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The concise technique of raising rice shrimp in rice field
The use of paddy fields for the cultivation of freshwater shrimp has the advantages of low cost, low risk, high profitability, and no damage to the structure of paddy fields. First, rice field selection. Choose green paddy in paddy fields with sufficient water sources, good water retention performance, and neutral or slightly alkaline. If the soil is slightly acidic, 5 to 10 kg of quick lime must be applied to adjust the pH every 10 to 15 days. A ditch with a depth of 40 to 50 centimeters and a width of 80 centimeters was formed around the paddy field. The mud was raised to reinforce the field ridge and form a shrimp pond. It is required that the entire pond can store more than 60 cm of water. Second, shrimp pool disinfection. The shrimp ponds were first filled with water, and then the water was fed in 10 cm. Each loach was splashed with 75 kg of lime. After 7 days, the pool water was drained and exposed for several days. Third, water injection and fertilization. Before 5 to 7 days of feeding shrimp, the water inlet is strictly filtered with 60 to 80 mesh mesh. Fertilize after water injection, fertilize the water quality, make the pool yellow-green, and the transparency is 30-40 cm. Generally 200-300 kg of organic fertilizer is applied per acre. Fourth, shrimp stocking. When the water temperature is around 20°C, it can be harvested from rivers and lakes to raise eggs and shrimp. Select shrimp eggs close to the development level in order to focus on seedlings, shrimp seedlings are neat. It is also possible to collect shrimp seedlings with a specification of 1,600 to 2,000 tails per kilogram in November and stocking 8 to 10 kilograms per acre. Fifth, plant cultivation. In the shrimp pond, suitable amounts of water, peanuts, water hyacinths, or spinach vegetables are grown, accounting for about 25% of the total area. These plants not only provide shelter for shrimp but also provide some of the food for the shrimp. Six, bait feed. When the size of the shrimp reached 1 cm, it began to be fed. In the first 30 days, the crushed powder is fed with full-grain pellet feed and is fed 0.3-0.7 kg per mu per day. After 30 days, the pellets with a particle size of 2 mm were fed and increased by 0.2-0.3 kg every 10 days until the feed amount per mu was 1 to 2.5 kg per day. The amount of feed was eaten as feed, and no food was left. Seven, fishing listed. New Year's Day, during the Spring Festival, shrimps or earth nets are used for fishing and listing. All fished and listed before May.