Technical points for improving the hatching rate of jaundice

(1) Simulating the natural ecological environment, building a breeding pond, selecting a good site, and building breeding and spawning grounds. In plant breeding ponds, plants such as water lettuce and water peanuts should be planted, and some stones and bricks should be placed at the bottom of the pond to simulate the natural ecological environment to facilitate spawning. (b) Sterilization and sterilization, adjusting the water quality of the water level Breeding pond water must be non-toxic river water, lake water or groundwater. The pH of the water is preferably between 6.2 and 7.8, and the water level is 20 to 30 cm deep. Newly built The cement pool should also be treated with alkalinization. Usually 1~210-6 bleaching powder is used to disinfect, and each dosage should be less to avoid irritating the seed pods. (C) choose a strong species of crickets, individual size suitable for breeding species must be selected strong physique, the size of the best individuals choose the best 100 to 150 grams of oysters to do spawning prostitutes, this time the male and female jaundice ratio 1:3 to 4, The stocking density should be appropriate, and the number of parents can be set to about 10 per square meter. The higher density will affect the amount of eggs laid. (D) According to the needs of the breeding season, rational feed feed Astragalus breeding season is from April to September, this time to feed the higher protein feed, such as fish paste, lotus root, and then with the full price of compound feed. Sexually matured jaundice usually lay eggs 5 to 7 days after high protein feed. The eggs are produced on the side of plants or stones, and as long as the white foam is found, it may be the production of ovaries. (E) pay attention to regulate the water temperature, do a good job hatching spawning jaundice spawning season every morning in the spawning pool patrol pool, if the discovery of a white foam production ovaries, we must gently move into the hatching pool, using microfluidic water incubation. Fertilized eggs absorb water and swell to about 4 mm. The incubation time is about 4 to 7 days depending on the temperature of the water. When the water temperature is 25°C, all incubations are completed within 6 days. After the hatching of the seedlings, the temperature of the water at 28°C for 10 days or so reached a body length of 26 mm, and the yolk sac did not completely disappear. After 7 to 10 days after the yolk sac was completely harvested, plankton could be ingested in water, and a small amount of leeches could be fed at this time. After 35 days or so, the larvae can be placed in the rearing pond for 5 to 6 cm. When the seedlings are released, they must be distributed separately depending on the size of the individual. (6) Timely quantitative feeding and promotion of breeding eggs for spawning No matter whether it is spawning or freshly hatched seedlings, it must be fed regularly. Spawning pods are fed twice a day, around 8 am, and each time around 6 pm, each time they are fed at 2% to 3% of their total weight. Seedlings are fed once a day, between 5 and 7 pm.

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