In order to get better results from raising radix scutellariae, it is necessary to breed yellow oysters on their own. The jaundice breeding technique is more difficult, and the author has summarized six ways to increase the spawning amount of jaundice:
1. Choose the venues. Plant plants such as water lettuce, water peanuts, etc. in the pool of yellow peony, and put some stones and bricks in the bottom of the pool to simulate the natural ecological forms to facilitate spawning by the nymphs.
2. Adjust the water quality level. Aquilinium aquaculture pond water, must be non-toxic river water, lake water or groundwater, PH value of water pH should be 6.2 to 7.8, water depth 20 to 30 cm, the new pool also carry out dealkalization, often with 1 ~ 2ppm bleach Disinfection, the amount of each should be less, so as not to stimulate the pro-astragalus.
3. The stocking density should be appropriate. Individuals of the parents should be moderate, it is best to choose 100 to 150 grams of Astragalus for spawning and pro-spawning. At this time, the proportion of male and female Astragalus is 1:3 to 4. The stocking density is about 10 for Astragalus membranaceus per square meter, affecting too much. The amount of eggs.
4. It is reasonable to feed feed. In the breeding season of A. japonicus in April-September, feeds with higher protein content, such as fish paste and wolfberry, are to be fed, and at the same time with a full-price compound feed of the indigestible family, sexually mature A. japonicus is generally fed 5 to 7 after high protein feed. The eggs will be laid in the sky and the eggs will be produced on the side of plants or stones. As long as there is white foam, it is the production of the ovary from the nymphs.
5. Grasp the water temperature. Each morning in the spawning season of Astragalus, a pool of patrols should be patrolled by the pro-Huang Lake. If a white foamy ovary is found, it should be gently moved into the hatchery and incubated with microfluidic water. The fertilized eggs swell up to about 4 mm after absorbing water. The incubation time varies from 4 to 7 days depending on the temperature of the water. When the water temperature is 25°C, it is completed in 6 days. After hatching the seedlings, the water temperature 28 °C after 10 days, the body up to 26 mm, the yolk sac has not completely disappeared; after 7 to 10 days the yolk sac will be completely finished, began to eat water plankton, can be appropriate small amount of investment Feed the little otters. After 35 days or so, the larvae grow to 5 to 6 cm in size, and they can be kept in feeding ponds.
6. Regular quantitative feeding. No matter whether it is spawning nymphs or newly hatched seedlings, they must be fed regularly. The spawning nymphs should be fed 2 times a day. They should be fed every time around 8 o'clock in the morning and 6 o'clock in the afternoon. The overall weight of the yellow cockroach is 2% to 3%. The seedlings are fed once a day, and in the afternoon from 2 to 7 o'clock, feeding in this way is beneficial to the production of eggs from the nymphs.
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