Mackerel Fish,Mackerel Frozen,Frozen Indian Mackerel,Frozen Pacific Mackerel Zhoushan City Shuangying Aquatic Products Co., Ltd.  , https://www.shuangying-aquatic.com
Biomass magical use
The integration of bio-fertilizers in fish farming within rice fields offers a sustainable approach to enhancing resource efficiency, land productivity, and ultimately, farmers' income. This method aligns well with the principles of ecological agriculture, but it also requires addressing several key challenges that arise from the coexistence of rice cultivation and aquaculture.
One major challenge is the conflict between shallow irrigation practices and fish farming. To resolve this, fish can be raised in designated areas such as fish ponds, fish pits, and shallow irrigation channels. These structures help create a balanced environment where fish can thrive. For example, fish ditches should be about 50 cm deep and wide, arranged in a crisscross pattern across the field to form a "well" system. Fish pits, each measuring 2 square meters and 1 meter deep, are placed at intervals of 1 to 2 per acre. It's essential that these ditches and pits are interconnected to allow proper water flow and fish movement. During shallow irrigation, especially when the field is drying, the water level should be gradually reduced so that fish have time to move into the ditches and pits. If fish are seen floating at the surface during hot weather, new water should be added immediately to the ditches and pits. After sun-drying, rehydration must be done promptly to maintain a healthy aquatic environment.
Another challenge arises from the use of topdressing fertilizers in rice fields where fish are present. To minimize the impact on fish, organic fertilizers combined with appropriate fungicides are recommended as base fertilizers. This reduces the need for frequent topdressing. If additional nutrients are required, the quantity must be strictly controlled. For instance, farm manure should not exceed 150 kg per acre, ammonium phosphate should be limited to 10 kg per acre, and superphosphate should not go beyond 6 kg per acre. When applying topdressing, the water depth in the rice field should be maintained at more than 15 cm. Importantly, ammonium hydrogen phosphate is strictly prohibited in fish farming systems. All farmyard manure must be fully decomposed, ideally through fermentation using a professional compost starter to ensure safety and effectiveness.
A third issue involves the management of pests and diseases in rice fields that also host fish. While co-cultivation often leads to a significant reduction in pest problems, some cases may still require pesticide application. In such situations, only low-toxicity pesticides—such as "Insecticide," "Entrepreneurial Blight," and "Potato Beggar"—should be used. The water depth in the rice field should be increased to over 20 cm before spraying. Pesticides should be applied in the early morning, when dew is still present, and the spray should be directed at a 45-degree angle to the rice plants. After application, fresh water must be introduced immediately. When changing the water, irrigation should be carefully managed along the edges of the field to prevent fish from being exposed to dry conditions, which could lead to their death. By following these practices, farmers can effectively manage the coexistence of rice and fish while maintaining both crop health and aquatic life.