First, carp species stocking: Tilapia up until August-October, most of them have reached the market specifications (about 400 grams per genus) and can be harvested and marketed. To dry ponds in late October, stocks of carp were stocked for 10 days after clearing the pond with lime. The specifications were 300-400 grams per tail and 300 fish stocks per 0.067 hectare. Fish seedlings were disinfected with malachite green and salt mixture.
Second, feeding bait: In early November, when the carp is put into the pond at the same time when the bait fish, the scale of each tail 25-50 grams of cheap fish, oysters and other fish, began to put 150 kg per 0.067 hectares of water, gradually increased after feeding the amount. The feeding amount is: feeding every 7-10 days before the end of February; 2 feedings every week from March, feeding 15-20 kg per 0.067 hectare of water; according to the weather conditions in April Increase the amount of feeding. To ensure that the ratio of fish and bait fish tail is 1:5-10. The density of bait fish is too thin. On one hand, squid is not fully fed, and on the other hand, it will consume too much physical strength due to predatory bait fishes, thus affecting growth. The density of feed fish is too high and it is easy to cause anoxic floating heads. In order to ensure the year-on-year growth of uneaten bait fish, appropriate amount of cakes should also be fed.
Third, fertilization and water quality control: aquaculture products, the water body requires rich oxygen, fresh water. Add new water 1 to 15-20 days in winter, each time 10-15cm deep, 7-10 days in spring, fill with new water once, each time 20-30cm deep, to ensure that dissolved oxygen in water is kept at 4mg per liter. Above, the transparency remains above 40 cm.
Fourth, disease, predator control: carp strong disease resistance, basically no disease occurs in the breeding process. Before the squid enters the pond, it is disinfected with a medicinal bath to avoid sickness entering the pool. Feeding bait fish should also be maintained during the feeding process to ensure sufficient feed.
Tilapia is not tolerant of low temperatures. In the late autumn and early winter, when the water temperature drops to 15°C, it cannot continue to grow. In fact, tilapia culture ponds can only be used for half a year (5-10 months). Salmon is different, but it does not stop eating during the winter and it can continue to grow. However, the growth rate is decelerating. The use of tilapia breeding ponds to raise octopus during the idle period, this stage of seedlings are cheap, feed fish Feng Gong, squid raised to the following year, the price is relatively high. Through years of production practices, Yifeng Town, Yandu County has explored a practical technology that utilizes tilapia ponds to raise squid, effectively increasing the pond’s productivity, with a benefit ratio of 0.067 hectares (mu) per unit of tilapia or a single cultured tilapia. Increased fish by more than 3%. Its specific technology is as follows: