Huang Huai is also called squid, long fish, scaleless genus, etc. It is called ageing fish in ancient books and rice squid in foreign countries. Astragalus is a valuable aquatic product that can be eaten and used medicinally. It is a kind of adaptable tropical tropical freshwater fish. In addition to the northwest and southwest parts of the country are distributed. In foreign countries, it is mainly distributed in North Korea, Japan, India, and the Philippines. In recent years, due to the scarcity of sources of Huanghua seedlings, the industrialization of artificial propagation has yet to be further studied. Someone has introduced a fine variety from abroad—the Thai giant yellow cockroach, commonly known as the giant cockroach.
Compared with the local tyrants, the tyrannical magpies have little difference. When they are carefully identifiable, the local pythons are tan-brown and the giant cubs are almost grass green. In the artificial breeding, the giant maggots are flexible and agile in artificial feeding, and they have the characteristics of rapid growth, easy feeding and miscellaneous feeding. Each year, about 2000 eggs are spawned in a very large leap year, and the fertilization rate is 95%, which is higher than that in the local area. From the time of hatching to a length of 1 kilogram, the giant praying mantis takes about 7 months and produces 25 kilograms per square meter. This kind of jaundice is strong against hunger and can be fed for 5 to 7 days without feeding. The largest maggot can grow to 1.5 kilograms, which is 6-7 times that of the local maggots. Its artificial breeding technique is not different from that of local worms. Now it is introduced as follows:
I. Habitat, a fish that is a benthic life, dwells in caves, stays nocturnal, enjoys food, and is resistant to hunger. Astragalus membranaceus is rich in mucous surface, and it is not easy to die after leaving water. It is easy to transport long distances. The suitable temperature for the growth of Astragalus is 15~32°C. Less than 1O °C, rarely foraging; below 5 °C, stop eating, go into hibernation; above 32 °C, hidden in the hole in the summer. Not very sensitive to light and taste stimulation. Spring, summer and autumn are frequent activities. Astragalus is an omnivorous fish that is dominated by animal foods. Under starvation conditions, it has the habit of eating the same type of food.
It feeds quickly and it swallows food without chewing. When food is large, it bites and then snaps the food in a way that rotates the body, and it retracts back into the hole after predation. During the growing season, it is possible to purchase pigs, cows, dogs and other livestock viscera and low-quality meat at a low price, put a small amount of salt in cooked chopped and thrown into Dianchi Lake, and the effect is particularly good.
Huang Yu has a strange sexual reversal phenomenon. From embryonic to sexual maturity are all females, and the ovaries gradually become testis after spawning. The testis is a gray and white tube. When the testis matures, about 4O centimeters in length, it turns into a male, and the sex does not change. Astragalus only breed once a year. The eggs are produced in batches. At the time of spawning, the broodstock first spits bubbles into a mass and spawns in foam. Mature fertilized eggs are golden yellow, with a larger proportion than water, no stickiness, and water swelling. Fertilized eggs hatch at about 15O hours at a water temperature of about 30oC.
2. Jianchi Dianchi Lake is generally built in places where the terrain is slightly higher and water sources are convenient. It is advisable to use ponds, puddles and other bodies of water that are not suitable for breeding other fish or for uncultivated crops. The shape of the pool can be adapted to local conditions. Small is 2 to 3 square meters, and the larger 2O to 1OO square meters. The Dianchi Lake is divided into brick pools, earth pools, cement pools and other types. A brick pool should be built at the soft soil layer, surrounded by bricks and stones, and the walls of the pool should be cemented or troweled. The bottom of the pool is tamped with triaxial soil or clay and no pores can be left. The top of the pool wall is out of the way to prevent the escape of the tail of the yellow cricket wall. No matter what the pond has to open an intake, a drainage culvert and an overflow. It is advisable to connect a water tank to the water inlet so that the water can fall from the sink into the pool and increase oxygen and escape. At the bottom of each other at the intake, open a drainage culvert, and open an overflow at a distance of 4O cm from the bottom of the pool to prevent overflow from the fish. The entire pool is 0.7-1 meters deep. Land pools can be built where water conditions are good and where the soil is hard. If a large-scale factory is cultivated, concrete pools can be built, and the bottom of the pool can be made without mud. Only concealed facilities are provided. Under normal circumstances, the depth of the pool to maintain 1O ~ 2O cm or so, the general pool also need to fill 2O ~ 3O cm thick soft soil layer. In the pool, 1/3 of the water surface can be used to grow aquatic plants such as water hyacinths, water hyacinths, and nasturtium, and pumpkins, lentils, etc. are planted next to the pool. The pool is covered with shade to create a good ecological condition. Before the stocking in Dianchi Lake, quicklime (with hectares of 75O to 9Oo kg) was used. After the water was dried, the clear pond was disinfected and the seedlings could be raised after about half a month.
Third, bait baits should be kept in different stages of growth. The silkworm meal is the best choice for the opening feed of the seedlings, and the cooked egg yolks can also be transferred into water. The fly larvae can also be fed into the larvae. The larvae, pupa, frogs, maggots and shrimps are mainly fed into the larvae. , silkworm cocoons, snail meat, etc., but also fed some fish paste or other animal viscera, especially the cockroach best, every 5 to 6 grams of fresh cockroach can grow one gram of fat. It is also possible to feed a portion of plant foods such as wheat bran, rice, fruits, and diced Vegetables. The bait should be combined with fresh meat and be fresh. The yellow buck should not eat rancid food. Acid, moldy rosin, bean curd residue, etc. Do not feed quail, so as not to cause poisoning. Feeding baits should be timed, positioned, qualitative, quantitative, to prevent the calf from disease due to overeating, and even to swell. In the first 2 to 3 days or a little longer of the stocking period, do not feed bait. After that, feed babbler and mix with other bait. Until the habit of feeding, completely switch to feeding with the mixture.
Astragalus has a strict selection of bait. Once it has been fed a long-term diet, it is difficult to change its food habits. Therefore, in the early period of feeding, it is necessary to do bait work in a short period of time, that is, to feed those sources that are widely available, at low prices, and increased in meat yield. High mixed bait. The eel took out food at night and started feeding at 4 to 5 o'clock in the afternoon or in the evening. After that, it was fed in advance on a daily basis. After about 10 to 15 days of bait, it could be fed at 9 o'clock in the morning or at 2 o'clock in the afternoon. The bait can be fed every other day to increase its food intake. The daily feed amount is 5% to 7% of the total weight of the carp. The concentrate should be less, and the coarse material should be more, and feed twice a day in the morning and evening. Feeding concentrates are put on the bait station. The bait station can use a special bait frame such as a wooden frame, a bamboo pole, an aluminum mesh cable, or a nylon mesh cloth, and fix it in the pool. The water temperature had a great influence on the food intake and feeding activities of Astragalus membranaceus. 15～28°C was the most suitable growth temperature and the feeding activity was enhanced. At this time, it was necessary to feed and feed well; below 15°C, feeding was slow, affecting the feeding; below 1°C, Stop eating and go into the cave to hibernate as the water temperature drops.
Fourth, management
1. Whether it is the purchase of seeds or self-precipitation, the 10 mg Malachite Green solution should be used to dip 25 to 30 minutes at a water temperature of 24 to 26°C or to a concentration of 3% to 4% before stocking. The saline solution is immersed for 4 to 5 minutes for disinfection, which is more effective in preventing watery mildew. At the same time, parasites (such as grasshoppers, etc.) on the surface of the fleas can also be eliminated.
2. Generally, 5 to 6O seedlings (about 1.5 kg) will be planted per square meter. The conditions are good, but you can also put some more. The seedlings in the same pool should be even, avoiding the size of polyculture to prevent eating too much.
3. The pond water should be fat, clean, dissolved oxygen, feeding should not be mostly, with rotten odor, so that the water quality is bad. Generally 1 to 2 days after feeding needs to be replaced with new water once. During the growth period, the water depth is maintained at about 1 to 15 centimeters, and the water depth is adjusted depending on the weather. Deepen the water level during the hot season but do not exceed 2O cm. Always infuse new water, and conditionally try long-circulating water. After winter, people must drain pool water and only keep the pond wet, and cover the pool with a layer of 3 to 6 inches of straw and other weeds to prevent the pool from freezing. When there is no water in the pool, it is also necessary to prevent cats, dogs, and rat pools from eating salmon.
4. Astragalus is very resistant to disease and generally does not suffer from illness. If it is found on the back of the carcass, there is a lentiglioid disease of soybean size. It is advisable to remove 1 to 2 pupae. Peel the skin over the head and tie it on the rope. Drag several pokes in the pool water. Normally it can be cured 1 or 2 times. In order to prevent disease, usually a few epilepsy can be stocked.
All in all, it is not a big difference between a big squad and a local squad. It is only a large mall that is sold as a commodity. In order to produce good economic benefits, it is recommended to sell about 0.4 kg more suitable for sale.
The last point of advice: We must be cautious in the introduction of extra-large seedlings. At present, the breeding of giant eels has become a new hot spot. Some people have taken the opportunity to fry species, and the price of seed and seedlings is not high (12O yuan/kg). The supply is not necessarily an extremely large-scale, high-quality seedling, which will easily cause economic losses to farmers. . Therefore, the author suggests that when introducing the species, it may be necessary to sign the introduction agreement on varieties, germplasm, etc. to prevent any eventuality.
Compared with the local tyrants, the tyrannical magpies have little difference. When they are carefully identifiable, the local pythons are tan-brown and the giant cubs are almost grass green. In the artificial breeding, the giant maggots are flexible and agile in artificial feeding, and they have the characteristics of rapid growth, easy feeding and miscellaneous feeding. Each year, about 2000 eggs are spawned in a very large leap year, and the fertilization rate is 95%, which is higher than that in the local area. From the time of hatching to a length of 1 kilogram, the giant praying mantis takes about 7 months and produces 25 kilograms per square meter. This kind of jaundice is strong against hunger and can be fed for 5 to 7 days without feeding. The largest maggot can grow to 1.5 kilograms, which is 6-7 times that of the local maggots. Its artificial breeding technique is not different from that of local worms. Now it is introduced as follows:
I. Habitat, a fish that is a benthic life, dwells in caves, stays nocturnal, enjoys food, and is resistant to hunger. Astragalus membranaceus is rich in mucous surface, and it is not easy to die after leaving water. It is easy to transport long distances. The suitable temperature for the growth of Astragalus is 15~32°C. Less than 1O °C, rarely foraging; below 5 °C, stop eating, go into hibernation; above 32 °C, hidden in the hole in the summer. Not very sensitive to light and taste stimulation. Spring, summer and autumn are frequent activities. Astragalus is an omnivorous fish that is dominated by animal foods. Under starvation conditions, it has the habit of eating the same type of food.
It feeds quickly and it swallows food without chewing. When food is large, it bites and then snaps the food in a way that rotates the body, and it retracts back into the hole after predation. During the growing season, it is possible to purchase pigs, cows, dogs and other livestock viscera and low-quality meat at a low price, put a small amount of salt in cooked chopped and thrown into Dianchi Lake, and the effect is particularly good.
Huang Yu has a strange sexual reversal phenomenon. From embryonic to sexual maturity are all females, and the ovaries gradually become testis after spawning. The testis is a gray and white tube. When the testis matures, about 4O centimeters in length, it turns into a male, and the sex does not change. Astragalus only breed once a year. The eggs are produced in batches. At the time of spawning, the broodstock first spits bubbles into a mass and spawns in foam. Mature fertilized eggs are golden yellow, with a larger proportion than water, no stickiness, and water swelling. Fertilized eggs hatch at about 15O hours at a water temperature of about 30oC.
2. Jianchi Dianchi Lake is generally built in places where the terrain is slightly higher and water sources are convenient. It is advisable to use ponds, puddles and other bodies of water that are not suitable for breeding other fish or for uncultivated crops. The shape of the pool can be adapted to local conditions. Small is 2 to 3 square meters, and the larger 2O to 1OO square meters. The Dianchi Lake is divided into brick pools, earth pools, cement pools and other types. A brick pool should be built at the soft soil layer, surrounded by bricks and stones, and the walls of the pool should be cemented or troweled. The bottom of the pool is tamped with triaxial soil or clay and no pores can be left. The top of the pool wall is out of the way to prevent the escape of the tail of the yellow cricket wall. No matter what the pond has to open an intake, a drainage culvert and an overflow. It is advisable to connect a water tank to the water inlet so that the water can fall from the sink into the pool and increase oxygen and escape. At the bottom of each other at the intake, open a drainage culvert, and open an overflow at a distance of 4O cm from the bottom of the pool to prevent overflow from the fish. The entire pool is 0.7-1 meters deep. Land pools can be built where water conditions are good and where the soil is hard. If a large-scale factory is cultivated, concrete pools can be built, and the bottom of the pool can be made without mud. Only concealed facilities are provided. Under normal circumstances, the depth of the pool to maintain 1O ~ 2O cm or so, the general pool also need to fill 2O ~ 3O cm thick soft soil layer. In the pool, 1/3 of the water surface can be used to grow aquatic plants such as water hyacinths, water hyacinths, and nasturtium, and pumpkins, lentils, etc. are planted next to the pool. The pool is covered with shade to create a good ecological condition. Before the stocking in Dianchi Lake, quicklime (with hectares of 75O to 9Oo kg) was used. After the water was dried, the clear pond was disinfected and the seedlings could be raised after about half a month.
Third, bait baits should be kept in different stages of growth. The silkworm meal is the best choice for the opening feed of the seedlings, and the cooked egg yolks can also be transferred into water. The fly larvae can also be fed into the larvae. The larvae, pupa, frogs, maggots and shrimps are mainly fed into the larvae. , silkworm cocoons, snail meat, etc., but also fed some fish paste or other animal viscera, especially the cockroach best, every 5 to 6 grams of fresh cockroach can grow one gram of fat. It is also possible to feed a portion of plant foods such as wheat bran, rice, fruits, and diced Vegetables. The bait should be combined with fresh meat and be fresh. The yellow buck should not eat rancid food. Acid, moldy rosin, bean curd residue, etc. Do not feed quail, so as not to cause poisoning. Feeding baits should be timed, positioned, qualitative, quantitative, to prevent the calf from disease due to overeating, and even to swell. In the first 2 to 3 days or a little longer of the stocking period, do not feed bait. After that, feed babbler and mix with other bait. Until the habit of feeding, completely switch to feeding with the mixture.
Astragalus has a strict selection of bait. Once it has been fed a long-term diet, it is difficult to change its food habits. Therefore, in the early period of feeding, it is necessary to do bait work in a short period of time, that is, to feed those sources that are widely available, at low prices, and increased in meat yield. High mixed bait. The eel took out food at night and started feeding at 4 to 5 o'clock in the afternoon or in the evening. After that, it was fed in advance on a daily basis. After about 10 to 15 days of bait, it could be fed at 9 o'clock in the morning or at 2 o'clock in the afternoon. The bait can be fed every other day to increase its food intake. The daily feed amount is 5% to 7% of the total weight of the carp. The concentrate should be less, and the coarse material should be more, and feed twice a day in the morning and evening. Feeding concentrates are put on the bait station. The bait station can use a special bait frame such as a wooden frame, a bamboo pole, an aluminum mesh cable, or a nylon mesh cloth, and fix it in the pool. The water temperature had a great influence on the food intake and feeding activities of Astragalus membranaceus. 15～28°C was the most suitable growth temperature and the feeding activity was enhanced. At this time, it was necessary to feed and feed well; below 15°C, feeding was slow, affecting the feeding; below 1°C, Stop eating and go into the cave to hibernate as the water temperature drops.
Fourth, management
1. Whether it is the purchase of seeds or self-precipitation, the 10 mg Malachite Green solution should be used to dip 25 to 30 minutes at a water temperature of 24 to 26°C or to a concentration of 3% to 4% before stocking. The saline solution is immersed for 4 to 5 minutes for disinfection, which is more effective in preventing watery mildew. At the same time, parasites (such as grasshoppers, etc.) on the surface of the fleas can also be eliminated.
2. Generally, 5 to 6O seedlings (about 1.5 kg) will be planted per square meter. The conditions are good, but you can also put some more. The seedlings in the same pool should be even, avoiding the size of polyculture to prevent eating too much.
3. The pond water should be fat, clean, dissolved oxygen, feeding should not be mostly, with rotten odor, so that the water quality is bad. Generally 1 to 2 days after feeding needs to be replaced with new water once. During the growth period, the water depth is maintained at about 1 to 15 centimeters, and the water depth is adjusted depending on the weather. Deepen the water level during the hot season but do not exceed 2O cm. Always infuse new water, and conditionally try long-circulating water. After winter, people must drain pool water and only keep the pond wet, and cover the pool with a layer of 3 to 6 inches of straw and other weeds to prevent the pool from freezing. When there is no water in the pool, it is also necessary to prevent cats, dogs, and rat pools from eating salmon.
4. Astragalus is very resistant to disease and generally does not suffer from illness. If it is found on the back of the carcass, there is a lentiglioid disease of soybean size. It is advisable to remove 1 to 2 pupae. Peel the skin over the head and tie it on the rope. Drag several pokes in the pool water. Normally it can be cured 1 or 2 times. In order to prevent disease, usually a few epilepsy can be stocked.
All in all, it is not a big difference between a big squad and a local squad. It is only a large mall that is sold as a commodity. In order to produce good economic benefits, it is recommended to sell about 0.4 kg more suitable for sale.
The last point of advice: We must be cautious in the introduction of extra-large seedlings. At present, the breeding of giant eels has become a new hot spot. Some people have taken the opportunity to fry species, and the price of seed and seedlings is not high (12O yuan/kg). The supply is not necessarily an extremely large-scale, high-quality seedling, which will easily cause economic losses to farmers. . Therefore, the author suggests that when introducing the species, it may be necessary to sign the introduction agreement on varieties, germplasm, etc. to prevent any eventuality.
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