Summer flower varieties are best raised in ponds when the fish grow to more than 2.6 cm. It is too early to divide the pond, the original fish pond water body has not been fully utilized, the scales of fry have not all grown out, the fish body is tender, it is easy to stick to the net when fishing, and the operation is inconvenient, which is easy to cause fry death. However, if the pond is divided too late, it is not conducive to the normal growth of fry, and the fry size varies. Generally, ponds with 800 ~ 65438+10,000 fry per mu (1 mu =667 square meters) need to be cultured for 15 ~ 20 days.

2. Off-pond technology

The time for summer flower fish to leave the pond depends on the sales situation. When leaving Tangqian, it is necessary to draw nets to strengthen the physique of young fish and improve the survival rate during leaving the pond and transportation. The usual practice is: 2 ~ 3 days after leaving Tangqian, stop feeding and fertilizing, pull the net around 10 on a sunny morning, collect the young fish in the net, lift the net coat, make the fish dense in a semi-water state 10 ~ 20 seconds, and then put them back into the original pond; Pull the net for the second time the next day. After intensive cultivation, move the fish into the cage for about 2 hours, and then put it back in the original pond. The cage for intensive juvenile fish culture should be cleaned, and the impurities in the net should be removed to ensure the smooth mesh, and the dissolved oxygen in the water in the box should be sufficient to prevent the head from floating due to lack of oxygen. Summer flower fingerlings can only adapt to pool division and short-distance transportation after such two net-pulling exercises. If long-distance transportation is needed, it is necessary to "hang water". The method is to pull out the young fish that have been dragged up by the net from the original pond on the first afternoon, move them to the cage in the thin pond for the night, and ship them the next morning after about 65,438+00 hours. In all the process of pulling the net, the action should be fast and light, and the net used should be soft and smooth to prevent the fish from being mechanically damaged. After summer flower fingerlings leave the pond, in order to avoid bringing germs into new water bodies and fish bodies, they should be disinfected once. The method is to spray with 0.002% potassium permanganate solution or with 3% salt water. Short-distance transportation should use containers such as wooden barrels and fish tanks, and the inner wall is lined with a layer of soft plastic to prevent scratching the fish; Oxygen bags are more suitable for long-distance transportation. Shipping density: 600 ~ 1000 tails should be shipped in a wooden barrel with a capacity of 50kg of water; 1.7m×0.4m oxygen bag, which can transport 1500 ~ 1800 tails; 1 0.5m3 canvas bag, which can hold 20,000 tails. During shipment, water needs to be changed every 2 hours.