Juvenile breeding requires high level of technical management and must adopt a set of scientific feeding and management techniques to increase the survival rate of juveniles. Because of the long breeding season of crickets, the hatching time of larvae is also inconsistent, and the individuals vary in size. Each year, young larvae are hatched soon after the autumn, and some have not yet been able to feed and grow into hibernation. Due to the juvenile body that is newly hatched (generally about 4 grams), it is young, poor in feeding ability, and weak in disease resistance. Many breeding farms have a higher mortality rate of juveniles that were hatched because of management technology. Therefore, it is technically difficult to raise juveniles and increase their survival rate. The author in the years of juvenile feeding, summed up a set of effective methods of raising young children, the current price is as follows.
First, Science Feeding and Feeding Juveniles require the use of high-quality, fresh, comprehensive nutrition, good palatability, and high protein content. General larvae after hatching 2 to 3 days after the absorption of the yolk sac, they eat when they open, then you can feed some small red worms, chironomid larvae, reeling silk, cooked egg yolk and other foods. After feeding for 7 days, fresh pork liver, minced fresh fish, snails, and animal organs can be fed, and the conditions can be fed artificially. (Because wolfberry is rich in protein and various amino acids and minerals, Feeding quail feeding larvae is fast growing, low cost and high survival rate. Feeding larvae must adhere to the "four rules": that is, regular, fixed-point, qualitative, quantitative, and raise the juvenile deli feeding habits. The high temperature season is fed once at 9 o'clock and once at 5 o'clock in the afternoon. After autumn, feed it once a day. Feed must be placed on the food table near the water surface. The food table can be set at 10 centimeters underwater with a wooden puller or asbestos tile to a 25 degree slope. In order to avoid contention and biting during the juvenile feeding, several additional feeding points can be set. The amount of food to be eaten depends on the actual feeding situation of the baby, so that the juvenile eats and feeds without surplus. When the water temperature is 25Â°C to 30Â°C, the general feeding amount may account for 10% to 20% of the juvenile weight. The dumplings required were fresh, no rot, and no mildew. Every day before the food is eaten, it is necessary to clean and sterilize the food table to prevent pollution and control the water quality.
2. Strict water quality management The skin is delicate and vulnerable to external mechanical damage. In addition, the newly hatched youngsters have bad habits of biting each other. They are easily bitten in the case of high-density artificial feeding, and the life of the injured person is greatly reduced. In pool water with poor water quality, it is easy to be infected and die. Therefore, raising juveniles requires the water quality to be tender, fresh, light green, non-polluting and pathogen-free. The transparency is generally about 25 cm and the pH is 7-8. Due to the fact that the young and small ponds are shallow, the water is shallow (generally the water depth is 20 to 30 centimeters), and the stocking density is high, the water quality is extremely perishable. The water must be changed within 2 to 3 days. The amount of water exchanged is 1/3 of the total amount of water. about. Change the water temperature to keep the same with the water temperature in the aquaculture pond. It is better to keep the greenish water. Some aquatic plants such as water hyacinths, water lettuces, and water peanuts can be placed in the culture ponds. This will enable the juveniles to grow under covert conditions, reduce juveniles' mutual biting and increase their survival rate.
Third, timely prevention and treatment of diseases and nursery Before stocking, the breeding ponds should be thoroughly disinfected. It can be soaked with 10ppm bleach, or 150ppm quicklime, and put into new water for use after 7 days. The carcasses were disinfected before hatching. They were soaked with 8ppm potassium permanganate for 20 minutes (water temperature 20Â°C) or soaked with 20ppm furazolidone for 25 minutes. Can also be used 3% of salt soak for 10 minutes to kill the bacteria in the breeding process, you can use 15ppm quicklime or 1ppm bleach alternately spilled, usually 15 days spill once. In order to prevent diseases, sulfa drugs may be mixed in feed or alternately with antibiotics. Add 2% to the juvenile feed supplemented with a little V?E, V?C-enhanced juvenile antibody. The betaine can be used as a food supplement for the baby. Injured infants should be soaked in 2ppm malachite green solution or painted with gentian violet to prevent infection. Illness should be promptly isolated and treated. To completely change the water pool, 10ppm formalin spill, and targeted drug treatment.
Four, hibernation management overwintering is a difficult time in the juvenile cultivation. Due to the small number of hatchlings (usually only 10 to 15 shells), the nutrients stored in the body are small, the wintering period is long, and the consumption is large. When the natural water temperature is 20Â°C, greenhouses must be promptly transferred to the greenhouse for warming culture. In the absence of a greenhouse, when the water temperature is below 15Â°C, the fishermen will be transferred to the wintering pond in time. Overwintering pond should choose sunny, leeward, antifreeze insulation indoor or plastic shed, the bottom of the pool pad 20 cm of fine sand, and then into 10 cm of water, the quail quail with 20ppm furazolidone soak for 25 minutes per square meter put into the 200 There are ~250 animals and they will drill into the sand themselves. If the number of young children is not large, they can be put into the tank, barrel, or pot and filled with fine sand to store water for winter. During the winter to maintain the appropriate temperature (usually winter requirements of water temperature at 2 Â°C ~ 6 Â°C), to prevent indoor temperature when high, so as not to wake up from hibernation, not conducive to hibernation. The pool water does not generally need to be changed. If the water level drops, a little water can be added, but the water temperature must be the same as the water temperature in the wintering pool. When weather changes, antifreeze measures must be taken in time. Through many aspects of scientific feeding and management, after the hibernation has been hibernated, the general survival rate is about 95%.
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