Macrobrachium rosenbergii is not tolerant to low temperatures. At the end of fall and winter, when the water temperature drops to 15°C, it needs to be picked up from the dry pool in time so that the Roche Macrobrachium aquaculture pool actually uses only (from May to October) for half a year. The carp does not completely stop in winter and continues to grow, but the intensity of feeding and growth rate slows. The use of Roche Macrobrachium aquaculture ponds to raise fish during the winter, this stage is a cheap seed, rich bait fish, carp raised to the following year April to May listing, the price is relatively high. The implementation of Macrobrachium praecox and carp rotation can maximize the use of the idle period of fish ponds, increase the output rate of ponds and increase the breeding efficiency. 1 pond conditions and preparation 1.1 Pond conditions and clearing requirements The pond has sufficient water sources and is convenient for drainage and irrigation. It has an area of ​​3 to 5 mu, and the foot of the pond is flat. The slope ratio is 1:3 or more, and the effective water depth is 1.2 to 1.5 m. Before the raising of post-seedling shrimp, dry ponds, clearing, exposing, digging trenches with a width of 1m and a depth of 0.5m and communicating with the drainage ditch shall be used as shrimp sewers; New water, water depth 0.6m. 1.2 Planting Concealed Plants Swirled vegetables are grown on pond slopes around the pond. Usually planted at the end of April, in mid-May, the fishery ponds will be transplanted to the pond's 0.7m water level line after pond clearing. The planting distance is 0.1m. When the water level rises, the watercress grows to 2-4m when it grows well, occupying the entire area. One-fifth of the pond area, as a Macrobrachium rosenbergii inhabitation and clam shell environment. 1.3 Set up an intermediate cultivation pond In the leeward sunny position of the pond, excavate a rectangular small pond with an area of ​​50m2. The depth of the pond water is 0.8-1.2m. Take a bamboo frame and cover it with a thin film. The net is hung in the pond for shrimp to inhabit. About 1 week before the stocking of shrimps (around April 15), 1kg of bleaching powder was used to disinfect the wild fish and germs. The water was infiltrated three days before the release of the seedlings (April 22) and heated (heat pump available) for heat preservation. When the water temperature is controlled above 22°C, Macrobrachium rosenbergii can be stocked. 2 seed stocking 2.1 Stocking of Macrobrachium rosenbergii larvae On April 25th, approximately 100,000 fowls (2,000 pigs per square meter) were reared in the middle of the cultivation pond. In the holding process, oxygen is pumped by an electromagnetic air pump. In mid-May, when the weather is clear and the pond water temperature is stable above 20° C., the insulation film is peeled off. After the water temperature in the cultivation pool is the same as the pond water temperature, the net is captured with a dip net. Count into the pond. Under normal circumstances, holding for 25 days or so, the survival rate of shrimp seedlings is 60% to 70%, the specification is 2 to 3cm, and stocking is 3 to 5 mu (1.0 to 20,000 mu per mu), 20 days after the seedlings enter the pond. On June 15th, 50 mu fish larvae were hatched or used to control plankton biomass in order to avoid excessive water quality and affect the feeding and growth of Macrobrachium rosenbergii. 2.2 Fish species rearing Macrobrachium rosenbergii cultivated until September, most of them have reached the market specifications (60 tails/kg), can be listed in batches in advance fishing, until the dry pond in late October, 10 days after the lime clear pond fish stocking Species, specifications for each 0.15 ~ 0.2kg, 300 acres of stocking, accounting for about 50kg; fish ponds with malachite green and salt mixture disinfection. 3 Breeding management 3.1 Feeding 3.1.1 Shrimp Breeding The early and post-shrimp seedlings that have just entered the greenhouse are mainly fed with egg tarts twice a day for 50g each time; 7 days later, they are fed with high protein diets such as surimi and soybean milk, and the amount of feed is 50% of the body weight of shrimps. , Daily morning, noon and evening, once in the evening, the amount of feeding is 60% of the whole day, at the same time depending on the situation of eating and drinking water and increase or decrease. After 25 days of transfer to the pond, the whole granule feed of Macrobrachium rosenbergii began to be fed, supplemented with bean cakes, wheat flour, bran, small fish, and crushed snails, and animal feeds accounted for more than 35%. The amount is 20% to 40% of the body weight of the shrimp; two months later, the body weight of the shrimp is 5% to 10%. Twice a day, 30% of the total amount of rice in the morning and 70% in the afternoon, and appropriate feeding of duckweed, silkworm and other plant foods rich in citronin and other trace elements to meet the physiological growth of Macrobrachium rosenbergii need. 3.1.2 Squid farming In early November, when the carp were fed with bait fish at the same time, the size was 25~50g cheap and the white bream, carp fingerlings and loach were each sold. The mu was set to 150kg and gradually increased to match. Stocking 100 to 0.45 kg of white storks. Feeding is carried out according to stages. Feeding once a week before fine weather before March, 2 feedings every week in March, and feeding 15 to 20 kg per acre, depending on weather conditions in April. To ensure that the ratio of carp and bait fish tail ratio is 1: (5 to 10), bait fish density is too thin, carp consumes too much physical strength due to predator bait fish, and does not reach the purpose of full bait to affect growth; bait fish High density can easily cause anoxic floating heads. In order to ensure the year-on-year growth of uneaten bait fish, appropriate amount of rapeseed cake was also fed. 3.2 Fertilization and Water Quality Management 3.2.1 Shrimp culture Macrobrachium rosenbergii temporarily raises seedlings 5 ​​to 7 days before Xiatang, and 100 kg of fermented organic manure is applied per acre to cultivate plankton and other natural baits; during the growth period, superphosphate is applied once every 20 days. Amount of 3 ~ 5kg per mu, but avoid mixing with lime or use during the same period. Generally, fresh water is added every 8 to 9 days after the pond is under the pond, and the water level is increased by 8 to 10 cm every other week. After two months, the water level reaches about 1.4 meters. In the hot season, some new water will be added every 2 to 3 days. In case of continuous low pressure or rainy days, new water should be replaced in time. Shrimp clams peak during the day, moderately reduced water levels during the day to facilitate the increase in water temperature, promote new shell hardening, fresh water in the evening, favorable shrimp clam shell growth. Every morning and evening, each patrol pond should pay attention to the change of water quality. Once it is found that shrimp swims and climbs to the shore, it should immediately inject new water or use oxygen aerators to increase oxygen, so as to prevent the death of fish and shrimp caused by lack of oxygen. 3.2.2 Aquaculture of aquatic products requires rich dissolved oxygen and fresh water. In winter 15 to 20 days, new water is added once, each time is 10 to 15 cm, and once every 7 to 10 days in spring, each time is 20 to 30 cm. The dissolved oxygen in the water remains above 4 mg/L, and the transparency is kept above 0.4 m. 3.3 Disease, enemy damage prevention 3.3.1 Common diseases of shrimp disease include carapace, black shank and ciliate diseases. After the onset of crustacean, change the pool or change the water in large quantities. Sprinkle with nitrofurazone at a concentration of 1 mg/L. After the onset of black shank disease, use malachite green with a concentration of 3 mg/L and feed with oxytetracycline; ciliate disease. Available copper sulfate and zinc sulfate (1:1) mixture 0.6mg/L Quanchiposa. In prevention and control methods, ecological prevention should be the mainstay. For example, in July-September, shrimps can be transplanted with appropriate amounts of aquatic plants (such as black-leaf algae) regularly when the shrimps are in a fast-growing period. On the one hand, they provide habitats and covert places for Macrobrachium rosenbergii and prevent Macrobrachium rosenbergii from interfering with each other. And on the other hand, it can also improve the ecological environment and maintain the ecological balance of shrimp ponds. 3.3.2 Prevention of carp disease During the carp culture period, there is a mistletoe but it is not harmful. In the first 5 days of the lower pool, the pool water is spilled with 0.5 mg/L B type extermination. The carp is fed into the pond with salt water and malachite, and is prevented by a 0.25 mg/L monthly strong insecticide type I. . Because the carp is sensitive to most of the insecticides, pay attention to the changes of the fish when it is spilled, and feed the bait fish during the feeding process, but it is necessary to drink the fish after the bath. 4 Harvest and Benefits 4.1 Benefits of Macrobrachium rosenbergii Macrobrachium rosenbergii was reared to the late autumn and early winter in accordance with this model. During the entire breeding period, the feed amount per mu was 380kg, the feed coefficient was about 2.4, the survival rate of shrimp was about 75%, the shrimp yield was 160 kg, and the output value was 8,000 yuan. The income of fish species is about 300 yuan; the cost is about 2280 yuan per kilogram of 6 yuan, and the artificial miscellaneous expenditures of electricity and pond rent are 1,000 yuan, and the net profit is 5,000 yuan. 4.2 Carp income Carp is raised to dry ponds at the end of April and early May. During the breeding process, 600kg of bait fish and 200kg of vegetable cake powder are used in the aquaculture process. About 150kg of squid can be produced per mu (80% of commercial carp containing more than 0.4kg). Baiji 70kg, mu total income of 7800 yuan; spending sturgeon species 2300 yuan, eel and other bait fish 2400 yuan, feed, electricity, pond rent and other artificial miscellaneous count of 1,000 yuan, 2000 yuan per mu net profit. 5 Summary The total net profit of 7000 yuan or more per year is more than the conventional aquaculture efficiency. It is a breeding mode worthy of further research. However, the following three issues must be paid attention to in production. 5.1 Macrobrachium rosenbergii farming adopts early-flourishing seedlings to carry out nesting of seed baths, once aquaculture, multiple-fishing, and batch-listing aquaculture models, which can extend the growth period of Macrobrachium rosenbergii by 1 to 2 months, and increase the market size of adult shrimps. Specifications and open sales period to avoid centralized listing and increase the selling price. The planting area of ​​spinach should not be too large, otherwise it will affect the photosynthesis of phytoplankton and lead to the lack of oxygen in the water body. 5.2 The bait fish should be rich in palatability. The supply of bait fish should be at least 4 times the weight of the commercial carp. The yield of carp depended on the quality of the carp species: (1) The specifications are neat, the fish is not injured, the surface is smooth, there are no parasites, etc.; (2) The stocking quantity is controlled, the stocking specifications are increased, and the listing rate is increased. 5.3 Inject new water frequently to keep the water fresh. Sensory Cortex,Occipital Cortex,The Frontal Cortex,Periamygdaloid Cortex Henan Qiancuntang medicial technology co.ltd. , https://www.qctchineseherb.com