Key points of summer release in California perch pond

1. The pond is disinfected by the sun pond. The culture pond must dry the pond for 10 to 15 days, renovate the ridge of the pond and disinfect it with quicklime and bleach.

two。 Cultivate fish species. First, it is cultivated in a special pond from the end of April to early May in Guangdong, and when it is about 5 cm, it is divided into ponds; second, it is necessary to use local perch for self-breeding, and it is necessary to choose species with strong physique, neat specifications, and healthy and disease-free fish. The stocking quantity is 800 to 1200 per mu.

3. Aquaculture management. (1) feed. In the early 7 weeks, it is necessary to do a good job of centralized temporary breeding and domestication management in a small area, feeding 4 times a day, and feeding twice a day after entering the big pond. (2) Water quality management. In the early stage, the water quality should be treated with inorganic fertilizer compound fertilizer or biological quick-acting Peshuibao, so that the transparency can be kept at 2530 cm, and the water quality should be "fat, alive, tender and cool". After adding water in the middle stage, microbial preparations were used for 10 to 15 days in sunny days to reduce ammonia nitrogen, nitroso nitrogen and other harmful substances in the pond for many times. (3) Disease control: fish fingerling should be bathed with medicine before stocking, antiparasite drugs should be sprinkled once a month after fish stocking, and regular medication should be taken within 5-6 days. (4) Anti-floating floodpond: after entering the high temperature season, it is necessary to turn on the aerator at noon for 2 hours, and pay attention to weather changes, adjust the amount of feed in time, and do a good job of pond patrol.

In addition, the culture model should be optimized by:

1. California perch mixed with silver carp, bighead carp and crucian carp:

Based on the stocking of California perch, 20 silver carp, 40 silver carp and 150 crucian carp are raised in captivity, which can adjust the water quality, remove the residual bait, increase the yield per mu by 75 kg and increase the efficiency by 300 yuan per mu.

two。 Mixed culture of California perch and river crab:

From February to March, we will first release 350 river crabs per mu, with a specification of 100,180 per kilogram, make good escape prevention facilities, plant aquatic plants, release snails, and release California perch after May. After normal feeding, the river crab is no longer fed with other bait, and the river crab is used to remove the leftover bait.

3. Mixed culture of California perch and Australian lobster:

Australian lobsters are released in May, with a size of about 2 centimeters and 500 million per mu, to make escape prevention facilities, to put shelter, to plant a small number of aquatic plants, to be fed normally after California bass is released, and not to add Australian lobster bait.