1. Strictly choose to keep broodstock. Choose natural origin, require health, good gonadal development. More than 6Kg of weight carp, more than 10Kg of carp, more than 15Kg of carp, more than 8Kg of grass carp. The broodstock's annual turnover rate should reach about 10%.
2, scientific clear the fish pond. The pro-fish pond should be easily drained and drained. There should be a 20-cm deep mud at the bottom of the carp and carp ponds. The bottom of the grass and grass carp pools should have little or no silt. An area of ​​1-5 acres, water depth of 1.5 meters. The pool should be cleared before stocking.
3, reasonable with stocking. The squid-dominated ponds use 3 to 4 fins per mu for carp and grass carp; the main squid pool uses 6 to 8 tails for raising grass carp; the pond for main octopus uses squid and grass carp Each of the 2-3 tails; the main pool of grass carp, acres of mullet or carp 3-5. The proportion of males, females, brooders, and broodstock is generally 1?1-1.5. At the same time, 8-10 squid and about 150 squid calyx are stocked per acre to control the breeding of wild fish and large zooplankton.
4, strengthen feeding and management. Before stocking, the broth and squid brooding ponds should put in 500-700 kg of decomposed organic fertilizer per acre to cultivate plankton, and fertilize it later. In addition, sunny and warm weather should be fed bean cake to promote gonadal development. Herring broodstock is mainly fed with snails and oysters, supplemented with bean cake and other fine ingredients. Grass broodstock is dominated by green grass, ryegrass, hawthorn vines and other green materials, supplemented by fine material. If spring and autumn grass are insufficient, fine material is required. In order to keep the water fresh, fall water should be diligently applied in autumn, and in winter, the water depth should be more than 1.5 meters.
5, pay attention to appropriate early production. Determination of urine production date: After the weather warms, the minimum water temperature in the morning is stable above 18°C ​​for 3 consecutive days, and it is more appropriate when there is no strong cold air attack. Mature broodstock appearance characteristics: female abdomen inflated, the fulminate hole on both sides of the full, soft and elastic, reproductive hole relaxation, grass carp at the same time the abdominal scales loose, abdomen midline concave, ovary fall, there are like moving, oxytocin effect is good. The male fish can squeez out milky white semen and can be used when the water is spread. Normal females inject oxytocin chemotactic hormone 1,000 IU per kilogram body weight, or LRH-A 40-50 micrograms; males halved.
6, optimize the incubation process. The hatching water should be filtered with a filter to prevent the entry of floating debris and wild fish. Before each incubation, clean the hatching tank and hatching tank, provide suitable water flow during incubation, and diligently flip the water to check whether there are any accumulated egg seedlings in the bottom corner and clean it in time to maintain the water quality.
7, comprehensive prevention and treatment of fish disease. Professions of fish diseases in broodstock breeding are mainly based on the use of 0.4ppm crystal trichlorfon per year to prevent parasites in spring and autumn, and 30ppm quicklime or 1ppm bleach per month for prevention of bacterial diseases from April to October. . Once you find a fish disease, actively remedy the problem and cure it as soon as possible.
2, scientific clear the fish pond. The pro-fish pond should be easily drained and drained. There should be a 20-cm deep mud at the bottom of the carp and carp ponds. The bottom of the grass and grass carp pools should have little or no silt. An area of ​​1-5 acres, water depth of 1.5 meters. The pool should be cleared before stocking.
3, reasonable with stocking. The squid-dominated ponds use 3 to 4 fins per mu for carp and grass carp; the main squid pool uses 6 to 8 tails for raising grass carp; the pond for main octopus uses squid and grass carp Each of the 2-3 tails; the main pool of grass carp, acres of mullet or carp 3-5. The proportion of males, females, brooders, and broodstock is generally 1?1-1.5. At the same time, 8-10 squid and about 150 squid calyx are stocked per acre to control the breeding of wild fish and large zooplankton.
4, strengthen feeding and management. Before stocking, the broth and squid brooding ponds should put in 500-700 kg of decomposed organic fertilizer per acre to cultivate plankton, and fertilize it later. In addition, sunny and warm weather should be fed bean cake to promote gonadal development. Herring broodstock is mainly fed with snails and oysters, supplemented with bean cake and other fine ingredients. Grass broodstock is dominated by green grass, ryegrass, hawthorn vines and other green materials, supplemented by fine material. If spring and autumn grass are insufficient, fine material is required. In order to keep the water fresh, fall water should be diligently applied in autumn, and in winter, the water depth should be more than 1.5 meters.
5, pay attention to appropriate early production. Determination of urine production date: After the weather warms, the minimum water temperature in the morning is stable above 18°C ​​for 3 consecutive days, and it is more appropriate when there is no strong cold air attack. Mature broodstock appearance characteristics: female abdomen inflated, the fulminate hole on both sides of the full, soft and elastic, reproductive hole relaxation, grass carp at the same time the abdominal scales loose, abdomen midline concave, ovary fall, there are like moving, oxytocin effect is good. The male fish can squeez out milky white semen and can be used when the water is spread. Normal females inject oxytocin chemotactic hormone 1,000 IU per kilogram body weight, or LRH-A 40-50 micrograms; males halved.
6, optimize the incubation process. The hatching water should be filtered with a filter to prevent the entry of floating debris and wild fish. Before each incubation, clean the hatching tank and hatching tank, provide suitable water flow during incubation, and diligently flip the water to check whether there are any accumulated egg seedlings in the bottom corner and clean it in time to maintain the water quality.
7, comprehensive prevention and treatment of fish disease. Professions of fish diseases in broodstock breeding are mainly based on the use of 0.4ppm crystal trichlorfon per year to prevent parasites in spring and autumn, and 30ppm quicklime or 1ppm bleach per month for prevention of bacterial diseases from April to October. . Once you find a fish disease, actively remedy the problem and cure it as soon as possible.
Fuzhou Contay Biotechnology Co., Ltd is selling PQQ, PQQ Disodium Slat, Vitamin K2 MK7, Folic Acid, Co-Q10.
Dietary Supplement and Food additives
Pyrroloquinoline Quinone,Pqq Acid,PQQ disodium salt, Vitamin K2 MK7
Fuzhou Contay Biotechnology Co., Ltd , https://www.contaybio.com