Peng Zeyu is native to Dingjia Lake, Taipo Lake, Wuhu Lake and other natural waters in Pengze County of Jiangxi Province. It is the Jiangxi Fisheries Research Institute and the Jiujiang Fisheries Research Institute from the wild Pengze Suizhong, after more than 7 years of 6 generations. The carefully selected and selected elite varieties. Due to its excellent characteristics such as fast growth, high yield, large individuals, easy transportation, and good breeding efficiency, it has become an important species of freshwater culture and has been widely promoted throughout the country. The main farming techniques are as follows.
Second, the technical points
(I) Selection, clearing and fertilization of ponds
The species of fish ponds is suitable for 3-5 mu, the water depth is 2 meters, and the adult fish pond area is suitable for 10 mu and the water depth is 2-2.5 meters. It requires sufficient water, no pollution, and convenient irrigation and drainage. Each 3.0-mu pond is equipped with a 3.0 kW aerator and each pond is equipped with an automatic feeder. The pond is smooth without leakage and without weeds. In the 10-15 days before the fry and fingerlings in the pond, a pond of 75-125 kilograms of lime or 3-5 kilograms of bleaching powder is used to clear the pond per acre of ponds, and the field is removed by sterilization. 5 to 7 days after the injection of 70-80 cm deep water, water injection with a 60 mesh polyethylene net to prevent the wild fish and their eggs from entering.
The fry and fingerlings were fertilized in the first 7 days under the pond, and 300 kg of organic fertilizer was applied as the basal fertilizer per acre to fertilize the water quality. This provided abundant plankton and organic debris and other palatability foods for the fry to increase the survival rate.
(B) Fish Breeding
1. Stocking Density Density 0.8-1.2 million or summer 7000-9000 tails per mu, pond size 50-100 g/tail. 10 to 15 days after the fry in the pond and 2,000 to 3,000 tails of white peony flowers are used to adjust the water quality (but not with squid, tilapia, etc.), and the survival rate can reach 90% or more. 500-750 kg.
2. Rearing and management of fish under the pond, according to the water quality of the situation of thin fertilizer organic fertilizer or soy milk. According to the growth of the fish, bean cake powder, wheat flour, rice bran, and other bait are fed. After about 20 days of cultivation, the summer flower of about 3 cm can be grown.
The summer flowers are cultivated into large-sized fish species, and they need to be fed with full-price pelleted feed. The protein content is more than 30%, the bait coefficient is 1.4-1.7, the particle size is 0.2-2.0 mm, and the early stage is smaller. bigger. The daily feeding rate was domesticated and fed about 8% of the fish body. After 15 days of training, the clusters can go up and grab food. The amount of feed should be based on the water temperature, weather conditions, water quality, thin fish, fish eating and control.
3. Day-to-day management is mainly to strengthen water quality management and maintain the transparency of the pool water by 25-30 cm so that the pool is water, fat, live, tender and cool. During the cultivation of fingerlings, especially during the high temperature season, new water must be changed frequently to make the waterproof material too fat. 20-25 days before the first injection of new water, each 10-15 cm, 7 days later, changing the water, each time 15-20 centimeters. In the breeding process, when the transparency is greater than 30 cm, timely fertilizer should be applied in a timely manner. The principle is to “lessen the application of diligence†and apply 50 kg of organic fertilizer or 3 kg of urea per acre. Every half-week, the whole pool is splashed with lime to improve the water quality. 15 kilograms of lime are used per acre. Regularly prevent and cure diseases.
(3) Adult fish breeding
1. Restocking each mu of water, put the squid's winter piece 3000-5000 pieces, and mix 200-300 pieces of white scorpion winter piece.
2. Rearing and management of fish species began to acclimate 7 days after pond feeding, bait feed for full price, protein content of more than 28%, particle size of 2.0-4.0 mm, 4 times daily feeding, two times in the afternoon The amount of bait is 3% to 5% of the body weight of the fish, and 80% of the fish is consumed each time.
Adjust the water quality 1-2 times a month and inject some new water, each 10-25 cm, to maintain the body's fatness and dissolved oxygen. After careful feeding and management, it can achieve 750-1000 kg of 0.35-0.5 kg commercial fish per mu, and the benefit is 2000-3000 yuan.
First, technology introduction