Green shrimp, also known as river shrimp, is widely distributed in our country. Pond culture of freshwater shrimp has gained rapid development in recent years because of its low investment, simple technology, and good efficiency. There are two basic models for breeding the main cultivated green shrimp and fish-based fish and shrimp polyculture. This article mainly introduces the latter. Fish and shrimp polyculture is generally under the premise of not affecting the fish yield, polyculture appropriate amount of shrimp species, make full use of the residual bait in the fish pond, to increase the yield of the shrimp, and improve the economic benefits of fish ponds. Smoking Set,E-Cigarette Disposable,Magic Puff Disposable E Cigarette,Healcier Factory Direct Dongguan Vanilla Bioengineering Co., Ltd. , http://www.healthecigarette.de
1. Pond conditions All ponds that can raise fish can be cultured with shrimp. The general area is 5 to 10 mu, and the water depth is 1.5 to 2.0 meters. The silt layer at the bottom of the pool should not exceed 20 cm, and the pond should be 4 to 5 meters wide. Shallow beach foot, or set a net in the pool to provide habitat for the green shrimp. Adequate water sources, good water quality, relatively independent injection and drainage, high-yield ponds are equipped with one aerator or one pump per 3 to 5 mu of water.
2. After the pond is ready to dry, the pond is renovated. Before the stocking, 20 kg per acre was used to kill wild fish under a water depth of 30 cm per acre for 20 days; the pool water was drained for about 10 days before stocking, and 75 kg of quick lime was used for acre per acre; grass waste pond was used 0.5 acre per acre. ~ 0.7 kg of herbicide spray; moss and Lake Lake more than 0.5 kg of copper sulfate can be used per acre, dissolved water spill treatment. Once in the pond where the shrimp is raised for the first time, and after most of the shrimp is caught in May and June, the use of sodium pentachlorophenol (1.5 kg/mu) to kill the wild fish/sodium pentachlorophenol does not kill the shrimp, Then reared summer fish species.
3. After applying the base fertilizer to cultivate the feed bio-clearing pond, water is injected into the pool 50 to 70 cm. The water injection must be filtered through 40 to 60 mesh sieve to prevent the wild fish from entering the pool. Apply 200-300 kg of organic fertilizer per acre to cultivate food organisms.
4. Planting aquatic weeds Plant a row of 1-meter-wide weeds in shallow water around the pond to allow the shrimp to inhabit, conceal and provide natural food. The young leaves and sprouts of aquatic plants can feed on the shrimp, which breeds a large number of benthic animals. It is also a natural food for shrimp.
5. Seed stocks are stocked before the beginning of February, and 5 to 8 kg of stocks are stocked in autumn, or 1 to 2 in stocks of 1 to 2 cm in tail stocking season (June to July). Adult fish stocks are stocked in a conventional manner; fish stocks are stocked with summer flowers in June and July. As an example, if the grass carp and the head lice are mainly used, the following species of summer fish should be used: 5000 squid, 2000 grass carp, and 1000 scorpion fish.
6. Feeding and feeding The residual bait for feeding fish by the green prawn is generally no longer fed with the feed of the prawn, except for normal feeding of fish feed. However, feeds such as barley, wheat bran and chopped wild fish can also be fed.
7. Water Quality Shrimp ponds require high water quality, with dissolved oxygen not less than 4 mg/l. It is necessary to ensure that the water and fertilizer in the pool are kept tender and fresh through such measures as fertilization, feeding, and water injection. In the early stage, fertilization was mainly used to cultivate food organisms; mid-term water injection was performed periodically to flush freshwater; ground water was changed frequently to prevent water quality from aging and promote the growth of clams.
8. Prevention of disease in the high temperature season to prevent hypoxic floating head work; regular use of quicklime, adjust the pH of the pool water between 7.5 to 8.5, generally from September every 15 to 15 days with 15 to 20 kg of calcined water The pool spilled once.
9. Harvesting of double-season shrimp ponds Spring shrimps are generally harvested in stages in May and June and will be produced at the end of June. Autumn shrimp began to be harvested in stages from October, catching large and small fish, and from January to January of the following year, dry ponds were produced. One species of shrimp rearing pond was set for the first time, and spring was also caught in May and June. However, in the dry pond, the autumn shrimp began to catch large and small in September and was caught in the dry pool in December and January. With a body length of 4 cm, the following shrimps are bred in August of that year and can be reserved for the seeds of shrimp farming in the following spring.
Author: Pond Jiangsu Agricultural Reclamation Group Corporation Agricultural Division