3. Broiler rearing (1) Feeding: In combination with compound feed and animal feed, the amount of feed is 3% to 4% of the shrimp body weight, twice a day, in the morning, mainly in pellets, and in animals in the evening. The main food is bait, and the amount of feed in the evening accounts for 70% to 80% of the whole day. (2) Water quality: Contaminate once every other day to remove residual baits and excrement. Change the water every 10 to 15 days. Change the water every time by 1/3. The lime is sporadically splashed at a dosage of 7.5 kilograms per acre, which kills germs and adjusts the pH, so that the broodstock can successfully complete wintering, mating and holding eggs in a good ecological environment. 4. Breeding method (1) Water temperature: About 25 days at 25 to 28°C, pick up the eggs and pick them up every 10 to 15 days. (2) Incubation in a pool: The picked egg-holding shrimps should be kept in a special pool, the water depth should be controlled at about 40 cm, and the egg-holding shrimps should be placed in the spawning pool. The iron frame and the polyethylene mesh sheet should be composed of 70 cm in length and 35 cm in length. The height of 7 cm box, each box can hold 20 to 30 tails of egg shrimp. Water temperature is controlled at 28～30°C. The color of the fertilized egg gradually deepens from light yellow, yellow, orange, red to dark red. The egg ball expands slightly, the eyeball appears slightly, the appendages form, and finally the egg drop forms and forms. shrimp. The newly hatched juvenile shrimp still adheres to the mother's body and is protected by the broodstock. After about 7 days, it completely leaves the mother's body. At this time, the length of the juvenile shrimp is 0.7-0.8 cm. When the density of the seedlings in the pond reaches a certain amount, the hatching box can be removed and put into another pool for further cultivation. Generally, the density of shrimps is 1500 to 2000 tails per square meter, and hatching pools should be put into concealed facilities such as tiles and mesh sheets. For their habitat. 5. Cultivation and management of larvae After the spawning frame is removed, the larvae should be fed with open baits in the original pool, fed twice daily, mixed feed in the morning, and puffed animal feed in the evening. Periodically discharge sewage, suck out residual baits and excrement, change water by 1/3 every 7 days, and use microbial preparation every 15 days. The water depth is maintained at 40 to 60 cm. The water temperature is 25 to 26°C in the early stage. When the larvae are cultivated to 1.2 cm or more, they can be used for sale and subculture. The most suitable specification for the pond culture is 2 to 3 cm. 6. The transport time of shrimp seedlings should not exceed 3 hours, otherwise it will affect the survival rate. Third, to develop shrimp management and methods 1. Farming area (1) Pool pond: an area of ​​5 to 7 acres, pool surface width of not less than 2 meters, water depth of 0.8 to 1.5 meters, rectangle is appropriate. After using the winter dry ponds, remove excess silt in the pool and leave 10-20 cm of mature soil. The cleared sludge can be used to repair and reinforce the pool. Before the stocking, the dry pond is bathed for 15 to 20 days, so that the bottom of the pond is hard and the cracks are small. The surrounding area of ​​the pool is covered with calcium-plastic plates and mesh to make the fence facilities. It is 3 to 4 meters away from the pool at the end of the pond and placed. A circle of flat tiles for concealed use. (2) Cement pond: The area is 20 square meters, the water depth is 1 meter, and the drainage system is good. The roof of the cement pool needs to be able to see the sunlight, and concealed flat tiles are placed on the bottom of the pool. 2. Clear ponds and disinfection are mainly based on quicklime and must be disinfected 15 days prior to shrimp release. For example, there are Krill crawfish in the pond, but also need to use "fish and shrimp on the 2nd", the amount of 0.2 ~ 0.3 grams / cubic meter drug kill. 3. The water inlet and the water inlet of the water are good and non-polluting. The water inlet must be installed with a water inlet screen. Generally, a 80 mesh sieve is used. The shrimp ponds were fed 50 cm into the water 10 days before the lower pond, and then organic fertilizers such as fermented chicken, swine manure, and grass green manure were applied. The amount of mu was 50 kg. The compound fertilizer used in the cement pool is 15-20 kg per mu, so that the pH of the pool water is between 7.5 and 8.5, and the transparency is 30-40 cm. Planting turf with plants such as Hydrilla verticillata, Vallisneria, water spinach, and water peanuts accounts for 1/3 of the total area of ​​pool ponds and is used as a shelter for shrimps. 4. The stocking time of shrimp species is from late April to late May, and the water temperature is stable above 18°C. Shrimp quality requirements for the body surface bright and clean, complete limb integrity, no injuries, disease-free, robust physique. Stocking specifications are 2 to 3 centimeters, stocking 3500 to 4500 tails per acre, and cement tanks stocking 15 to 20 tails per square meter. 5. Precautions when laying seedlings The pond water level is required to be between 0.8 and 1.0 meters when the seedlings are released, which is conducive to keeping the water temperature relatively stable. Each shrimp pond should be planted once, and at the same time pay attention to slowly adjust the temperature difference time from 15 to 20 minutes. The temperature of the water in the shipping box is basically the same as the pool water temperature and then put into the pool. When stocking, they should be stocked in the shallow water around the shrimp ponds. It is not appropriate to mix carnivorous fish and other shrimps. It is appropriate to stock some large-sized cutlery and squid to regulate the water quality and to report the lack of oxygen. 6. Reasonable feeding (1) Type of bait: First, vegetable diet, soybeans, bean cakes, wheat, corn, etc., must be cooked and fed; second, animal food, small trash fish, crushing snail, river Pork meat, etc.; third is compound feed. (2) Feeding amount of bait: When the initial size is 2 to 5 cm, the daily feeding amount is 0.1 to 1.5 kg per mu. When the medium-term specification is 6 to 10 centimeters, the daily feeding rate is 5%, and the daily dosage of the mu is 7 to 10 kilograms. Late specifications 11 to 15 centimeters, the daily feeding amount is 3% of the shrimp body weight, and the daily dosage of the mu is 2 to 6 kg. If it is to cast fresh material, it must be properly calculated above this reference number, and be flexible depending on the weather, water temperature, and water quality. (3) Feeding methods: Generally two times a day, in the morning and evening, and mainly in the evening, (accounting for 80% of the whole day), and do a good job of “Four Sets and Four Looksâ€. The method of feeding is uniform feeding at the shore and shallow water. Feeding in the morning should be farther from Chihtan Beach. In the evening, it is closer to the pool beach, and additional bait stations can also be added around the pool to observe shrimp eating conditions. The choice of bait was to feed fish carp and crush the pellets in the early stage, small trash fish in the middle and later stages, crushing snails, and pellet feed. 7. Water quality management Water quality requirements are “fat, cool, live, tenderâ€. In the early stage, the main body was fertilizer and water, with a transparency of 25 centimeters. In the middle and later stages, water and water were exchanged. The interval was 15 days and the transparency was 30 to 40 centimeters. From mid-May to mid-September, microbiological preparations are used to activate aerators for 1 to 2 hours at noon on a sunny day to increase dissolved oxygen in the pool and eliminate harmful substances such as ammonia nitrogen in the water body. Regular use of quicklime, 15 to 20 days interval, 1 to 5 meters of water per acre dosage of 5 to 7.5 kg, maintaining the pool water pH value of 7.5 to 8.5. 8. Day-to-day management is usually done in a busy manner. In the morning, it mainly checks for residual baits so as to adjust the amount of bait on the day. At noon, the water temperature, pU value, ammonia nitrogen, nitrous oxide and other harmful substances shall be determined. The ammonia nitrogen shall not exceed 0.5 g/ Cubic and nitrous nitrogen must not exceed 0.2 g/m3. Observe changes in pool water. In the evening or night, observe the lobster activity and eating conditions. Frequently inspect and reinforce the anti-escape facilities for maintenance and reinforcement. During the typhoon storm, special attention should be paid to preventing escape. 9. Prevention of predators and diseases Predators include mice, frogs, otters, etc., and usually do a good job of eradicating rats in time. In spring and summer, frog eggs and cockroaches are often removed. At present, no fulminant or epidemic disease has been discovered. Regular prevention and disinfection are mainly used. Ecological control methods are used to periodically check whether there are ciliates, polychaetes, bell-shaped insects, etc. The principle of "prevention from stress and management" is to implement pollution-free and healthy breeding. 10. Shrimp fishing and transport culture time 160 to 180 days, each individual up to 75 to 100 grams (50 grams or more can be listed). Fishing time from the beginning of September to the beginning of November, taking into account the increase in economic efficiency staggered season listing, the use of greenhouse maintenance to New Year's Day, the Spring Festival. Fishing methods can be trapped in shrimp cages, counter-water traps, and dry ponds. The transportation method can be shipped by using foam boxes with holes punched in the baskets and boxes. Before transporting, the shrimps can be washed and put in a box. The weight of each box can be 10 to 15 kg, and a small amount of water can be placed on the boxes. IV. Economic Benefit Analysis 1. Introduction and breeding of 22,000 tails were introduced, the harvested weight was 683.4 kilograms, the price was 79 yuan per kilogram, and the output value was 54114 yuan. Expenditure 39,716 yuan, including: 15,000 yuan for shrimp, 4,700 yuan for feed, 2016 yuan for fertilizers, 3,000 yuan for utilities, 8,000 yuan for pool rent, and 7,000 yuan for labor. Profit is 14,398 yuan. 2. Shrimp breeding area of ​​280 square meters, shrimp group 1539, breeding shrimp size of 1.2 to 3.5 centimeters, the number of 385,000, the output value of 311,000 yuan. The cost is 182,000 yuan, of which: 22,000 yuan for shrimp, 5,000 yuan for feed, 80,000 yuan for water and electricity, 24,000 yuan for pool, 36,000 yuan for labor, and 15,000 yuan for miscellaneous expenses. Profit of 129,000 yuan (460 yuan / square meter). 3. The aquaculture production of cement ponds is 6,473 kilograms, the price is 70 yuan per kilogram, and the output value is 453,000 yuan. The cost is 281,000 yuan. Among them, 12.3 million were for shrimp, 32,000 for feed, 32,000 for rent, 0.4 million for fertilizer, 32,000 for water and electricity, 42,000 for labor, and 16,000 for miscellaneous. The profit was 172,000 yuan (36.2 yuan/square meter). 4. Pond culture yield 5,449 kg, 227 kg per mu, price 70 yuan / kg, the output value of 381,000 yuan, mu production value 15,875 yuan. The cost is 181,000 yuan, of which: 106,000 yuan for shrimps, 41,000 yuan for feed, 0.4 million yuan for fertilizers, 0.34 million yuan for utilities, 0.34 million yuan for fences, 10,000 yuan for labor, 12,000 yuan for rent, and 0.1 million yuan for miscellaneous expenses . The profit is 200,000 yuan and the profit is 8,333 yuan. V. ANALYSIS AND DISCUSSION 1. Adjusting the Parent Species of Shrimp Specification Parent species of shrimp need to be adjusted to 10 to 12 centimeters due to the late introduction time and the specification is too small. The time for picking eggs should be advanced from late March to early March. 2. Gradually promote cement pool farming Use free-range Macrobrachium sulphureus nursery facilities, adjust and renovate the greenhouse area, and develop freshwater lobster farming in Australia. From the current analysis of the cement pool yield up to 907 kilograms (1.36 kilograms per square meter), the benefit per mu up to 24,145 yuan. 3. Further research to solve the Australian freshwater lobster feedstuffs from the breeding process shows that the shrimp needs a relatively high proportion of animal feed, according to my successful experience of farming squid, can learn from the practice of squid feed fish matching pool culture, cement pool farming In the method, the matching of the bait fish pond and the culture pond is 1:1, and the pond culture lobster matching is 1:3. In addition, it can develop supporting snails for aquaculture to solve the source of feed. Author: Jiangsu Wujiang Aquatic Technology Promotion Station
The groundbreaking four-chambered structure, differing from the conventional three-chambered structure, has more stable and safer design. The integrated panel design, in combination with the smooth and elegant line type, artistic terminal dust cover design and incomparable production process, creates an aesthetic visual experience and embodies a unique fashion.
Bed Head Unit For Icu,Hospital Bed Head Unit For Icu,Bed Head Units Hospital, Bed Head Hospital Equipment Unit
Hunan Eter Electronic Medical Project Stock Co., Ltd. , http://www.eter-tech.com