Before the stocks are sterilized in the clear ponds, the pool water shall be drained first to remove some silt and keep the silt thickness at the bottom of the pond to be about 20 cm thick. In general, 100 kg of clear lime is used for clearing ponds per mu.
In the first stage of seed stock raising, the large-scale fish species were intensively bred. In the early September, Wujing seedlings with an average tail weight of 43 g were intensively cultivated to grow into 150 g/tail large-size fingerlings in 8 months, and the stocking density was 7500. Tail around / acres. The second stage of cultivation starts from the beginning of May in the second year, and puts 450 to 500 large-sized fingerlings on the acre. The seedlings are soaked with 3% to 4% saline for 10 to 20 minutes before stocking.
The main sources of feed for feeds are live feeds (small tilapia, xiaojiang fish, wheat ear fish, loach, shrimp, etc.) and artificial compound feed. Intensive cultured blackbirds should acclimate their artificial diets in advance. The method of domestication is to mix 80% ground minced fish with 20% flour or other binders into pellet feeds with crude protein content above 40%. At the beginning of domestication, the feed can be mixed with the leeches, and the amount of live leeches and other baits can be gradually reduced until the pellets are all fed to pellet feed.
Water quality adjustment Usually, fresh water is added to the pond every 10 to 20 days, each time adding 20 to 30 cm of water. In the summer and autumn seasons, the water is changed every 5 to 7 days. The microfluidic water is more suitable for the growth of the black plant.
Fish disease prevention and control of hydromycosis, per cubic meter of water with 0.1 grams of bleach and 0.5 grams of methyl blue water soluble Quanchiposa; small melon worm, per cubic meter of water with 0.1 to 0.2 grams of mercurous nitrate Quanchiposa; sticky In the case of sporangiasis, 0.25-0.5 g of crystal trichlorfon is sprayed on every cubic meter of water. Ordinary regular every cubic meter of water body with 20 ~ 30 grams of bleaching powder dissolved in water Quanchiposa, disease prevention effect is good.
Timely catch of Wuyi can reach above 500 g/tail and it can be harvested and listed. The current price is 15 to 20 yuan/kg. Using the “two-stage method†pond to intensively culture mullet, the net income per mu reaches 0.9 to 12,000 yuan.
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