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The wintering technical points are as follows:
1, the choice and preparation of the pond. Ponds should be selected to be more regular, sheltered from the sun, water depth is more than 1.5 meters, and ponds with more plants. The overwintering of the shrimps began in December of the following year from December of the first year and lasted for four months. During the winter, the shrimp are generally lurking in the pool of grass and have little activity. In order to provide a good warm wintering environment for the shrimp, it is also necessary to put some aquatic peanuts or willow roots in the wintering pond. Generally, 150-200 kilograms of aquatic plants and 25-35 kilograms of willow roots can be planted per acre pond.
2, reasonable stocking, improve the survival rate. For broodstock winters, pick a healthy physique with full appendages and a standard body size. The female broodstock size is 200-500/kg, the male broodstock size is 140-240/kg, and the male and female ratio can be 2:1. Matching. After the broodstock is selected, 15-25 kg of broodstock can be placed in each pond. When the juveniles are overwintering, they can put 20-40kg of juvenile shrimp with a specification of 2000-3000/kg per mu. Usually wintering begins in mid-December, and the weather is selected for warm weather to raise the survival rate.
3, scientific investment, do a good job management. During the winter, young shrimp still need to eat a small amount of food in order to maintain life and vitality. For this reason, during the whole winter of the shrimp, it is necessary to insist on feeding well, usually in sunny weather, feed 1-2 kg of food bait per acre of water surface, feeding once every 7-10 days, and less bait requirements. And fine, ensure that the parent (baby) shrimp safely winter. We must have someone responsible for this, and insist on regular inspections of the ponds to check the overwintering conditions of the pro- and juvenile shrimps, and do a good job of preventing pollution and preventing predators. During the severe winter season, it is also necessary to prevent the pool water from freezing. Once it is found, it must be broken or drilled in time. The severe parent (young) shrimp dies due to lack of oxygen and suffocates, so that the pro-and-baby shrimp can safely and safely live through winter.
Winter shrimp pond technology
The overwintering of the shrimp ponds is divided into wintering of larvae and wintering of broodstock. The overwintering of juvenile shrimp refers to shrimp breeding in August-September. Until December, shrimps that have not grown to commercial specifications will pass through the winter and will be kept as stocking shrimp in the following year. During the wintering of broodstock, it will be selected. The broodstock that will be used for breeding in the coming year will be intensively cultivated to meet the requirements for spawning and reproduction. Therefore, it is an important basis for aquaculture in the coming year for farmers to do a good job of wintering shrimp.