First, seedlings are generally sourced from natural, semi-artificial or proliferating seedlings. From April to September every year, mature broodstock begin spawning after each tide, producing between 10,000 and 25,000 eggs per tail. The next time the tide is reached, large numbers of fry appear in seawater with a salinity of 10 ‰ - A 20-kilometer river, river, and sea converging areas carry out feeding and so on. Therefore, natural fish fry collection period is from May to October, but June-August is better, especially after early summer high tide. The fork net around the head can catch backwaters at the estuary, and the white seedlings on the shoal can be captured in the shoals (tidal flats), Jishuitan, and ditches into the sea. Ocm-5.Ocm fry as a cultured seed.
Second, pond selection
1. The site selection method of big eel-bearing fish culture includes: polyculture of shrimp ponds or monoculture, tidal flat culture, breeding of low-yield fields, etc., but it is mainly based on tidal flat culture and saline-alkali land and low-yielding farms. Adequate water source, convenient irrigation and drainage, fertile soil, muddy or sandy cohesive soil structure, good water quality, strong soil water retention and fertility, no underground cold soaking water seepage, mud depth 1.0m-1.5m, no industrial pollution source ( In particular, oil, three wastes, pesticides, etc. are discharged into the area, and there are appropriate freshwater sources injected throughout the year (there is a good injection of fertilizer and water from the pond and shrimp ponds), moderate proportion of seawater, abundant nutrient salts, fertile water, large tidal range, and calm seas. The high tide area is better. The tidal flat is flat and should have a certain slope (usually 1:1000). The pool bottom tidal flat should be higher than the low tide line for drainage, sunbathing and fertilization to cultivate benthic diatoms. At the same time, suitable for benthic algae breeding and large waters Bullet-bearing fish live in growth and is conducive to the construction of pool embankments, water supply and power supply is guaranteed, and convenient transportation is appropriate.
2. The pond area Each pond is suitable for 2 mu - 10 mu, usually 3 mu - 5 mu. The pond with an area of ​​more than 10 mu can be converted into a small pond of 3 mu - 5 mu. If the pond area is too large, the daily management is inconvenient, and it is difficult to put enough seeds at one time. If the pond area is too small, it is not conducive to the habitat growth of the big salamander, and the yield per unit area is not high, which affects the economic benefits of breeding.
Third, aquaculture management
1, leveling the field of low-yielding fields, salty land intensive cultivation 1 - 2 times, the depth of 20cm-30cm is appropriate, leveling into a rake; tidal flat straight into a rake, outside the network to prevent escape, the dam should be higher than the water surface 30cm, inside the levee can Lay the plastic film and infiltrate the bottom of the mud about 30cm. Add a barrier net or other anti-escape facilities to prevent the mudflater from escaping and the invasion of alien predators. The pool dike will not leak.
2. The fish of the fish is mainly fed on benthic brown-yellow diatoms, followed by blue-green algae. They generally do not directly feed on rice bran, fishmeal, artificial compound feed, etc., and they do not find the phenomenon of mutual-residual food. Only good and sufficient algae are found. Only in this way can the normal and rapid growth of the mudskipper be promoted. Therefore, it is very important to promote algae reproduction at the bottom of the pool and on the beach. 200kg/mu of lime or 200g/mu of chlorine dioxide is used to disinfect clear ponds to kill pathogens and clear the enemy's harmful organisms such as goby and scorpionfish. The new pond is generally exposed at the bottom of the pond and applied to 15 kg/mu -30 kg/mu rice bran after cracking. The water injection is 5cm-1Ocm. Beat with a cultivator and keep the seawater 1Ocm before applying fermented organic fertilizer (pig, cattle, Chickens, ducks, white pigeons and other manures are preferably manure and white pigeon manure. 1OOkg/-200kg/mu is used as base fertilizer. After 3 days and 4 days, seawater is injected. After 6 days and 7 days, freshwater is injected. Seawater accounts for 1/1. 3, freshwater accounts for 2/3, and timely use of beneficial microbial agents; has been used for many years of breeding ponds, the amount of base fertilizer should not be less, should wait until the water becomes thick after the seedlings can be put aquaculture.
3, the stocking stocking time is more in the summer, the seedling period is April to May is better, the seed size can be 1cm-2cm white seedlings, if the summer and autumn culture, release should be June - In September, the seed size should be 5cm or more in length, which can increase the survival rate of overwintering. The quality of seedlings involves the survival rate of aquaculture, the adaptability of seedlings to environmental changes and resistance to diseases, the growth of fry, the quality of adult fish, yield, and benefits. It is the basis of culture, and the quality must be strictly controlled, and the surface of the fry must be required. Injury, eyes, pectoral fins, dorsal fins, complete caudal fins, no mechanical damage, full scales, no scales off, wet and bright surface, individual symmetry, lively and robust, activities, crawling, jumping and other strong ability to use the hand In the swing above the fry can see the turmoil of the turmoil, no lesions, and the yellow of the fry feces is a healthy seed and the feces is bloody, and the navel is red.
The 1cm-2cm seedlings are usually made of plastic film bags made of polyethylene. Each bag contains 1/3 of water. The fish is then filled with oxygen, and the bag is sealed tightly. It is transported in a foam box and transported in bags. Seedlings of 4000 to 6000 tails; natural seedlings of 3cm to 5cm in length, a small amount of mud oil or a small amount of salt water can be added to the foam box, and a small number of holes can be placed around the foam box with chopsticks. Shipping time Within 12 hours, the survival rate can reach 95%-100%. Do not buy drugs that have been poisoned, transported for too long, or raised for long periods of time. Otherwise, the survival rate of the culture will be low. There may be seedlings of green eel-coated fish and shell-bearing fry, and the aquaculture production and economic efficiency are relatively low. The seedlings should be planted in the evening or on a cloudy day. Generally, the seedling density is set at 3000 to 10,000 tails/mu. The specific size is 1cm to 3cm small seedlings of 8000 tails/mu - 10,000 tails/mu; 3cm-5cm seedlings planting 6000 tail / acre-8000 tail / acre; body length 5cm above the large-size seed 3000 / acre-5000 tail / acre, poor condition of the pond should be appropriate to reduce the stocking density, to prevent feed biological supply Insufficient, breeding cycle becomes longer. It is best to place seed of the same size at one time in a short period of time. The successive stocking of seedlings will cause individual differences in growth and inconvenience in capturing the listed business. Too high stocking density will result in insufficient supply of algae in ponds and sluggish growth of mudflat fish. Individual size of commodity fish is thin and small, and it is also difficult to stockpile after stocking. Dachi should use fine mesh to form a small pool to raise the fry for a period of time and then dismantle the fence. The seedlings were soaked in 1.0 ppm-1.5 ppm povidone-iodine for 5 minutes and 10 minutes before being introduced into the pond for surface disinfection.
4, algae cultivation and water level management generally after 10 days -15 days, the bottom algae tip in the pond gradually reduced, the pool of water should be drained in time for the sun floor fertilizer. The new pond can be applied to mature organic fertilizer, such as fermented chicken manure 40kg/mu; aging ponds can be applied inorganic fertilizer, such as urea 1.5kg/mu, superphosphate 0.5kg/mu, and then injected fresh seawater to promote benthic silicon Algae breeding. Breeding of large-scale salamander requires clear water quality, with a salinity of about 10 ,, and the water level should not be too high, in order to facilitate the light to fully act on the algae tip and promote the growth and reproduction of the bottom algae. When the white seedling grows 1cm-2cm in length, the water level maintains 5cm-10cm; after releasing the seedling for 1day-2 days, it drains to the water 0.5-1.0cm, until the seedling jump is visible, and the white seedling can see the seedling jump in about 2 weeks, the longest To reach 25 days, seedlings of 3cm-4cm body length can be seedling jumped after 5 days to 6 days; drain water after 2 months and apply 25kg/mu-30kg/mu fine or 20kg/mu-25kg/ Mu wheat skin dried, 2 days (preferably fine soaking wet) into the sea water 5cm-6cm, 3 days -4 days after the drainage to 1cm-2cm; in the middle and late breeding, pool water depth is maintained at 5cm-10cm. Water is added once every 3 days to 4 days in summer, and water is added once a week in winter and spring. In summer, in order to prevent the water salinity from increasing due to excessive evaporation of water, fresh water can be replenished in a timely manner. In places where fresh water is injected too much, part of the seawater can be properly replenished. Each month, the pond is dried for 5 days to 7 days, dried and dried, and 50 kg/mu of fresh mandarin shrimp or fermented chicken manure is applied.
Fourth, disease prevention and control of large eel eel fish adaptability, and generally very rare, so the prevention and treatment should be the main prevention, if there is high temperature, water quality, low temperature frost, water shortage, poor management, etc. will occur following common diseases :
1. Bacterial Diseases Diseased fish has abdominal muscle decay and red fins. Rainy weather can be treated with bromine chloride in the whole pool. When the weather is fine, drain the pool water for 1 to 2 days, then inject fresh seawater and keep the water level 1cm to 2cm. Use the gallnut to drain the liquid. Measures.
2, frost due to the sand bottom can not dig deep hole, the winter temperature dropped when the fish is difficult to resist the cold and freeze to death, so the sandy bottom sediment should not be large eel fish farming.
3. The predatory creatures are mainly ponds and herons. They can be clothed over the pond, used firecrackers and hammers, or be set in the middle of the pond to drive them away. Fish and crabs are predators, etc. They can be used when ponds are flooded. The purpose of the fine mesh net is to remove.
4. For pesticides such as triazophos, sodium cyanide, etc., a flood-control ring ditch should be established, and sub-dams or drainage ditch can be built at the boundary of farmland to prevent seepage and prevent excessive water and pesticide-contaminated water. Into the fish pond. When the fish body has been poisoned, it is necessary to change the water several times in a timely manner to reduce the amount of pesticides and reduce losses. When the pesticide poisons and there is no place to drain, it can be filled with water 30cm-40cm, then the fish body will drill into the sediment.
5. The green mud moss blue mud moss is a general term for Spirogyra, Double Star Algae, and Spirulina. It grows in the shallow water at the time of warmer weather and grows into filaments. When it dies and dies, it breaks off from the bottom of the pool and forms chaos. ,Fried fishes are mistakenly entangled in them and consume large amounts of nutrients in the body of water, making the pool water thinner, which in turn affects the growth of diatoms. Most of the ponds do not receive water because of long-term water salinity caused by too low salinity, prevention can be in seedlings. Before the stocking, the whole pool is sprinkled with quicklime (75kg/mu). The treatment can be used to remove seawater with excessive salinity or manually removed.
V. Harvesting methods include water trapping, fishing, bamboo trapping, excavation, and trapping on the train network. Water trapping, trapping by trains, trapping by bamboo traps, etc. can be carried out in summer and autumn when the water temperature is relatively high, and winter trout with lower water temperature cannot be carried out, and water trapping is also constrained by the tide water, and can only be collected when the tide is large; Digging and paving can be carried out throughout the year, but it is labor-intensive and requires a certain amount of technology.
Sixth, economic benefit analysis The breeding cycle 1 year - 2 years (rotational rotation), commercial fish specifications 15g / tail -25g / tail, output 50kg / acre-120kg / acre, the market price of 60 yuan / kg-200 yuan / kg The breeding cost is about 1,500 yuan/mu -3000 yuan/mu, and the profit is about 2,000 yuan/mu - 5,000 yuan/mu.
Single Dome Halogen Operating Light belongs to full refelection Operation Theatre Lights .
Features
1.The halogen reflective shadowless lamp is widely used in various operation lighting occasions in hospital and clinics.
2. Full close streamline lamp-body design of the halogen operation theatre light completely meets the demand of the sterilization and high standard of laminar flow purification in operation room.
3. Adopting more than 5280 slices of reflection mirror, guaranteeing 1200 mm lighting depth.
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5. The back-up bulb will start work within 0.2 seconds automatically in case the main battery is dead, ensuring the continuation of surgical operation. There`s failure indication in the handle control panel to recommend the bulb to be changed after operation.
6. The detachable handle jacket can be used for high temperature (≤134℃) sterilized.
7. Digital-control circuit offers many functions, with 10 segment brightness selection stepless lighting regulation, brightness memory, low voltage
start-up and power on self test etc.
8. The life-span of OSRAM halogen bulb is up to 1500 hours. The bulbs can be changed easily.
9. High thermostability Germany ORSAM lamp socket.
10.Balance arm can be optional Germany imported or domestic.
11. mould Die-casting Eight edge type Revolving arm.
Types of the lamp domes have 500mm diameter dome and 700mm diameter dome for Choice
Installation way: Ceilling installation type and floor standing type for Choice
Our company
Shangdong province is the main machinery production base in China.
KANGERJIAN Medical Technology Co., Ltd. is a group of senior lighting design expert and machinery manufacturing expert company with 20years experience and factory locating in the east city--the hometown of confucius--Qufu in Shandong province, China.
The Company has passed the ISO:9001:2008 quality system certification, ISO13485:2003 quality system certification, CE certification and CFDA certification, so that the enterprise management standards and product quality is relatively connected to expand the international market for enterprises to lay the foundation.
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