Grasping the intensified cultivation of the fish species in the autumn is the key to raising the survival rate of the species.
Before improving the release of environmental fish species, the original pond water should be halved and new water should be added. Fertilizer manure 150 kg per acre pond, once every 9 days, applied a total of 3-5 times. Appropriate topdressing of nitrogen-phosphorus-based fertilizers generally applies 1.5-2.5 kg of urea and 3-5 kg ​​of superphosphate per mu of pond, and is applied once every 7 days. Add new water after each fertilization to keep the water transparency at 20-30 cm. Every half a month, use 10 to 15 kg of quicklime to splash water once per acre.
The fish species are mainly used to cultivate grass-fish ponds, which can be used with about 30% of the species such as cockroaches and cockroaches, and ponds with mainly cockroaches and cod species, together with 30% grass-fish species. The ratio of carp and carp species is 5:1. The stocking density should be determined according to the size of the water surface, water depth, fish species specifications and feed supply conditions. For ponds with a water depth of 1.5 meters, 3000-4000 fish species of about 10 centimeters are stocked per acre. The specifications of stocked fish should be neat.
The feed is fed with grass carp and group head carp species, and attention is paid to fresh green feed supplements. For feeding carp fish species, more animal feed such as snails should be added. The ponds where the main oysters and squid species are cultivated should have moderate amounts of fertilizer and water. In addition to guaranteeing moderate fertilizer and water, bran and carp species pools should also be fed in appropriate quantities such as bran, rice bran, and cakes. Before and after the frost fall, the water temperature should be reduced and feed should be added. The daily feed volume should be 3% in the pond fish species. As long as the water temperature is above 7°C, feed should be maintained and avoid feeding prematurely, but fertilization and green feed should be reduced as appropriate.
Prevention of fish diseases adheres to the inspection of ponds in the morning and in the evening, regularly disinfecting and improving the water body, feeding and feeding to achieve timing, positioning, quality, and quantity, and promptly remove feed residue. Feed the baits twice a month for 5 days. Found fish diseases, timely diagnosis, symptomatic treatment.
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