Carp (Cyprinus cuspidatum) is a traditional valuable freshwater species in China and has high economic value. It is known as “freshwater grouperâ€. The squid can be either monocultured or polycultured, but the latter has the characteristics of less investment and less risk under the existing culture structure. Now, several polyculture modes are introduced for reference by peers.
First, the pro-fish pond polyculture common four home fish broodstock associated with a certain amount of wild miscellaneous fish, they compete with the main broodstock for water space, consume water, dissolved oxygen, and eat feed, unfavorable to the broodstock pool cultivation. In the broodstock pond, part of the squid is bred, and the wild fish in the pool are used as baits, which have better economic and ecological benefits. The general parent pool is roughly divided into two major types, which are grasses and herrings, and the main objects of pupa and pupa. Production practice shows that the two types of grasses and bluefishes have a good effect on the polyculture of squid in the parent pool, followed by the parental pool.
l The time spent by the parents and the grasses and the herring-based parent fish pool is not strictly limited, and it is usually appropriate to use artificial breeding after the end of artificial breeding. Before stocking the eel fry, the number of wild fish in the pond should be thoroughly analyzed to determine a reasonable stocking amount. The feed coefficient of the eel is generally 4-6. The density of stocking eel fry (about 3.5 cm in length) is about 50 to 100 tails/mu. When there is a certain gap in the pool, the wild fish should be delivered at a density of 250-500 tails per mu. About a centimeter of fish fry to supplement the lack of bait fish. Generally after about 6 months of growth, the individual product specifications can reach 300-500 grams, the survival rate of carp is 35-60%, and the yield of polycultured carp is 10-15 kilograms; when carp species weighing 30-50 grams are put in , Acre stocking capacity of 20-25, finished product specifications can reach 5O0-600 grams, the survival rate of more than 80%, the yield level of 16-20 kg. As the fresh water of grass and bluefish parent pools is fresh, it is very beneficial to the growth of carp.
2. The parent fish ponds, which are mainly oysters and clams, are mixed and stocked. When they are stocked with 15 to 50 tails, they can grow for about six months and weigh about 400 grams. The survival rate of squid is 40-80%. The yield is 5-8 kg; when the catfish species weighing 30-50 g are put, the 15-4 O mu is released, and it can grow to 50O g or so and the survival rate can reach over 80%. It should be noted that the water quality of broodstock, which is dominated by earthworms and cockroaches, is relatively high, and mixed codfish should be frequently refilled with fresh water and drugs to improve water quality.
Second, the polyculture of fish ponds This is a good model for polytrophic squid. It not only cultivates large-scale fish species, but more importantly, it also obtains a certain amount of commercial oysters, making the species more effective. improve.
1. The polyculture of carp and summer fish species is based on grass carp fingerling species, and the main fish culture (about 2 cm in length) is put at about 1.6 million tails/mu, and the polyculture summer carp 600-700. Tail; mainly squid species, the main fish fry put 1.5 million / acre, polyculture summer flower carp 4O0-600 / acre. At the end of the year, the aquaculture model can obtain 250-400 kilograms of large-scale grasses, clams, clams, and carp species per mu, and can obtain 120-220 kilograms of carp from 3O0-500 g of merchandise. However, in the daily management, we must pay attention to continuously improve the water level; ensure the baitfish (the length of the bait is less than 45-55% of the body length of the carp); keep the water quality is good, it is best to add an aerator; fish disease prevention.
2. The polyculture of large-sized squid species refers to squid species with a polyculture tail weight of 30-50 grams. When polyculture is required, the specifications of the fish species should be as consistent as possible in order to increase the effective utilization of the main fish species. When the sizes of the main fish species and the polytrophic fish species are large, the body length of the main fish species must be polyculture. The length of the carp is within l/2 of the length of the stocking standard. The fish ponds are generally dominated by alfalfa; the main breeding stock is 533,000 to 600,000, and the polyculture species are 350 to 400. The fish species mainly include grasses and herrings, and the main stock is mu. 6066,000 tails and 4O0-450 tails of polyculture carp species. After about half a year's growth, the average finished product size of eel can reach 500-600 grams, 150-250 kilograms per mu product, and 200-450 kilograms of large-scale main fish species. Its management measures are the same as above.
Third, adult fish pond polyculture Like the parent pool, the adult fish pond is often accompanied by a certain amount of wild fish. Therefore, adult fish pond polyculture carp is a technique that is worthy of widespread promotion.
1. Fish-breeding ponds, mainly fish-eating, include polyculture, squid, and eating fish such as grasses, blues, oysters, oysters, oysters, and oysters. The first polyculture mode is to put Eel summer flowers into use: they are required to be stocked at the end of May or early June. Generally, 50-80 tails of summer carp are used for the summer and 350 grams of Finished Products are harvested at the end of the year. 7-12 kg/mu; Is to put 30-50 grams of carp species; can be stocked together with the main fish species, can also be stocked individually, the acre density is 15-25, the end of the year can be obtained about 550 grams of finished products per 6 ll kg . It should be noted that the number of wild fish in the pool should be checked before stocking the carp for early use as a stocking plan for bait fish. For the sake of safety, a portion of the squid and squid outside the total stocking plan may be mixed with the pool to supplement the deficiency of the squid bait fish.
2. Fish-feeding ponds, mainly filter-feeding fish, are the main source of fingerlings and catfish. Because of its relatively good water quality, it requires a fish pond area of ​​more than 5 acres, preferably 10-15 acres, water depth of 2.5-3 meters, with good drainage and irrigation conditions, it is best equipped with aerator. One of the polyculture modes is the delivery of summer eel flowers, with 40-60 mu per mu. At the end of the year, 4.2-7.2 kg of finished products with a specification of about 300 g can be harvested; the second is to put 30-50 g of large-size carp species. Acre put 10-20, the end of the year can be obtained in specifications about 500 grams of finished products 2.5-7.0 kg. The key to the technology of polyculture of squid in filter-feeding adult fish ponds is to prevent the catfish from lacking oxygen. Therefore, it is necessary to constantly refill with fresh water. Each day and night, aerators are opened at 3-4 p.m. and at 1-2 p.m. Other management is synchronized with the main fish.
First, the pro-fish pond polyculture common four home fish broodstock associated with a certain amount of wild miscellaneous fish, they compete with the main broodstock for water space, consume water, dissolved oxygen, and eat feed, unfavorable to the broodstock pool cultivation. In the broodstock pond, part of the squid is bred, and the wild fish in the pool are used as baits, which have better economic and ecological benefits. The general parent pool is roughly divided into two major types, which are grasses and herrings, and the main objects of pupa and pupa. Production practice shows that the two types of grasses and bluefishes have a good effect on the polyculture of squid in the parent pool, followed by the parental pool.
l The time spent by the parents and the grasses and the herring-based parent fish pool is not strictly limited, and it is usually appropriate to use artificial breeding after the end of artificial breeding. Before stocking the eel fry, the number of wild fish in the pond should be thoroughly analyzed to determine a reasonable stocking amount. The feed coefficient of the eel is generally 4-6. The density of stocking eel fry (about 3.5 cm in length) is about 50 to 100 tails/mu. When there is a certain gap in the pool, the wild fish should be delivered at a density of 250-500 tails per mu. About a centimeter of fish fry to supplement the lack of bait fish. Generally after about 6 months of growth, the individual product specifications can reach 300-500 grams, the survival rate of carp is 35-60%, and the yield of polycultured carp is 10-15 kilograms; when carp species weighing 30-50 grams are put in , Acre stocking capacity of 20-25, finished product specifications can reach 5O0-600 grams, the survival rate of more than 80%, the yield level of 16-20 kg. As the fresh water of grass and bluefish parent pools is fresh, it is very beneficial to the growth of carp.
2. The parent fish ponds, which are mainly oysters and clams, are mixed and stocked. When they are stocked with 15 to 50 tails, they can grow for about six months and weigh about 400 grams. The survival rate of squid is 40-80%. The yield is 5-8 kg; when the catfish species weighing 30-50 g are put, the 15-4 O mu is released, and it can grow to 50O g or so and the survival rate can reach over 80%. It should be noted that the water quality of broodstock, which is dominated by earthworms and cockroaches, is relatively high, and mixed codfish should be frequently refilled with fresh water and drugs to improve water quality.
Second, the polyculture of fish ponds This is a good model for polytrophic squid. It not only cultivates large-scale fish species, but more importantly, it also obtains a certain amount of commercial oysters, making the species more effective. improve.
1. The polyculture of carp and summer fish species is based on grass carp fingerling species, and the main fish culture (about 2 cm in length) is put at about 1.6 million tails/mu, and the polyculture summer carp 600-700. Tail; mainly squid species, the main fish fry put 1.5 million / acre, polyculture summer flower carp 4O0-600 / acre. At the end of the year, the aquaculture model can obtain 250-400 kilograms of large-scale grasses, clams, clams, and carp species per mu, and can obtain 120-220 kilograms of carp from 3O0-500 g of merchandise. However, in the daily management, we must pay attention to continuously improve the water level; ensure the baitfish (the length of the bait is less than 45-55% of the body length of the carp); keep the water quality is good, it is best to add an aerator; fish disease prevention.
2. The polyculture of large-sized squid species refers to squid species with a polyculture tail weight of 30-50 grams. When polyculture is required, the specifications of the fish species should be as consistent as possible in order to increase the effective utilization of the main fish species. When the sizes of the main fish species and the polytrophic fish species are large, the body length of the main fish species must be polyculture. The length of the carp is within l/2 of the length of the stocking standard. The fish ponds are generally dominated by alfalfa; the main breeding stock is 533,000 to 600,000, and the polyculture species are 350 to 400. The fish species mainly include grasses and herrings, and the main stock is mu. 6066,000 tails and 4O0-450 tails of polyculture carp species. After about half a year's growth, the average finished product size of eel can reach 500-600 grams, 150-250 kilograms per mu product, and 200-450 kilograms of large-scale main fish species. Its management measures are the same as above.
Third, adult fish pond polyculture Like the parent pool, the adult fish pond is often accompanied by a certain amount of wild fish. Therefore, adult fish pond polyculture carp is a technique that is worthy of widespread promotion.
1. Fish-breeding ponds, mainly fish-eating, include polyculture, squid, and eating fish such as grasses, blues, oysters, oysters, oysters, and oysters. The first polyculture mode is to put Eel summer flowers into use: they are required to be stocked at the end of May or early June. Generally, 50-80 tails of summer carp are used for the summer and 350 grams of Finished Products are harvested at the end of the year. 7-12 kg/mu; Is to put 30-50 grams of carp species; can be stocked together with the main fish species, can also be stocked individually, the acre density is 15-25, the end of the year can be obtained about 550 grams of finished products per 6 ll kg . It should be noted that the number of wild fish in the pool should be checked before stocking the carp for early use as a stocking plan for bait fish. For the sake of safety, a portion of the squid and squid outside the total stocking plan may be mixed with the pool to supplement the deficiency of the squid bait fish.
2. Fish-feeding ponds, mainly filter-feeding fish, are the main source of fingerlings and catfish. Because of its relatively good water quality, it requires a fish pond area of ​​more than 5 acres, preferably 10-15 acres, water depth of 2.5-3 meters, with good drainage and irrigation conditions, it is best equipped with aerator. One of the polyculture modes is the delivery of summer eel flowers, with 40-60 mu per mu. At the end of the year, 4.2-7.2 kg of finished products with a specification of about 300 g can be harvested; the second is to put 30-50 g of large-size carp species. Acre put 10-20, the end of the year can be obtained in specifications about 500 grams of finished products 2.5-7.0 kg. The key to the technology of polyculture of squid in filter-feeding adult fish ponds is to prevent the catfish from lacking oxygen. Therefore, it is necessary to constantly refill with fresh water. Each day and night, aerators are opened at 3-4 p.m. and at 1-2 p.m. Other management is synchronized with the main fish.
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