To choose Laokou pond, the water quality is required to be fresh, pollution-free, sheltered from wind and sunny, and have convenient water supply and drainage. The single pond surface is 0.2 hectares to 0.3 hectares (1 hectare is 15 acres), and the pond surface for interculture is 0.3 hectares to 0.6 hectares. The pond depth is more than 2 meters, the bottom mud is 0.2 meters thick, and there is an appropriate amount of aquatic plants around the pond.

Prepare a seedling stocking pond. Pull the net into the fertilizer pond where domestic fish are raised, turn over the surface of the sediment appropriately, and then pour the pond water into the stocking pond that has been desilted and eliminated. Because the temperature is low when whitebait starts feeding, the pond water quality is difficult to cultivate, especially the density of rotifers is low. Use fertilizer water from domestic fish ponds, and input rotifer dormant eggs to quickly increase the bait density in the stocking pond. This work should be completed two weeks before stocking, and the water depth of the pond before stocking is 0.6 meters.

The effect of stocking eggs during the embryonic stage is better than that of fry. They should be put into the pond for hatching 1 week before emergence. 20,000 fertilized eggs are placed per 667 square meters (1 mu), and 30 kilograms of large whitebait can be caught from September to October. If the stocking amount is too large, there will be insufficient feed for the young seedlings. The appropriate depth of the pool water is 1 meter to 1.5 meters.

Supply sufficient bait. In the adult stage (more than 40 mm in total length), the food intake is large and the growth rate is significantly accelerated. Fertilization must be carried out frequently to maintain the density of plankton. When fertilizing, decomposed fermented fertilizer should be applied. You can also sprinkle a small amount of soy milk. Use 250 mg per 667 square meters of water surface every day. -500 grams of soybeans, depending on the water quality.

Pay attention to dietary changes. There is a transformation period in the food habits of whitebait, from eating cladocerans and copepods to gradually transforming into carnivorous food. When it is found that there are fish and shrimps in the intestines of whitebait with a body length of nearly 80 mm, it means that the food habits are changing. Small fish and shrimps should be introduced in time and maintained at a certain density to promote the growth of large whitebait. In the Yangtze River Basin, suitable egg-bearing green shrimps can be introduced in May, and the hatched shrimps can be eaten during the feeding period of the whitebait.

Extended information:

The value of whitebait:

1. The protein content of whitebait is 72.1, the amino acid content is also quite rich, and the nutritional value is extremely high. It has the effects of nourishing the kidneys and increasing yang, dispelling deficiency and activating blood circulation, nourishing the spleen and moistening the lungs, etc. It is a superior nourishing tonic.

2. Whitebait is used as a whole food (that is, the internal organs, head, and wings are not removed, and is eaten as a whole). Its health-preserving and longevity functions have been confirmed by the international nutrition community.

3. Whitebait is a fish that is extremely rich in calcium, high in protein, and low in fat. It has almost no large fish bones and is suitable for children to eat.

4. According to modern nutritional analysis, whitebait is rich in nutrients and has the characteristics of high protein and low fat.

5. Whitebait does not have its fins or bones removed. It is a "holistic food" with complete nutrition, which is beneficial to the body's immune function and longevity.

Baidu Encyclopedia—Silverbait