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Rice field raising green shrimp technology and methods
The practice of cultivating fresh shrimp in rice paddies offers multiple benefits, including environmental improvement, increased agricultural output, and higher income for farmers. This integrated farming method is gaining popularity due to its sustainability and profitability. To ensure success, several key technical steps must be followed:
First, selecting the right field is crucial. The site should be near a water source, have good drainage, and feature fertile soil. After plowing and leveling the land, a shrimp trench should be dug—typically 2 meters wide and 1 meter deep—either at the end or middle of the field. Additional smaller ditches, about 1 meter wide and 0.8 meters deep, should also be created to support the shrimp population. These trenches are connected to the drainage system, filled with clean water, and protected from wild fish intrusion.
Next, timing and stocking play a vital role in ensuring high survival rates. Shrimp larvae are usually introduced one week after rice planting, using young shrimp that are raised in hatcheries. The recommended stocking density is between 2,000 to 5,000 per kilogram, with approximately 10,000 to 1.5 million per acre. It's best to stock during the early morning on rainy or sunny days, distributing the shrimp evenly across the water area to avoid overcrowding and oxygen depletion. Quick and careful handling during this process helps improve survival rates.
Feeding is another critical aspect. Shrimp should be fed immediately after stocking, using a combination of bran, soybean cake, or commercial feed pellets. Supplementing with snails, shellfish, and small fish can provide additional nutrients. Feeding twice daily, especially in the evening, with an amount equal to 2-4% of the shrimp’s body weight ensures optimal growth. Adjustments should be made based on weather, season, and shrimp behavior to maintain healthy feeding habits.
Proper management is essential for long-term success. Regular water changes are necessary to keep the water in the shrimp ditches clean, particularly during hot summer months. Even when rice is growing, the water level in the ditches must remain stable to create a suitable environment for the shrimp. Pesticide use should be minimized, and if necessary, only low-toxicity, high-efficiency options should be used, applied carefully to avoid harming the shrimp. Additionally, predators such as frogs, snakes, and water rats must be controlled to prevent them from preying on the shrimp.
By following these practices and adapting them to local conditions, farmers can achieve excellent results. With proper care and management, a paddy field can produce 20 to 30 kilograms of shrimp per acre, making it a highly rewarding and sustainable farming method.
1. Garlic fragrance everywhere, unique charm.
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