2. Adopt polyculture. There are two kinds of polyculture in Danyang River, which is generally adopted, because at this stage, the habits of bighead carp are gradually different, and the requirements for the external environment are also different. According to the habits and adaptability of various fish to water quality, polyculture not only provides a suitable growth environment, but also gives full play to the water utilization rate and food economy.
3. Feeding management. Bighead carp still mainly feeds on plankton, and the water in the pond needs fertility and more plankton. In addition to applying base fertilizer before stocking, green manure and cooked manure should be applied after stocking flowers in summer, and fresh water should be injected regularly to keep the water brown and green. Pay attention to the "four-fixed" principle when feeding artificially, that is, timing, positioning, qualitative and quantitative, which is convenient to improve the utilization rate of bait and reduce the feed coefficient. At this time, the number of bait is less.