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First, choose a good pond pond requires an area of ​​8 to 10 acres, adequate water, good water quality, water depth of more than 2 meters, the slope ratio of 1:2.5. A 4 to 6 meter wide shrimp ditch is opened in the center of the pond for catching. According to the scale of farming, the high-incidence and low-row technology is used to build the drainage system.
2. Breeding of seedlings 1 Breeding of two frogs of Macrobrachium rosenbergii: In the late March to the beginning of April, freshly-produced Macrobrachium praecox seedlings were purchased and reinforced in a plastic greenhouse. The shrimp species size in mid-to-late June will reach 3 centimeters; May In the middle and late period, it will purchase special larvae of Roche Macrobrachium sinensis, and the specifications of shrimps will reach 3 cm before and after mid-August for stocking in the rear bream. 2 Feeding of Macrobrachium rosenbergii followed by raising of young shrimp: stocking of Macrobrachium roxburghii in mid-to-late May; stocking cages in cages in the nursery in early June, specializing in larval rearing shrimps, and cultivating young shrimps at the end of September. The specifications reach about 3 cm.
Third, a reasonable stocking 1 breeding two giant Roche shrimp: the former turtle stocking 0.8 to 10,000 per acre species, rearing stocking 1 to 25,000 per mu. 2 Macrobrachium rosenbergii is reared and reared with young shrimp: Macrobrachium rosenbergii rears 2 to 25,000 tails per acre. Prior to stocking, shrimp pond clearing ponds were sterilized, basic bait was cultivated, and transplanted plants were used. Select sunny morning stocking, pay attention to the temperature difference should not be too large.
Fourth, bait feed feeding special compound feed. Farm Macrobrachium rosenbergii to feed a series of feed-based, appropriate increase in small fish and shrimp. Feeding feeds is mainly once in the evening, accounting for about 70% of the total feeding amount. During the daytime, the feed was put in the deep-water area and put into shallow water grass at night. The timing, fixed-point, fixed-quality and quantitative feeding were used. Daily feeding of Macrobrachium rosenbergii was between 5% and 10% of the shrimp body weight, and 3.5% of the shrimp.
V. Water Quality Management From May to June, shrimps or shrimp species will be stocked in the initial period and maintain a water depth of 0.8 meters. In the high-temperature season of July-September, the pool water will be filled. In the autumn, it is hot and humid, and according to the water quality, the new water should be changed every 7-10 days, changing the water by 1/3 each time. Usually strengthen the water quality inspection and patrol ponds.
6. Gradually catch two giant Roche shrimps. The former shrimps will be caught in August and the latter will be caught in early October. One batch of Macrobrachium rosenbergii, one batch of freshwater prawn, and Macrobrachium rosenbergii have started to catch large inflows since mid-August, and were listed in batches in batches. Green prawn was caught on the market in May of the following year. Conditions can take the method of holding a plastic greenhouse, choose to leave some of the shrimp products of Macrobrachium praecox sold at high prices around the Spring Festival.
Author: Yifeng Town Fisheries Station, Yandu District, Yancheng City, Jiangsu Province
Two-season breeding of Macrobrachium rosenbergii in one pond
The use of plastic greenhouses to cultivate early and post-shrimp seedlings, from May to mid-August, breeding of the former Macrobrachium rosenbergii, from mid-August to mid-October to breed the second giant Rhodiola rosenbergii; or from June to September, culture of Macrobrachium Roche, October To the second year of May, cultured shrimp. In this way, the breeding of two shrimps a year can make full use of aquaculture water resources and feed resources to improve the efficiency of shrimp farming.