Comprehensive utilization of idle fish ponds in winter

Breeding adult fish using winter fallow fish pond to raise a season of adult fish, both to increase production, but also to adjust the "summer shortage" of aquatic products market. Due to the short breeding period and low temperature, the following techniques should be adopted: First, early stocking, that is, stocking after the fish species and ponds, in order to make full use of the growth period. The stocking amount is calculated by the maximum water depth of 2 meters, generally stocking 125~150 kg per mu. The stocking ratio is generally about 40% for silver carp, 10% for bighead carp, 30% for grass and bream, and 20% for green and carp. Put@#@233@#@seeds to large specifications, more than 250g of common seam and bighead carp, more than 500g of grass carp, more than 100g of bream, more than 1kg of herring and more than 250g of carp. Second, strengthen management. Fertilization should be done in time after fingerling stocking. Fertilization is mainly organic fertilizer to ensure that the pool water has a certain fertility. In winter, choose sunny and warm weather, feed once every 2~3 days, feed amount is about 20% of usual, increase feed amount with water temperature rise in spring, and maintain good water quality, so that fish maintain a high growth rate, ensure to reach the market specifications as scheduled.

Commercial crabs caught from large water body culture can be temporarily raised in free fish pond to earn seasonal price difference in order to wait for@#@136@#@or stagger the peak of market. Before temporary cultivation, the pond should be cleaned and disinfected with quicklime or bleaching powder, and the anti-escape wall should be constructed with asbestos tile, calcium plastic board and other materials. Generally, 200~300 kg of commercial crabs are temporarily cultivated per mu. It is best to divide them into specifications and male and female temporary cultivation. During the temporary cultivation period, the water quality shall be kept fresh. The water depth shall be controlled at about 1 meter. When the water temperature is above 10℃, the water shall be changed every 2~3 days. In winter, the water depth shall be above 1.5 meters to prevent hypoxia and suffocation death after freezing. When the water temperature is higher, some animal (small fish, shrimp) and plant (pumpkin, potato and other friends) can be fed appropriately to ensure that crab fat body strong listing.

Planting grass winter idle fish breeding pond can also plant ryegrass at the bottom of the pond, which can not only provide bait for adult fish, but also serve as base fertilizer for rebreeding fish species in the original fish pond. First, ditching water filtration, timely sowing. Drain the fish pond. Ditch is dug around the pond, and another ditch is dug every 2 meters to drain the pond water. The silt can be sown in a semi-dry and semi-wet state, with 1.5 kg of seed per mu. Sowing is completed before the end of November, early sowing germinates quickly and the emergence rate is high. Second, strengthen management to prevent waterlogging. 5 - 7 days after sowing. When the temperature rises to 15℃, the grass grows rapidly and some chemical fertilizers should be applied. Before the rainy season of the following year, clean up the drainage ditch in advance and prepare for stain prevention. Third, timely cutting green, water release fish. The first green harvest was carried out in April of the following year to make up for the shortage of green feed for adult fish in spring. After every 20 days or so cut green once. About 20 days before the summer flower fish is bred, the water is flooded, the water quality is improved, and part of duckweed is put into the pond. After the summer flower fish is planted in the pond, there will be sufficient food in the pond.