CN110915729A - Method for improving cultivation survival rate of pelteobagrus fulvidraco fingerlings - Google Patents
Method for improving cultivation survival rate of pelteobagrus fulvidraco fingerlings Download PDFInfo
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G20/00—Cultivation of turf, lawn or the like; Apparatus or methods therefor
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
- A01K61/13—Prevention or treatment of fish diseases
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/003—Aquaria; Terraria
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/042—Introducing gases into the water, e.g. aerators, air pumps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Zoology (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
A method for improving the breeding survival rate of pelteobagrus fulvidraco fingerlings and a preparation method thereof comprise the following steps: (1) the method comprises the following steps of (1) designing a seedling cultivation pool, (2) designing a bait cultivation pool, (3) fertilizing and bottom fixing of grass in the seedling cultivation pool and the bait cultivation pool, (4) fertilizing water quality, (5) putting seedlings, (6) preventing and treating plant diseases and insect pests, (7) supplementing biological bait by jointing, (8) feeding feed and (9) regularly adjusting water. According to the invention, the net frame is erected around the fry rearing pond, and the aeration stones are arranged on the net frame, so that attachments are provided for the fry which cannot swim smoothly immediately in the pond, and the fry is prevented from sinking into the water bottom and being killed by oxygen deficiency.
Description
Technical Field
The invention belongs to the technical field of aquaculture, and relates to a method for improving the breeding survival rate of pelteobagrus fulvidraco offspring seeds.
Background
With the development of the yellow catfish industry, breeding varieties are continuously changed, from the first common yellow catfish to the full-male yellow catfish and to the hybrid yellow catfish with red fire in recent years, the breeding varieties are continuously updated, the industrial technology is changed day by day, which shows that the industry is developing vigorously, the yellow catfish breeding method becomes a huge industry beyond four major fishes, snakeheads, weever, mandarin fish and the like, the annual demand of offspring seeds breaks through billions of tails, and the daily market quantity of commercial fishes exceeds 100 kilos. However, the pelteobagrus fulvidraco fry breeding technology has no breakthrough progress, under the general pond condition, the average survival rate of fish species from water bloom to summer is less than 30%, the three reasons are the first reason, the key influencing the survival rate of summer breeding is that the two food conversion links from the fish fry absorbing yolk sacs to feeding the zooplankton at the opening and from feeding the zooplankton to feeding the artificial compound feed are adopted, and if the food supply is insufficient or uncomfortable in the food conversion period, the survival rate is influenced; secondly, the most suitable rotifers are gradually replaced by larger cladocerans, copepods and protozoa along with the change of time of zooplankton in the pond, if the putting time is wrong, the feeding is not suitable for fry feeding, and after mass propagation, the water body is easy to lack of oxygen to damage the fries; thirdly, the yellow catfish fry is very easy to be infected with parasitic diseases such as trichodina, siphonostera, ichthyophthirius multifiliis and the like, and the fry is very easy to die if the fish is not killed in time during the cultivation period.
From the applied or granted pelteobagrus fulvidraco fry breeding patents, most of the patents do not relate to the three-point problems, or do not provide specific effective measures for the problems, such as the patent with the application publication number of CN109169416A, mainly limit the parent breeding and reproduction technology of pelteobagrus fulvidraco, but describe the technical measures of fry breeding which are too simple, do not require environmental conditions, nor describe the technical measures of fry feeding habit conversion and bait connection. As another patent CN103688887A, although the technology for breeding fish fries is refined, the technology for protecting fish fries in the initial stage of going to the pond, switching between feeds, and fertilizing water in the later stage is still lack of specific technical measures, the rice planted in the patent is emergent aquatic plants, only the roots immersed in the water can provide habitat for the fish fries, the space is very limited, and it is not favorable for the fish fries to adhere to and perch.
Disclosure of Invention
The invention aims to provide a method for improving the breeding survival rate of pelteobagrus fulvidraco offspring seeds.
In order to achieve the above objects and other related objects, the present invention provides the following technical solutions: a method for improving the breeding survival rate of pelteobagrus fulvidraco fingerlings comprises the following steps:
(1) fry rearing pond design
Preparing three ponds, wherein one pond is a seedling culture pond, the other two ponds are bait culture ponds, the middle part of the seedling culture pond is built into a shoal with the height of 25-35cm and the area of 18-22% of the total area of the pond by using pond bottom mud, and mugwort is planted on the shoal; erecting a fry attaching net frame along the slope of a pond ridge of the fry rearing pond, wherein a plurality of aeration stones are contained in the fry attaching net frame and are connected with an oxygenation pump through pipelines;
(2) bait culture pond design
The area of the bait cultivating pool is 3 multiplied by 667m2~5×667m2；
(3) Seedling culture pond and bait culture pond, grass planting, fertilizer pulling and bottom fixing
Sowing mugwort seeds in the seedling cultivation pool and the bait cultivation pool, sowing mugwort seeds 2-3 meters away from the bank of the pond along the periphery of the pond, wherein the width of a sowing area is 1.8-2.2 meters, and the sowing density is controlled to be 10-20 g of mugwort seeds/m2；
(4) Water quality for fertilizing
Injecting water into the seedling culture pond 10 days before seedling placing to ensure that the water depth of the seedling culture pond is 30-40 cm, soaking mugwort sowed around the pond into the water 5 days before seedling placing, and then gradually raising the water level to ensure that the water gradually submerges the mugwort on the shoal to enable the mugwort to rot;
(5) fry throwing in
In the early morning or evening of a sunny day, putting the pelteobagrus fulvidraco fry which comes out of the film for 3 days with water into a fry attaching net frame, and starting an oxygenation pump to oxygenate; each 667m240-60 ten thousand fish tails of pelteobagrus fulvidraco fish fries are thrown;
(6) pest control
In order to prevent the yellow catfish fry from being infected with bacterial diseases and parasitic diseases, the following steps are carried out:
the method comprises the following steps: 4-6 days after the seedlings are placed, the mixture of copper sulfate and ferrous sulfate is used for sprinkling to prevent the occurrence of parasite diseases; firstly, diluting the mixture of copper sulfate and ferrous sulfate by more than 1500 times by using water with the temperature of less than or equal to 60 ℃, and when the water temperature of the seedling culture pond is more than 22 ℃, the dosage of the mixture of copper sulfate and ferrous sulfate is 0.6 g/m30.7g/m3When the water temperature of the seedling culture pond is 10-22 ℃, the dosage of the mixture of copper sulfate and ferrous sulfate is 0.7g/m30.75 g/m3；
Step two: when the body length of the pelteobagrus fulvidraco fry reaches 1.5cm-10.0cm, adding a pharmaceutical composition into the feed according to 2.5-3.5% of the mass of the feed, wherein the pharmaceutical composition is prepared by mixing the following raw materials in parts by weight: 8-10 parts of vitamin K3 powder, 18-22 parts of Sanhuang powder, 8-10 parts of Celite, 8-10 parts of Chinese globeflower powder, 18-22 parts of Fancorum bengal, 18-22 parts of compound doxycycline and 8-10 parts of humifuse euphorbia herb, wherein the feed is continuously fed for 5 days after 1 time per day;
step three: the internal medicine is selected from florfenicol or enrofloxacin 1 time a day, 3 d-5 d each time, and the dosage is 80-100g of the internal medicine added into each ton of feed;
(6) regularly performing microscopic examination, and if fish bodies are infected with bacterial diseases and parasitic diseases, performing the following steps:
firstly, a mixture of copper sulfate and ferrous sulfate is used for killing insects, and then chlorine dioxide is used for disinfecting and sterilizing a water body; simultaneously, adding florfenicol or enrofloxacin into the feed;
step two, adding the pharmaceutical composition into the feed according to 2.5-3.5% of the mass of the feed; feeding for 1 course of treatment. Continuously feeding for 5 days for 1 time per day in each treatment course;
(7) biological bait stubble supplementing
The first bait cultivating pool is disinfected in the whole pool before the seedlings are put in the first bait cultivating pool; the first bait culturing pool is used for fertilizing and culturing water on the day of fry placing in the fry culturing pool, and culturing bait organisms; after the fry rearing ponds are used for killing insects, pumping water from the first bait rearing pond and irrigating the water to the fry rearing pond, wherein the water adding amount is 18-22cm higher than the water level of the fry rearing pond so as to provide biological bait;
the second bait cultivating pool is disinfected in the whole pool before the seedlings are put; in the second bait culturing pool, on the day of killing insects in the fry culturing pool, fertilizing and culturing water, and culturing bait organisms; pumping water from the second bait culture pond to the fry culture pond 8-12 days after the fries are put into the pond, and adding 18-22cm of water to increase the water level of the fry culture pond so as to provide biological bait;
(8) feeding fodder
After the second water injection, feeding the pelteobagrus fulvidraco pellet feed with the particle size of 1-1.5mm, wherein the feeding amount of the pelteobagrus fulvidraco pellet feed for the first time is 3-5% of the total mass of the pelteobagrus fulvidraco fed in the fry rearing pond, the pelteobagrus fulvidraco pellet feed is fed along a water area planted with artemisia argyi, the pelteobagrus fulvidraco pellet feed is fed every 10-12 m after 3 days, the feeding points are gradually reduced, after 10 days, 1 bait feeding machine is erected in each pond for feeding at fixed points, and the feeding amount is increased to 8-10% of;
(9) regular water regulation
In 6 to 10 months, the microecologics, the water disinfectants and the substrate modifying agents are recycled, and specifically, the water adjusting and substrate modifying mode is '2 +1+ 1', namely: after the microecologics are used for 2 times, 1 time of water disinfectant is used, 8-10 days are spaced for each time, after the water disinfectant is used for 2 days, the substrate modifier is used for 1 time, and after the substrate modifier is used for 10 days, the microecologics are used again, and the steps are recycled.
The preferable technical scheme is as follows: the area of the pond is 3 multiplied by 667m2~5×667m2The depth of the pond is 1.8-2.4m, and the bottom of the pond is flat.
The preferable technical scheme is as follows: the fry attaching net frame consists of net pieces and a frame, the frame is of a wood structure, the specification is 1m multiplied by 0.5m, and the height of the frame body is 6 cm; a groove is formed in the place, 15-20cm away from the bottom of the pond, of the slope of the pond ridge of the fry rearing pond, the groove depth is 4-5cm, the groove height is 8cm, and the groove length is 1 m; inserting the fry attached to one side of the long edge of the net frame into the groove, punching a hole in the middle of the frame at the other side, penetrating the hole with a rope, and stretching the fry to the pond ridge for fixing so as to enable the net frame to be arranged in a horizontal state; 4-6 aeration stones are placed in the fry attaching net frame and are connected with an oxygenation pump on the bank side through a pipeline.
The preferable technical scheme is as follows: the mass ratio of the copper sulfate to the ferrous sulfate is 4-6: 1.
due to the application of the technical scheme, compared with the prior art, the invention has the advantages that:
1. according to the invention, the net frame is erected around the fry rearing pond, and the aeration stones are arranged on the net frame, so that attachments are provided for the fry which cannot swim smoothly immediately in the pond, and the fry is prevented from sinking into the water bottom and being killed by oxygen deficiency.
2. According to the method, the mugwort is planted in the fry rearing pond, and because the mugwort has wide leaf surfaces, a sufficient habitat is provided for the fry; the mugwort is slowly composted after being put into water, and can fertilize water, cultivate zooplankton and provide initial feed for fry. The mugwort on the shoal in the middle of the cultivation pool is added with water in the later period and submerged in water, and then the mugwort can be slowly macerated to rot, thereby achieving the purpose of continuously fertilizing the water body.
3. The traditional breeding method is to change the compound feed after the first pest killing, and at the moment, the fry is not completely adapted to the compound feed, and the fry breeding survival rate is not high. The invention provides the fry rearing pond with the bait rearing pond, and the special pond is used for rearing biological baits, so that the condition that the biological baits are insufficient after the fry rearing pond kills insects can be effectively relieved, and the fry can be ensured to be supplied with sufficient and palatable biological baits until the fry grows up to eat the compound feed.
4. The invention combines prevention and treatment for controlling diseases and pests, and kills insects 4-6 days after fish fries are put into a pond, no matter whether the fish fries are infected with the diseases and pests, and performs regular microscopic examination and timely killing. In different growth stages, immunopotentiator is added into the feed to improve disease resistance of the organism.
5. The '2 +1+ 1' water-adjusting bottom-changing mode adopted by the invention can effectively adjust the activity level of algae and fungi in the water body, reduce organic matters at the bottom of the pool, kill pathogenic bacteria in the water body and the bottom, and can effectively reduce the concentration of nitrogen and phosphorus, increase dissolved oxygen and reduce the occurrence of diseases of the pelteobagrus fulvidraco, particularly the occurrence of juvenile fish bubble disease, by the comprehensive use of water-adjusting, bottom-changing and disinfecting preparations.
Drawings
Fig. 1 is a schematic view of a fixed structure of a screen frame.
Fig. 2 is a schematic view of a screen frame.
Fig. 3 is a schematic sectional structure diagram of the fry rearing pond.
In the above figures, 1, a screen frame; 2. a pond ridge; 3. the bottom of the pool; 4. rope piles; 5. a rope; 6. and (4) shoal.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1-3. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Example 1: method for improving cultivation survival rate of pelteobagrus fulvidraco fingerlings and preparation method thereof
The invention aims to provide a method for improving the survival rate of pelteobagrus fulvidraco fry in a pond, which is a method for directly putting 3 days after pelteobagrus fulvidraco fry into an outdoor pond to cultivate summer fish species with the full length of more than 3 cm.
The basic steps are as follows:
(1) requirements of fry rearing pond
The water source is sufficient, the water quality is fresh, the water inlet and the water outlet are convenient, the pool is rectangular, the east and west directions are oriented, and the area is 3 multiplied by 667m2~5×667m2The depth of the pond is 2m, and the bottom of the pond is flat. The preparation of the pond is carried out according to the prior art, namely, redundant sludge in the pond is removed, the pond ridge 2 at the bottom of the pond is trimmed, quicklime is added into water to be splashed in the whole pond for disinfection, and the water is drained and exposed to the sun. A protective net with the height of 1m is arranged around the pond ridge, so as to prevent harmful organisms such as frogs and snakes from entering the pond to harm the fry. And (3) piling up pond bottom mud at the middle position of the seedling culture pond to form a shoal 6 with the height of 30cm and the area accounting for 20 percent of the total area of the pond on the pond bottom 3 for planting the mugwort.
A fry attaching net frame 1 is erected along the slope of the pond ridge and consists of net pieces and a frame, the frame is of a wood structure, the specification is 1m multiplied by 0.5m, and the height of the frame body is 6 cm. And (3) slotting 15-20cm away from the pond bottom of the pond slope, wherein the depth of the slot is 4-5cm, the height of the slot is 8cm, and the length of the slot is 1 m. Inserting one side of the long side of the net frame into the slot, punching the middle of the side frame at the other side, penetrating the hole with a rope 5, stretching the rope to the rope piles 4 on the pond ridge to fix the net frame in a horizontal state, as shown in the figure. 4-6 aeration stones are placed in each net frame and connected with an oxygenation pump on the bank side for oxygenation.
(2) The requirement of the bait culture pond
In order to ensure that enough palatable biological bait is always available before the fry ingests the compound feed, 2 mouths of biological bait with the area of 3 multiplied by 667m are additionally prepared2~5×667m2The bait cultivating pool is also required to remove redundant sludge, trim the pond ridge at the bottom of the pond, mix quicklime with water, sprinkle and disinfect the whole pond, drain and expose the pond, and arrange a protective net with the height of 1m around the pond ridge.
(3) Seedling culture pond and bait culture pond, grass planting, fertilizer pulling and bottom fixing
3 months in fry rearing pondAnd mugwort is sowed in the bait culture pond, so that excessive nutrients in the bottom mud are absorbed, and the function of solidifying the bottom of the pond can be achieved. Sowing mugwort seeds 2-3 meters off the bank along the periphery of the pond, wherein the width of a planting area is 2 meters, and the sowing density is controlled to be 10-20 g/m2(ii) a And then spreading the mugwort seeds on the middle shoal of the pond, wherein the area of the mugwort seeds is 20 percent of the area of the pond.
(4) Water quality for fertilizing
Injecting water of 30-40 cm 10 days before seedling release, fertilizing and culturing water 5 days before seedling release, and ensuring that the reproduction quantity of rotifers and small cladocerans in the pond reaches a peak period. The early stage water level is lower, and the mugwort that only sowed along pond all around soaks the water, and the rich water that rots gradually, and the water level constantly increases afterwards, submerges the mugwort on the shoal gradually, rots the rich water gradually to continuously keep the water body fertility.
(5) Fry throwing in
And (3) putting the fry which is out of the film for 3 days with water into a net frame in the early morning and evening of a sunny day with lower air temperature. Before fry placing, testing water by using water testing fishes to ensure that a water body has no toxicity, the method comprises the steps of using a container to contain a proper amount of pond water, placing a certain amount of fries, observing the activity condition of the fries, and after 6 hours, placing the fries when the activity condition of the water testing fishes is normal, and starting an oxygenation pump to oxygenate. Each 667m240-60 ten thousand tails of yellow catfish water are thrown.
(6) Pest control
In order to prevent the fry from being infected by bacterial diseases and parasitic diseases, the following steps are carried out:
① after seedling emergence, sprinkling copper sulfate and ferrous sulfate mixture (ratio 5: 2) to prevent parasite diseases, wherein the water temperature for dissolving the medicine is no more than 60 deg.C, and the specific dosage is 0.6 g/m30.7g/m3(water temperature is above 22 ℃), 0.7g/m30.75 g/m3（10℃~22℃）。
② when the fry length reaches 1.5cm and 10.0cm, adding vitamin K3 powder (10%) + sanhuang powder (20%) + jinmie (10%) + qinglian powder (10%) + aromojunni (20%) + compound doxycycline (20%) + humifuse euphorbia (10%) into the feed according to 3% of the feed mass, feeding for 1 course, and continuously feeding for 5 days according to 1 time per day for each course.
③ the oral medicine is florfenicol or enrofloxacin, 1 time per day, 3 d-5 d per time, and the dosage is 100g per ton of feed.
Regularly performing microscopic examination, and if fish bodies are infected with bacterial diseases and parasitic diseases, performing the following steps:
① copper sulfate and ferrous sulfate 0.7g/m3(ratio 5: 2) killing parasite, and diluting the solution with water at a temperature not higher than 60 deg.C by more than 1500 times. The next day, the mixture is used at a concentration of 0.3g/m3The chlorine dioxide water body with the concentration is disinfected and sterilized, and meanwhile, the florfenicol or enrofloxacin is added into the feed, generally 1 time per day, 6 d-10 d each time, and the dosage is 100g of the product added into each ton of feed.
② vitamin K3 powder (10%) + sanhuang powder (20%) + jinmie (10%) + Qinglian powder (10%) + Fancorubini (20%) + Fufang doxycycline compound (20%) + Euphorbia humifusa (10%) are added into the feed according to 3% of the feed mass, and the feed is fed for 1 treatment course, wherein each treatment course is fed for 5 days continuously according to 1 time per day.
(7) Biological bait stubble supplementing
The bait cultivating pool 1 is disinfected in the whole pool 15 days before the seedlings are put. The bait culture pond 1 is used for fertilizing and culturing water on the day of fry placing in the fry culture pond, and culturing bait organisms such as rotifers, small cladocerans and the like. After the fry rearing pond kills insects, water is pumped from the bait rearing pond 1 and is filled into the fry rearing pond, and the water adding amount is increased by 20cm for the water level so as to provide biological bait.
The bait cultivating pool 2 is disinfected in the whole pool 10 days before the seedlings are put. The bait culture pond 2 is used for fertilizing and culturing water on the day of killing insects in the fry culture pond, and culturing bait organisms such as rotifers and small cladocerans. And after the fry are placed in the pond for 10 days, pumping water from the bait culture pond 2 and filling the water into the fry culture pond, wherein the water adding amount is increased by 20cm for the water level, and providing biological bait for the fry again.
(8) Feeding fodder
After the second water injection, feeding pelteobagrus fulvidraco pellet feed with the particle size of 1-1.5mm, wherein the feeding amount of the pelteobagrus fulvidraco pellet feed for the first time is 3-5% of the mass of the fish body, feeding the pelteobagrus fulvidraco pellet feed along a water area planted with artemisia argyi, feeding the pelteobagrus fulvidraco pellet feed every 10-12 m at fixed points after 3 days, gradually reducing the feeding points, erecting 1 feeding machine for fixed-point feeding in each pond after 10 days, and increasing the feeding amount to 8-.
(9) Regular water regulation
And 6-10 months, the microecologics, the water disinfectants and the substrate modifying agents are recycled, and the water regulating and substrate modifying mode is specifically a '2 +1+ 1' water regulating and substrate modifying mode, namely: after the microecologics are used for 2 times, 1 time of water disinfectant is used, 8-10 days are spaced for each time, after the water disinfectant is used for 2 days, the substrate modifier is used for 1 time, and after the substrate modifier is used for 10 days, the microecologics are used again, and the steps are recycled.
(4) The invention combines prevention and treatment for controlling diseases and pests, and kills insects 4-6 days after fish fries are put into a pond, no matter whether the fish fries are infected with the diseases and pests, and performs regular microscopic examination and timely killing. In different growth stages, immunopotentiator is added into the feed to improve disease resistance of the organism.
(5) The '2 +1+ 1' water-adjusting bottom-changing mode adopted by the invention can effectively adjust the activity level of algae and fungi in the water body, reduce organic matters at the bottom of the pool, kill pathogenic bacteria in the water body and the bottom, and can effectively reduce the concentration of nitrogen and phosphorus, increase dissolved oxygen and reduce the occurrence of diseases of the pelteobagrus fulvidraco, particularly the occurrence of juvenile fish bubble disease, by the comprehensive use of water-adjusting, bottom-changing and disinfecting preparations.
Example 2: method for improving cultivation survival rate of pelteobagrus fulvidraco fingerlings and preparation method thereof
(1) Requirements of fry rearing pond
The selected area is 3X 667m2The pond with the pond depth of 2m is used as a fry rearing pond, the pond is required to have sufficient water source, fresh water quality and convenient water inlet and drainage, and the pond is rectangular and has a flat bottom in the east-west direction. And removing redundant sludge in the pond, trimming the pond ridge at the bottom of the pond, adding quicklime into the water, sprinkling the mixture into the whole pond for disinfection, draining and exposing to the sun. A protective net with the height of 1m is arranged around the pond ridge, so as to prevent harmful organisms such as frogs and snakes from entering the pond to harm the fry. And (3) building a shoal with the height of 30cm and the area accounting for 20% of the total area of the pond by using pond bottom mud at the middle position of the seedling culture pond, and planting the mugwort.
A fry attaching net frame is erected along the slope of the pond ridge and consists of net pieces and a frame, the frame is of a wood structure, the specification is 1m multiplied by 0.5m, and the height of the frame body is 6 cm. And (3) grooving at the position of the pond slope 20cm away from the bottom of the pond, wherein the groove depth is 5cm, the groove height is 8cm, and the groove length is 1 m. Inserting one side of the long side of the net frame into the slot, punching a hole in the middle of the side frame on the other side, penetrating the hole with a rope, stretching the net frame to the pond ridge and fixing the net frame in a horizontal state, as shown in the figure. 6 aeration stones are placed in each net frame and connected with an oxygenation pump on the bank side for oxygenation.
(2) The requirement of the bait culture pond
In order to ensure that enough palatable biological bait is always available before the fry ingests the compound feed, 2 mouths of biological bait with the area of 3 multiplied by 667m are additionally prepared2The bait cultivating pool is also required to remove redundant sludge, trim the pond ridge at the bottom of the pond, mix quicklime with water, sprinkle and disinfect the whole pond, drain and expose the pond, and arrange a protective net with the height of 1m around the pond ridge.
(3) Seedling culture pond and bait culture pond, grass planting, fertilizer pulling and bottom fixing
Sowing seeds of folium Artemisiae Argyi 2m around the seedling culture pond and the bait culture pond in 2 days of 3 months, wherein the sowing density is controlled at 15g/m2The width of the planting area is 2 meters; and then spreading the mugwort seeds on the middle shoal of the pond, wherein the area of the mugwort seeds is 20 percent of the area of the pond.
(4) Water quality for fertilizing
And 5 months and 30 days, injecting 35cm of water into the seedling culture pond, and 5 days in 6 months, and fertilizing the water quality by using the amino acid fertilizer water paste. The mugwort can be gradually rotten after being soaked in water, and can also continuously increase the fertility of the water body.
(5) Fry delivery
And 6, 10 days and 1 days after 6 months, using a container to contain a proper amount of water in the fry rearing pond, putting a certain amount of fries to be put, observing the activity of the fries, and ensuring that the activity of the water testing fish is normal after 6 hours.
And 6, 10, 7 days after 6 months, putting the pelteobagrus fulvidraco fry which is out of the film for 3 days with water into a net frame, and starting an oxygenation pump to oxygenate. The seedling density is 667m240 thousand fish fries of the pelteobagrus fulvidraco are thrown.
(6) Timely disinsection
6, month and 14 days, the mixture of copper sulfate and ferrous sulfate (ratio 5: 2) is used for killing insectsThe dosage is 0.6 g/m3。
(7) Supplementary biological bait
5 months and 25 days, the bait cultivating pool 1 is disinfected in the whole pool. And after 6 months and 10 days, the water quality is fertilized by amino acid fertilizer water paste. And pumping water from the bait culture pond 1 to the fry culture pond after 6 months and 15 days, wherein the water adding amount is increased by 20cm when the water level is increased. Mugwort on the shoal is gradually immersed in water and starts to wet out.
And 6, 1 day in 6 months, and sterilizing the whole bait culture pond 2. And 6, 15 days after the month, fertilizing the water quality by using the amino acid fertilizer water paste. And pumping water from the bait culture pond 2 to the fry culture pond after 20 days in 6 months, wherein the water adding amount is increased by 20cm for the water level.
(8) Feeding fodder
Feeding pelteobagrus fulvidraco pellet feed with the particle size of 1.5mm in 6-21 days, wherein after puffing, the feeding amount of the pelteobagrus fulvidraco pellet feed for the first day is 3% of the mass of the fish body, feeding the pelteobagrus fulvidraco pellet feed along a water area planted with artemisia argyi, feeding the pelteobagrus fulvidraco pellet feed at a fixed point of 10 m after 3 days, gradually reducing feeding points, erecting 1 feeding machine for fixed point feeding in each pond after 10 days, and increasing the feeding amount to.
(9) Regularly killing insects
And (5) respectively spraying a mixture of copper sulfate and ferrous sulfate (the ratio is 5: 2) on the mixture for 14 days in 7 months and 30 days in 8 months to prevent the occurrence of parasite diseases.
(10) Regular water regulation
And 6, 30-10, 20 days, the microecologics, the water disinfectants and the substrate modifying agents are recycled, and the mode is specifically a mode of 2+1+1, namely: after 2 times of using bacillus subtilis (microecological preparation) every time, diluting and soaking for 1 hour by 10 times of water, and uniformly sprinkling the bacillus subtilis (microecological preparation) in the whole pond according to the proportion of 300 g/mu/m; 1-time chlorine dioxide tablets (water disinfectants) are used according to 100 g/mu/m at an interval of 10 days every time, 1-time potassium hydrogen persulfate (substrate modifier) is used after the water disinfectants are used for 2 days, the substrates modifier is used according to 100 g/mu/m for 10 days, and the microecologics are used again, and the steps are recycled.
Example 3: method for improving cultivation survival rate of pelteobagrus fulvidraco fingerlings and preparation method thereof
A method for improving the breeding survival rate of pelteobagrus fulvidraco fingerlings comprises the following steps:
(1) fry rearing pond design
Preparing three ponds, wherein one pond is a seedling culture pond, the other two ponds are bait culture ponds, the middle part of the seedling culture pond is built into a shoal with the height of 25cm and the area of 18 percent of the total area of the pond by using pond bottom mud, and mugwort is planted on the shoal; erecting a fry attaching net frame along the slope of a pond ridge of the fry rearing pond, wherein a plurality of aeration stones are contained in the fry attaching net frame and are connected with an oxygenation pump through pipelines;
(2) bait culture pond design
The area of the bait cultivating pool is 3 multiplied by 667m2；
(3) Seedling culture pond and bait culture pond, grass planting, fertilizer pulling and bottom fixing
Sowing folium Artemisiae Argyi in the seedling culture pond and the bait culture pond, sowing folium Artemisiae Argyi seeds 2m away from the bank of the pond along the periphery of the pond, wherein the sowing region width is 1.8m, and the sowing density is controlled at 10 g folium Artemisiae Argyi seeds/m2；
(4) Water quality for fertilizing
Injecting water into the seedling culture pond 10 days before seedling placing to ensure that the water depth of the seedling culture pond is 30-40 cm, soaking mugwort sowed around the pond into the water 5 days before seedling placing, and then gradually raising the water level to ensure that the water gradually submerges the mugwort on the shoal to enable the mugwort to rot;
(5) fry throwing in
In the early morning or evening of a sunny day, putting the pelteobagrus fulvidraco fry which comes out of the film for 3 days with water into a fry attaching net frame, and starting an oxygenation pump to oxygenate; each 667m240 thousand fish fries of the yellow catfish are put in;
(6) pest control
In order to prevent the yellow catfish fry from being infected with bacterial diseases and parasitic diseases, the following steps are carried out:
the method comprises the following steps: 4 days after the seedlings are placed, the mixture of copper sulfate and ferrous sulfate is used for sprinkling to prevent the occurrence of parasite diseases; firstly, diluting the mixture of copper sulfate and ferrous sulfate by more than 1500 times by using water with the temperature of less than or equal to 60 ℃, wherein the water temperature of a seedling culture pond is 23, and the dosage of the mixture of copper sulfate and ferrous sulfate is 0.6Gram/m3。
Step two: when the body length of the pelteobagrus fulvidraco fry reaches 1.5cm, adding a pharmaceutical composition into the feed according to 2.5% of the mass of the feed, wherein the pharmaceutical composition is prepared by mixing the following raw materials in parts by weight: 8 parts of vitamin K3 powder, 18 parts of Sanhuangsan, 8 parts of Celite, 8 parts of Chinese cabbage powder, 18 parts of aromyclobutanil, 18 parts of compound doxycycline and 8 parts of humifuse euphorbia herb, wherein the feed is fed for 5 days after 1 time per day;
step three: the internal medicine is selected from florfenicol or enrofloxacin, 1 time in 1 day, 3 d-5 d each time, and the dosage is 80g of the internal medicine added in each ton of feed;
(6) regularly performing microscopic examination, and if fish bodies are infected with bacterial diseases and parasitic diseases, performing the following steps:
firstly, a mixture of copper sulfate and ferrous sulfate is used for killing insects, and then chlorine dioxide is used for disinfecting and sterilizing a water body; simultaneously, adding florfenicol or enrofloxacin into the feed;
step two, adding the pharmaceutical composition into the feed according to 2.5 percent of the mass of the feed; feeding for 1 course of treatment. Continuously feeding for 5 days for 1 time per day in each treatment course;
(7) biological bait stubble supplementing
The first bait cultivating pool is disinfected in the whole pool before the seedlings are put in the first bait cultivating pool; the first bait culturing pool is used for fertilizing and culturing water on the day of fry placing in the fry culturing pool, and culturing bait organisms; after the fry rearing ponds are used for killing insects, pumping water from the first bait rearing pond and irrigating the water to the fry rearing pond, wherein the water adding amount is 18cm higher than the water level of the fry rearing pond so as to provide biological bait;
the second bait cultivating pool is disinfected in the whole pool before the seedlings are put; in the second bait culturing pool, on the day of killing insects in the fry culturing pool, fertilizing and culturing water, and culturing bait organisms; pumping water from the second bait culture pond to the fry culture pond 8 days after the fries are put into the pond, and adding water in an amount which is 18cm higher than the water level of the fry culture pond to provide biological bait;
(8) feeding fodder
After the second water injection, feeding pelteobagrus fulvidraco pellet feed with the particle size of 1mm, wherein the feeding amount of the pelteobagrus fulvidraco pellet feed for the first time is 3% of the total mass of pelteobagrus fulvidraco fed in the fry rearing pond, the pelteobagrus fulvidraco pellet feed is fed along a water area planted with artemisia argyi, the pelteobagrus fulvidraco pellet feed is fed every 10 m after 3 days, the feeding points are gradually reduced, after 10 days, 1 bait feeding machine is erected for each pond for feeding at fixed points, and the feeding amount is increased to 8% of the total;
(9) regular water regulation
In 6 to 10 months, the microecologics, the water disinfectants and the substrate modifying agents are recycled, and specifically, the water adjusting and substrate modifying mode is '2 +1+ 1', namely: after the microecologics are used for 2 times, 1 time of water disinfectant is used, 8 days are separated for each time, after the water disinfectant is used for 2 days, the substrate modifier is used for 1 time, and after the substrate modifier is used for 10 days, the microecologics are used again, and the steps are recycled.
The preferred embodiment is: the area of the pond is 3 multiplied by 667m2m2The depth of the pond is 1.8m, and the bottom of the pond is flat.
The preferred embodiment is: the fry attaching net frame consists of net pieces and a frame, the frame is of a wood structure, the specification is 1m multiplied by 0.5m, and the height of the frame body is 6 cm; a groove is formed in the position, 15cm away from the bottom of the pond, of the slope of the pond ridge of the fry rearing pond, the groove depth is 4cm, the groove height is 8cm, and the groove length is 1 m; inserting the fry attached to one side of the long edge of the net frame into the groove, punching a hole in the middle of the frame at the other side, penetrating the hole with a rope, and stretching the fry to the pond ridge for fixing so as to enable the net frame to be arranged in a horizontal state; 4 aeration stones are placed in the fry attaching net frame and are connected with an oxygenation pump on the bank side through a pipeline.
The preferred embodiment is: the mass ratio of the copper sulfate to the ferrous sulfate is 4: 1.
example 4: method for improving cultivation survival rate of pelteobagrus fulvidraco fingerlings
A method for improving the breeding survival rate of pelteobagrus fulvidraco fingerlings comprises the following steps:
(1) fry rearing pond design
Preparing three ponds, wherein one pond is a seedling culture pond, the other two ponds are bait culture ponds, the middle part of the seedling culture pond is built by pond bottom mud into a shoal with the height of 35cm and the area of 22 percent of the total area of the pond, and mugwort is planted on the shoal; erecting a fry attaching net frame along the slope of a pond ridge of the fry rearing pond, wherein a plurality of aeration stones are contained in the fry attaching net frame and are connected with an oxygenation pump through pipelines;
(2) bait culture pond design
The area of the bait cultivating pool is 5 multiplied 667m2；
(3) Seedling culture pond and bait culture pond, grass planting, fertilizer pulling and bottom fixing
Sowing folium Artemisiae Argyi in the seedling culture pond and the bait culture pond, sowing folium Artemisiae Argyi seeds 3 m away from the bank of the pond along the periphery of the pond, wherein the sowing region width is 2.2 m, and the sowing density is controlled at 20 g folium Artemisiae Argyi seeds/m2；
(4) Water quality for fertilizing
Injecting water into the seedling culture pond 10 days before seedling placing to ensure that the water depth of the seedling culture pond is 40cm, soaking mugwort sown around the pond into the water 5 days before seedling placing, and gradually raising the water level to ensure that the water gradually submerges the mugwort on the shoal to enable the mugwort to rot;
(5) fry throwing in
In the early morning or evening of a sunny day, putting the pelteobagrus fulvidraco fry which comes out of the film for 3 days with water into a fry attaching net frame, and starting an oxygenation pump to oxygenate; each 667m260 thousand fish fries of the yellow catfish are put in;
(6) pest control
In order to prevent the yellow catfish fry from being infected with bacterial diseases and parasitic diseases, the following steps are carried out:
the method comprises the following steps: 6 days after the seedlings are placed, the mixture of copper sulfate and ferrous sulfate is used for sprinkling to prevent the occurrence of parasite diseases; firstly, the mixture of copper sulfate and ferrous sulfate is diluted by more than 1500 times by water with the temperature of 55 ℃, the water temperature of a seedling culture pond is 18 ℃, and the dosage of the mixture of copper sulfate and ferrous sulfate is 0.72 g/m3；
Step two: when the body length of the pelteobagrus fulvidraco fry reaches 10.0cm, adding a pharmaceutical composition into the feed according to 3.5% of the mass of the feed, wherein the pharmaceutical composition is prepared by mixing the following raw materials in parts by weight: 10 parts of vitamin K3 powder, 22 parts of Sanhuangsan, 10 parts of Celite, 10 parts of Chinese cabbage powder, 22 parts of aromycellia, 22 parts of compound doxycycline and 10 parts of humifuse euphorbia herb, wherein the feed is fed for 5 days after 1 time per day;
step three: the oral medicine is selected from florfenicol or enrofloxacin, 1 time in 1 day, 5 days each time, and the dosage is 100g of the oral medicine added into each ton of feed; the operation was carried out every 15 days.
(6) Regularly performing microscopic examination, and if fish bodies are infected with bacterial diseases and parasitic diseases, performing the following steps:
firstly, a mixture of copper sulfate and ferrous sulfate is used for killing insects, and then chlorine dioxide is used for disinfecting and sterilizing a water body; simultaneously, adding florfenicol or enrofloxacin into the feed;
step two, adding the pharmaceutical composition into the feed according to 3.5 percent of the mass of the feed; feeding for 1 course of treatment. Continuously feeding for 5 days for 1 time per day in each treatment course;
(7) biological bait stubble supplementing
The first bait cultivating pool is disinfected in the whole pool before the seedlings are put in the first bait cultivating pool; the first bait culturing pool is used for fertilizing and culturing water on the day of fry placing in the fry culturing pool, and culturing bait organisms; after the fry rearing ponds are used for killing insects, pumping water from the first bait rearing pond and irrigating the water to the fry rearing pond, wherein the water adding amount is 22cm higher than the water level of the fry rearing pond so as to provide biological bait;
the second bait cultivating pool is disinfected in the whole pool before the seedlings are put; in the second bait culturing pool, on the day of killing insects in the fry culturing pool, fertilizing and culturing water, and culturing bait organisms; pumping water from the second bait culture pond to the fry culture pond 12 days after the fries are put into the pond, and adding water in an amount which is 22cm higher than the water level of the fry culture pond to provide biological bait;
(8) feeding fodder
After the second water injection, feeding pelteobagrus fulvidraco pellet feed with the particle size of 1.5mm, wherein the feeding amount of the pelteobagrus fulvidraco pellet feed for the first time is 5% of the total mass of pelteobagrus fulvidraco fed in the fry rearing pond, the pelteobagrus fulvidraco pellet feed is fed along a water area planted with artemisia argyi, the pelteobagrus fulvidraco pellet feed is fed every 12 m fixed points after 3 days, the feeding points are gradually reduced, after 10 days, 1 bait feeding machine is erected in each pond for fixed point feeding, and the feeding amount is increased to 10% of the;
(9) regular water regulation
In 6 to 10 months, the microecologics, the water disinfectants and the substrate modifying agents are recycled, and specifically, the water adjusting and substrate modifying mode is '2 +1+ 1', namely: after the microecologics are used for 2 times, 1 time of water disinfectant is used, 10 days are separated for each time, the substrate modifier is used for 1 time after the water disinfectant is used for 2 days, the microecologics are used again after the substrate modifier is used for 10 days, and the steps are recycled. The substrate modifier can be EM bacteria and bacillus.
The preferred embodiment is: the area of the pond is 5 multiplied by 667m2The depth of the pond is 2.4m, and the bottom of the pond is flat.
The preferred embodiment is: the fry attaching net frame consists of net pieces and a frame, the frame is of a wood structure, the specification is 1m multiplied by 0.5m, and the height of the frame body is 6 cm; a groove is formed in the position, 20cm away from the bottom of the pond, of the slope of the pond ridge of the fry rearing pond, the groove depth is 4-5cm, the groove height is 8cm, and the groove length is 1 m; inserting the fry attached to one side of the long edge of the net frame into the groove, punching a hole in the middle of the frame at the other side, penetrating the hole with a rope, and stretching the fry to the pond ridge for fixing so as to enable the net frame to be arranged in a horizontal state; 6 aeration stones are placed in the fry attaching net frame and are connected with an oxygenation pump on the bank side through a pipeline.
The preferred embodiment is: the mass ratio of the copper sulfate to the ferrous sulfate is 6: 1.
the foregoing is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting thereof in any way, and any modifications or variations thereof that fall within the spirit of the invention are intended to be included within the scope thereof.
Claims (4)
1. A method for improving the breeding survival rate of pelteobagrus fulvidraco fingerlings is characterized in that: the method comprises the following steps:
(1) fry rearing pond design
Preparing three ponds, wherein one pond is a seedling culture pond, the other two ponds are bait culture ponds, the middle part of the seedling culture pond is built into a shoal with the height of 25-35cm and the area of 18-22% of the total area of the pond by using pond bottom mud, and mugwort is planted on the shoal; erecting a fry attaching net frame along the slope of a pond ridge of the fry rearing pond, wherein a plurality of aeration stones are contained in the fry attaching net frame and are connected with an oxygenation pump through pipelines;
(2) bait culture pond design
The area of the bait cultivating pool is 3 multiplied by 667m2~5×667m2；
(3) Seedling culture pond and bait culture pond, grass planting, fertilizer pulling and bottom fixing
Sowing mugwort seeds in the seedling cultivation pool and the bait cultivation pool, sowing mugwort seeds 2-3 meters away from the bank of the pond along the periphery of the pond, wherein the width of a sowing area is 1.8-2.2 meters, and the sowing density is controlled to be 10-20 g of mugwort seeds/m2；
(4) Water quality for fertilizing
Injecting water into the seedling culture pond 10 days before seedling placing to ensure that the water depth of the seedling culture pond is 30-40 cm, soaking mugwort sowed around the pond into the water 5 days before seedling placing, and then gradually raising the water level to ensure that the water gradually submerges the mugwort on the shoal to enable the mugwort to rot;
(5) fry throwing in
In the early morning or evening of a sunny day, putting the pelteobagrus fulvidraco fry which comes out of the film for 3 days with water into a fry attaching net frame, and starting an oxygenation pump to oxygenate; each 667m240-60 ten thousand fish tails of pelteobagrus fulvidraco fish fries are thrown;
(6) pest control
In order to prevent the yellow catfish fry from being infected with bacterial diseases and parasitic diseases, the following steps are carried out:
the method comprises the following steps: 4-6 days after the seedlings are placed, the mixture of copper sulfate and ferrous sulfate is used for sprinkling to prevent the occurrence of parasite diseases; firstly, diluting the mixture of copper sulfate and ferrous sulfate by more than 1500 times by using water with the temperature of less than or equal to 60 ℃, and when the water temperature of the seedling culture pond is more than 22 ℃, the dosage of the mixture of copper sulfate and ferrous sulfate is 0.6 g/m30.7g/m3When the water temperature of the seedling culture pond is 10-22 ℃, the dosage of the mixture of copper sulfate and ferrous sulfate is 0.7g/m30.75 g/m3；
Step two: when the body length of the pelteobagrus fulvidraco fry reaches 1.5cm-10.0cm, adding a pharmaceutical composition into the feed according to 2.5-3.5% of the mass of the feed, wherein the pharmaceutical composition is prepared by mixing the following raw materials in parts by weight: 8-10 parts of vitamin K3 powder, 18-22 parts of Sanhuang powder, 8-10 parts of Celite, 8-10 parts of Chinese globeflower powder, 18-22 parts of Fancorum bengal, 18-22 parts of compound doxycycline and 8-10 parts of humifuse euphorbia herb, wherein the feed is continuously fed for 5 days after 1 time per day;
step three: the internal medicine is selected from florfenicol or enrofloxacin 1 time a day, 3 d-5 d each time, and the dosage is 80-100g of the internal medicine added into each ton of feed;
(6) regularly performing microscopic examination, and if fish bodies are infected with bacterial diseases and parasitic diseases, performing the following steps:
firstly, a mixture of copper sulfate and ferrous sulfate is used for killing insects, and then chlorine dioxide is used for disinfecting and sterilizing a water body; simultaneously, adding florfenicol or enrofloxacin into the feed;
step two, adding the pharmaceutical composition into the feed according to 2.5-3.5% of the mass of the feed; feeding for 1 course of treatment;
continuously feeding for 5 days for 1 time per day in each treatment course;
(7) biological bait stubble supplementing
The first bait cultivating pool is disinfected in the whole pool before the seedlings are put in the first bait cultivating pool; the first bait culturing pool is used for fertilizing and culturing water on the day of fry placing in the fry culturing pool, and culturing bait organisms; after the fry rearing ponds are used for killing insects, pumping water from the first bait rearing pond and irrigating the water to the fry rearing pond, wherein the water adding amount is 18-22cm higher than the water level of the fry rearing pond so as to provide biological bait;
the second bait cultivating pool is disinfected in the whole pool before the seedlings are put; in the second bait culturing pool, on the day of killing insects in the fry culturing pool, fertilizing and culturing water, and culturing bait organisms; pumping water from the second bait culture pond to the fry culture pond 8-12 days after the fries are put into the pond, and adding 18-22cm of water to increase the water level of the fry culture pond so as to provide biological bait;
(8) feeding fodder
After the second water injection, feeding the pelteobagrus fulvidraco pellet feed with the particle size of 1-1.5mm, wherein the feeding amount of the pelteobagrus fulvidraco pellet feed for the first time is 3-5% of the total mass of the pelteobagrus fulvidraco fed in the fry rearing pond, the pelteobagrus fulvidraco pellet feed is fed along a water area planted with artemisia argyi, the pelteobagrus fulvidraco pellet feed is fed every 10-12 m after 3 days, the feeding points are gradually reduced, after 10 days, 1 bait feeding machine is erected in each pond for feeding at fixed points, and the feeding amount is increased to 8-10% of;
(9) regular water regulation
In 6 to 10 months, the microecologics, the water disinfectants and the substrate modifying agents are recycled, and specifically, the water adjusting and substrate modifying mode is '2 +1+ 1', namely: after the microecologics are used for 2 times, 1 time of water disinfectant is used, 8-10 days are spaced for each time, after the water disinfectant is used for 2 days, the substrate modifier is used for 1 time, and after the substrate modifier is used for 10 days, the microecologics are used again, and the steps are recycled.
2. The method for improving the breeding survival rate of the pelteobagrus fulvidraco offspring seeds according to claim 1, which is characterized in that: the area of the pond is 3 multiplied by 667m2~5×667m2The depth of the pond is 1.8-2.4m, and the bottom of the pond is flat.
3. The method for improving the breeding survival rate of the pelteobagrus fulvidraco offspring seeds according to claim 1, which is characterized in that: the fry attaching net frame consists of net pieces and a frame, the frame is of a wood structure, the specification is 1m multiplied by 0.5m, and the height of the frame body is 6 cm; a groove is formed in the place, 15-20cm away from the bottom of the pond, of the slope of the pond ridge of the fry rearing pond, the groove depth is 4-5cm, the groove height is 8cm, and the groove length is 1 m; inserting the fry attached to one side of the long edge of the net frame into the groove, punching a hole in the middle of the frame at the other side, penetrating the hole with a rope, and stretching the fry to the pond ridge for fixing so as to enable the net frame to be arranged in a horizontal state; 4-6 aeration stones are placed in the fry attaching net frame and are connected with an oxygenation pump on the bank side through a pipeline.
4. The method for improving the breeding survival rate of the pelteobagrus fulvidraco offspring seeds according to claim 1, which is characterized in that: the mass ratio of the copper sulfate to the ferrous sulfate is 4-6: 1.
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