Rice-fish farming is a good form of developing ecological agriculture. However, the following three contradictions must be resolved in rice-fish farming: 1. Contradictions between sun-dried fields and fish farming. Digging fish ditch and fish pits in paddy fields when they are in the field Allowing fish to inhabit it is a better way to resolve this contradiction. The depth and breadth of the fish ditch are each 50 centimeters. Fish pit area of ​​2 square meters, 1 meter deep, dug 1 ~ 2 per acre. Fish ditch and fish pit should be connected. When the sun is drying, it is necessary to slow the release of water so that the fish have enough time to swim into the fish ditch and fish pit. During the sun drying, the algae should pay attention to observe the fish, find the fish floating head, and immediately add new water to the fish ditch and fish pit. 2. The contradiction between topdressing and fish farming The use of organic fertilizer as the main component and the application of base fertilizer is a good way to reduce the amount of topdressing fertilizer and to resolve the contradiction between top dressing and fish farming. If the paddy field is small and grows weak and needs top dressing, it must be controlled. Generally, farmyard manure can't exceed 150kg per acre, and topdressing ammonium sulfate does not exceed 10kg per acre. Topdressing superphosphate does not exceed 6kg per acre. The depth of paddy fields should be kept at 15 cm or more in topdressing, and the interval between top dressings should be 15 days or more. Note that the use of ammonium bicarbonate is strictly forbidden in fish farming rice fields, and farmyard manure must be fully decomposed. 3. Prevention of Contradictions between Rice Diseases and Insect Pests and Fish Culture Paddy field fish farming can significantly reduce the pests and diseases of rice, and generally do not require medication control. If you really need medication, be sure to use pesticides that are less harmful to fish, control the amount of medication, and use the correct method of application. Insecticides such as insecticidal cockroaches, enemies of the enemy, and nets of rice plants can be used. During the application, the paddy field water was added to a depth of more than 20 cm, and the rice seedlings were sprayed at a 45 degree angle when the dew was not yet dry in the morning. Immediately after spraying, change the new water. When changing the water, flush the water sideways to prevent dead fish on the dry beach.
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