Generally, it can be caught in August 8- 10/0, and the 100 square meter can reach 38-60 kg. The length of each tail is about 15cm, and the weight is 10- 15g, which meets the commodity specifications.

Cement pool should be paved with soil 15-20cm deep. Before releasing seedlings, base fertilizer should be applied, mainly organic fertilizer, and a large number of zooplankton should be cultivated as bait for trowels.

After releasing seedlings, feed and organic fertilizer should be gradually strengthened. Feed types mainly include rice bran, bean cake, bran, bean dregs, silkworm pupa powder, earthworm, food processing waste and so on. Fertilizers include human livestock manure, crop straw compost and so on.

Extended data:

Selection method of loach fry;

1, look at the body color. High-quality loach seedlings, the body color is basically the same, there is no obvious difference; On the contrary, inferior loach seedlings has different body colors.

2. Look at the head. There is no obvious difference in the individual size of high-quality loach seedlings, and the body shape is symmetrical and coordinated; On the contrary, individuals of inferior loach seedlings vary greatly, and some even exceed 1 times.

3. Look at vitality. High-quality loach seedlings is disease-free and injury-free, with good vitality; On the contrary, poor quality seedlings may get sick when they leave Tang Qian, such as bleeding spots on the body surface of loach. When the temperature is higher than 30℃ or lower than 10℃, the feed rate should be reduced.