The name of the American frog is Marsh Green Frog, belonging to the genus Amphibia, Anura, Ranidae, and Rana. The small earthen pond intensive trophy American frog has the advantages of small area, high yield, easy management of diseases, and easy access to the market. The economic benefits of farming are considerable. The key techniques for breeding American frogs in small earthen ponds are summarized below.
How to build a small earthen pond 1. Select a plot to choose a quiet environment, from the farmhouse more than 200 meters, fresh water, adequate water, medium fertility, strong water retention performance, convenient injection and drainage of the field, the best choice near the rivers, reservoirs, ditches Field blocks.
2. The frog farm that excavates the frog pond and breeds its own frog farm must have a pro-frog pool (and spawning pond), a pond, a domestication pool, a frog, and a rearing pool. The pro-frog pool is generally 15-20m2 in area, water depth is 30-40cm, water-land ratio is 1:1, and 8 to 10 groups of pro-family frogs can be stocked, and 1/3 area shelter can be built. The water surface of Dianchi Lake has a width of 1.4m, a width of 0.7m and a water depth of 40~50cm. The length is suitable for the local conditions, and the ratio of water to land is approximately 1:1. The juvenile frog domestication pool is similar to Dianchi Lake, and may be slightly smaller, with an aspect ratio of 2:1, an area of ​​about 10-15 m2, and a water depth of 20-30 cm. The frogs and rearing ponds are similar to Dianchi Lake. The water level is slightly shallow and the land area can be slightly larger.
3. Construction of feedstuffs Each pool will be equipped with 1 to 2 feedstuffs to serve as feed and habitat for American frogs. The feed table uses wooden stakes to fix the water, leaving 0.5~1.0cm gaps between the plates for daily cleaning. The height of the feed table top is about 5~6cm with square timber. Dianchi's feed station is not 10~20cm into the water; the feed stand of the frog pond is not immersed in 2~3cm of water, half of the frame is not submerged in water, and the other half is in water, so that the flow of water on the feed table can cause feedstuffs to shake, and it will not Causes feed to drift across the water.
4. Set the water intake system into the water ditch around the field, the drainage ditch excavated in the middle axis of the field, the drainage ditch arranged in sequence on both sides of the pool. In order to ensure water quality and prevent pollution such as pesticides, a water reservoir of a corresponding area can be constructed depending on the amount of water used at the water source.
5. Construction of anti-escape nets The use of 10 cm wide, dense-eye polyethylene nets or nylon sieves can be used for 2 to 3 years. The specific practice of fences is to hit 1 pile every 1 to 2 meters and then enclose the nets as a defensive barrier. The fence should be buried 10cm.
How to increase the hatching rate 1. After harvesting the high-quality pro-frog late rice, dig a small earthen pond. Eight to ten groups of excellent pro-frogs were introduced in the pro-frog pool, and 1:1 spawning was performed. For the first year of spring spawning and hatching, it is required to select the frogs with a body weight of about 500 g or more and require the pro-frogs to be sturdy, lively, disease-free, harmless, and have good gonadal development. At the same time, care should be taken to avoid inbreeding.
2. Production and use Incubation cages Incubation cages are made of 50-mesh nylon sieves and are made of rectangular cages. The specifications are 1.0 meters long, 0.5 meters wide and 0.8 meters high. The box is suspended on the frame, the cage floats on the surface of the water, the box enters the water 20 to 30 cm, and the box is separated from the bottom of the tank to prevent contamination of the bottom sludge. The cages are arranged in "crystal" in the hatchery and fixed with wooden stakes. Each hatched 1 female pro-frog produced eggs, about 9000 to 10000 tablets. A layer of 5 to 10 cm non-toxic and unstained green grass is laid inside the cage to allow the eggs to be incubated.
3. Collection of eggs American frogs spawn in the southern region from the end of April to mid-May, with a water temperature of 18 to 23°C and an optimal water temperature of 25 to 27°C. American frogs are fertilized in vitro, and mating usually takes 1 to 2 days, and as many as 3 days. Spawning usually starts at dawn and ends at 9 a.m. After a few minutes of egg production, they become colloidal beads, and they are quickly transferred to hatch cages for hatching. Place the eggs on top of the incubator and keep the eggs on the surface of the incubator. Pay attention to the direction of the eggs and turn them upside down to the bottom of the pool. If the direction is incorrect, the hatching rate will be seriously affected.
4. During the incubation process, ensure that the water is clear and there is sufficient dissolved oxygen. The water in the hatchery can be dropped or injected into the pool to increase the dissolved oxygen in the pool water.
5. Timely withdraw from the box just hatched quail rely on yolk sac to provide nutrition, hatch 2 to 3 days after the start of feeding the egg yolk filtrate, 10,000 oysters per day feeding yolk 1-2, egg yolk plus water 1 ~ 2kg made filter Suspensions were fed and fed one at a time in the morning and in the evening. Normally hatching quails were carefully reared after half a month in the incubator and they were free to feed. The larvae were then counted and transferred to Dianchi Lake.
How to improve the survival rate of pupa 1. Qingchi disinfection 10-15 days before the pupa stocking, disinfect with quicklime water, dry the sun every year in the dry pool, cold and cold, to eliminate pathogens.
2. Fertilizer ponds are stocked for 5 to 7 days before stocking, applying fermented and decomposed organic fertilizer 1.2 to 1.5 kg/m2 to cultivate natural basal feed organisms, and to make ponds for manure applications.
3. Reasonable stocking After 16 days of age, the cockroaches have been able to feed freely, and the stocking density is preferably 1000/m2. After that, the growth conditions of the cockroaches are appropriately sparse. In order to ensure that the water quality, dissolved oxygen, and other conditions meet the requirements of the mutated metamorphosis, the stocking density before the metamorphosis is 100-300/m2.
4. Scientifically feeding the pupal stage, the crude protein content of feed shall not be less than 45%. In the south, from the end of April to mid-May, about 70 to 80 days after the hatching, the hatching hatch in September will be prolonged until April of the following year. Some farmers use flour, corn flour and fish meal mix to feed quails. Although the cost can be reduced, the growth time is as long as 80 to 90 days. The use of full-priced compound feed can shorten the growth time. At the early stage (16-45 days old), it is fed with full-price alfalfa powder, and after 45-day-old, it is fed with floating granular material. Feeding should adhere to the principle of "Four Sets". Feeding should be done within 1 to 2 hours. Do not overfeed to avoid bloating and death. The pellets need to be softened. 1kg of pellets is mixed and soaked with 0.3kg of clean water and soaked for 10 minutes. The feed is softened and then fed again to prevent the feed from scratching the intestine and ingesting the dirty water. Different batches of eggs hatch out of the cockroaches to be kept separately, so that the cockroach metamorphosis is controlled at the same time, keeping the specifications neat.
How to increase the survival rate of metamorphosis Before the metamorphosis, the lateral elbow joint protrudes, the abdomen shrinks, the body is thin, and it stops feeding. When the juvenile metamorphosis of juvenile larvae landing ashore, every day to capture in time, collected and placed in the juvenile frog domestication pool carefully domesticated, this phase of the management of the most critical, can improve the survival rate. The newly metamorphosed juvenile frog has poor sense of smell and depends mainly on visual feeding. It only feeds on live animals and must therefore feed live baits. The domestication process requires patience and requires multiple inductions. After feeding for 3 days live baits, the ratio of live bait and full-price compound feed is 1:1. The size of the full-price compound feed is appropriate to be swallowed by juvenile frogs, and gradually increase the proportion of full-price compound feed. Until all feed formula feed.
How to comprehensively prevent and treat diseases and predators in the United States in the process of frogs, frogs and frogs in the breeding process, disease prevention and control should implement the "prevention-based, prevention-oriented" approach. During the flood season, there are mainly diseases such as water mold, enteritis, air bubbles, and worms. The frogs and frogs mainly have red legs, rotten skin, enteritis, ascites and other diseases. When a disease occurs, except for symptomatic application, the focus should be Do the following prevention work.
1. Pay attention to the clear pond, use clear water to clear the pond, generally use 200~500ppm whole pond to sterilize.
2. Carry out water body and frog body disinfection once every 15 to 20 days. Disinfect the pool with copper sulfate 0.5g/m2 and ferrous sulfate 0.2g/m2 mixture Quanchiposa, frog body disinfection with 7ppm potassium permanganate soak Frog body for 20 minutes.
How to build a small earthen pond 1. Select a plot to choose a quiet environment, from the farmhouse more than 200 meters, fresh water, adequate water, medium fertility, strong water retention performance, convenient injection and drainage of the field, the best choice near the rivers, reservoirs, ditches Field blocks.
2. The frog farm that excavates the frog pond and breeds its own frog farm must have a pro-frog pool (and spawning pond), a pond, a domestication pool, a frog, and a rearing pool. The pro-frog pool is generally 15-20m2 in area, water depth is 30-40cm, water-land ratio is 1:1, and 8 to 10 groups of pro-family frogs can be stocked, and 1/3 area shelter can be built. The water surface of Dianchi Lake has a width of 1.4m, a width of 0.7m and a water depth of 40~50cm. The length is suitable for the local conditions, and the ratio of water to land is approximately 1:1. The juvenile frog domestication pool is similar to Dianchi Lake, and may be slightly smaller, with an aspect ratio of 2:1, an area of ​​about 10-15 m2, and a water depth of 20-30 cm. The frogs and rearing ponds are similar to Dianchi Lake. The water level is slightly shallow and the land area can be slightly larger.
3. Construction of feedstuffs Each pool will be equipped with 1 to 2 feedstuffs to serve as feed and habitat for American frogs. The feed table uses wooden stakes to fix the water, leaving 0.5~1.0cm gaps between the plates for daily cleaning. The height of the feed table top is about 5~6cm with square timber. Dianchi's feed station is not 10~20cm into the water; the feed stand of the frog pond is not immersed in 2~3cm of water, half of the frame is not submerged in water, and the other half is in water, so that the flow of water on the feed table can cause feedstuffs to shake, and it will not Causes feed to drift across the water.
4. Set the water intake system into the water ditch around the field, the drainage ditch excavated in the middle axis of the field, the drainage ditch arranged in sequence on both sides of the pool. In order to ensure water quality and prevent pollution such as pesticides, a water reservoir of a corresponding area can be constructed depending on the amount of water used at the water source.
5. Construction of anti-escape nets The use of 10 cm wide, dense-eye polyethylene nets or nylon sieves can be used for 2 to 3 years. The specific practice of fences is to hit 1 pile every 1 to 2 meters and then enclose the nets as a defensive barrier. The fence should be buried 10cm.
How to increase the hatching rate 1. After harvesting the high-quality pro-frog late rice, dig a small earthen pond. Eight to ten groups of excellent pro-frogs were introduced in the pro-frog pool, and 1:1 spawning was performed. For the first year of spring spawning and hatching, it is required to select the frogs with a body weight of about 500 g or more and require the pro-frogs to be sturdy, lively, disease-free, harmless, and have good gonadal development. At the same time, care should be taken to avoid inbreeding.
2. Production and use Incubation cages Incubation cages are made of 50-mesh nylon sieves and are made of rectangular cages. The specifications are 1.0 meters long, 0.5 meters wide and 0.8 meters high. The box is suspended on the frame, the cage floats on the surface of the water, the box enters the water 20 to 30 cm, and the box is separated from the bottom of the tank to prevent contamination of the bottom sludge. The cages are arranged in "crystal" in the hatchery and fixed with wooden stakes. Each hatched 1 female pro-frog produced eggs, about 9000 to 10000 tablets. A layer of 5 to 10 cm non-toxic and unstained green grass is laid inside the cage to allow the eggs to be incubated.
3. Collection of eggs American frogs spawn in the southern region from the end of April to mid-May, with a water temperature of 18 to 23°C and an optimal water temperature of 25 to 27°C. American frogs are fertilized in vitro, and mating usually takes 1 to 2 days, and as many as 3 days. Spawning usually starts at dawn and ends at 9 a.m. After a few minutes of egg production, they become colloidal beads, and they are quickly transferred to hatch cages for hatching. Place the eggs on top of the incubator and keep the eggs on the surface of the incubator. Pay attention to the direction of the eggs and turn them upside down to the bottom of the pool. If the direction is incorrect, the hatching rate will be seriously affected.
4. During the incubation process, ensure that the water is clear and there is sufficient dissolved oxygen. The water in the hatchery can be dropped or injected into the pool to increase the dissolved oxygen in the pool water.
5. Timely withdraw from the box just hatched quail rely on yolk sac to provide nutrition, hatch 2 to 3 days after the start of feeding the egg yolk filtrate, 10,000 oysters per day feeding yolk 1-2, egg yolk plus water 1 ~ 2kg made filter Suspensions were fed and fed one at a time in the morning and in the evening. Normally hatching quails were carefully reared after half a month in the incubator and they were free to feed. The larvae were then counted and transferred to Dianchi Lake.
How to improve the survival rate of pupa 1. Qingchi disinfection 10-15 days before the pupa stocking, disinfect with quicklime water, dry the sun every year in the dry pool, cold and cold, to eliminate pathogens.
2. Fertilizer ponds are stocked for 5 to 7 days before stocking, applying fermented and decomposed organic fertilizer 1.2 to 1.5 kg/m2 to cultivate natural basal feed organisms, and to make ponds for manure applications.
3. Reasonable stocking After 16 days of age, the cockroaches have been able to feed freely, and the stocking density is preferably 1000/m2. After that, the growth conditions of the cockroaches are appropriately sparse. In order to ensure that the water quality, dissolved oxygen, and other conditions meet the requirements of the mutated metamorphosis, the stocking density before the metamorphosis is 100-300/m2.
4. Scientifically feeding the pupal stage, the crude protein content of feed shall not be less than 45%. In the south, from the end of April to mid-May, about 70 to 80 days after the hatching, the hatching hatch in September will be prolonged until April of the following year. Some farmers use flour, corn flour and fish meal mix to feed quails. Although the cost can be reduced, the growth time is as long as 80 to 90 days. The use of full-priced compound feed can shorten the growth time. At the early stage (16-45 days old), it is fed with full-price alfalfa powder, and after 45-day-old, it is fed with floating granular material. Feeding should adhere to the principle of "Four Sets". Feeding should be done within 1 to 2 hours. Do not overfeed to avoid bloating and death. The pellets need to be softened. 1kg of pellets is mixed and soaked with 0.3kg of clean water and soaked for 10 minutes. The feed is softened and then fed again to prevent the feed from scratching the intestine and ingesting the dirty water. Different batches of eggs hatch out of the cockroaches to be kept separately, so that the cockroach metamorphosis is controlled at the same time, keeping the specifications neat.
How to increase the survival rate of metamorphosis Before the metamorphosis, the lateral elbow joint protrudes, the abdomen shrinks, the body is thin, and it stops feeding. When the juvenile metamorphosis of juvenile larvae landing ashore, every day to capture in time, collected and placed in the juvenile frog domestication pool carefully domesticated, this phase of the management of the most critical, can improve the survival rate. The newly metamorphosed juvenile frog has poor sense of smell and depends mainly on visual feeding. It only feeds on live animals and must therefore feed live baits. The domestication process requires patience and requires multiple inductions. After feeding for 3 days live baits, the ratio of live bait and full-price compound feed is 1:1. The size of the full-price compound feed is appropriate to be swallowed by juvenile frogs, and gradually increase the proportion of full-price compound feed. Until all feed formula feed.
How to comprehensively prevent and treat diseases and predators in the United States in the process of frogs, frogs and frogs in the breeding process, disease prevention and control should implement the "prevention-based, prevention-oriented" approach. During the flood season, there are mainly diseases such as water mold, enteritis, air bubbles, and worms. The frogs and frogs mainly have red legs, rotten skin, enteritis, ascites and other diseases. When a disease occurs, except for symptomatic application, the focus should be Do the following prevention work.
1. Pay attention to the clear pond, use clear water to clear the pond, generally use 200~500ppm whole pond to sterilize.
2. Carry out water body and frog body disinfection once every 15 to 20 days. Disinfect the pool with copper sulfate 0.5g/m2 and ferrous sulfate 0.2g/m2 mixture Quanchiposa, frog body disinfection with 7ppm potassium permanganate soak Frog body for 20 minutes.
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