The cake-pulverizing method involves using dry powders made from cakes, such as soybean cakes, peanut cakes, or rapeseed cakes, to feed fish. This technique has become increasingly popular in northern regions in recent years. One of the main benefits of this approach is that it allows for efficient and centralized feed preparation, making it easy to manage and apply. Compared to soybean milk, the dry powder floats longer in the water, which enhances its availability to fish. Additionally, its feed utilization rate is higher than that of soybean milk. The recommended daily dosage per acre of water is between 1.5 to 2 kilograms, divided into four feeding sessions throughout the day.
Another common method is the straw culture technique, which uses aquatic plants like water hyacinths, water peanuts, and water lettuce to create a fibrous pulp for feeding fry. By using a beater to grind these plants into fine straw pulp, the cost can be reduced by up to 15%. Fish fry are typically fed twice a day, with 50 to 75 kilograms of grass pulp spread per acre depending on the size of the water surface. The fry can directly consume some of the pulp particles, while the remaining ones decompose naturally, acting as organic fertilizer that enriches the pond environment. To maximize the efficiency of this method, it's crucial to fully grind the straw and adopt a feeding strategy of small portions, multiple feedings, and even spraying to ensure even distribution.
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