Fish farming is the key to high yield of spring tubes

Spring fish farming is the beginning of a year's aquaculture activities. Grasping spring feeding and management is of great significance in ensuring the smooth implementation of the annual aquaculture production and improving the overall aquaculture benefits.

Handle the fry species. Three points should be paid attention to the release of fry fingerlings: First, the main breeding species should be determined based on local food and water quality conditions. If water and dry grass are abundant, it is advisable to raise grass and fish. If there are sufficient sources of fertilizer, they can raise grasshoppers, earthworms, and oysters. In regions where there are many snails and clams, they can raise green and eel. The amount of stocking depends on the conditions of the pond and the level of rearing and management. In general, intensive fish ponds are 1,500 to 2,000 fish per 667 square meters, and intensive fish ponds are stocked at 500 to 1000 fish per 667 square meters. To increase the yield per unit area, multiple varieties should be implemented. Multi-species of fish species should be properly bred, and fish should be disinfected before stocking.

Grab broodstock cultivation. Spring is the key stage of gonad development in broodstock. Early brooding is very important. First of all, we must do a good job of water quality management. The brooding pond should be filled with water in a timely manner. After March, the puffer fish pond should be filled once every 10-15 days; the grass and grass ponds should be filled once every 2-3 days. Secondly, it is necessary to grasp the feeding of bait and feed a certain amount of feed such as grain, malt, and bean cake in the early stage so as to promote gonad development in broodstock. In the middle and late stage, grass carp is mainly fed with fresh grass such as ryegrass, while carp and carp are mainly fed with cakes and bran. At the same time, it is necessary to properly apply some human and animal feces, and herrings should be fed with fresh snails and oysters.

Pay attention to fertilizer feeding. When the water temperature reaches 8°C or more after the spring season, ponds with mainly cultured fish, such as squid, should begin to chase fertilizer to cultivate natural food in water. Second, we must grasp the amount of fertilizer, the amount of fertilizer to be determined according to the water quality of fat, generally 667 square meters after the full application of fermented organic fertilizer 80-100 kg. Ponds that feed mainly on omnivorous or edible fish should be fed by feeding as soon as possible, and once a day they should be fed regularly with concentrated feed such as bean cakes and oyster cakes. Before the stocking of fish, the basic fertilizer should be applied, and manure fertilizer should be applied to 250-300 kg per 667 m2; when topdressing, the amount of spring should be large and small in early spring, and in late spring, it should be less than once; keep the water color brown and reddish brown, and the transparency is 30. Centimeters or so.

Do a good job of prevention and treatment of fish diseases. When the water temperature reaches 10°C, the fish begin to feed actively, and the water level should be deepened in time. It is best to change the water once in the early spring. Inject fresh water once every 15-20 days afterwards. At the same time, prevent sewage and enemy creatures from flowing into the pool. With the rise of water temperature, the proliferation of pathogens is accelerated, and the ponds must be disinfected and prevented. 1. The fish should be sterilized with salt water or potassium permanganate when they enter the pool; 2. Every 15-20 days. Chlorine oxide, bleaching powder and quicklime and other drugs alternately use Quanchiposa once; 3, often clear the food bait residue, regularly add new water, to deteriorate the waterproof quality; 4, found that fish disease timely symptomatic treatment.

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