakes and lobsters.
After 15 days of careful feeding, when the fry body length to 1.5cm - 2.0cm, you can pull the net to exercise, usually in the sunny morning. When the net is pulled for the first time, the speed of the net cloth is slow, and pay attention to whether the fry is affixed to the net or not. When the net is collected, the fry time is shorter. After 2 to 3 times of training, the fry has enhanced physical fitness and can adapt to high-density environment and short-distance transportation. For long-distance transport of fry, the “floating water†is required. The fry is placed in a cage that is used exclusively for hanging ponds. After a dense night, it can be shipped the next morning.
Pan Tingshuang Hu Xianjiang Hou Jianjun Jiang Yelin Fisheries Research Institute, Anhui Academy of Agricultural Sciences 230031