Watermelon rind can be an excellent and nutritious feed for fingerlings. It is highly palatable, easy to digest, and promotes efficient nutrient absorption. Using watermelon rind as a feed not only expands the available feed sources but also reduces production costs by 15% to 20%. Additionally, it helps minimize environmental pollution by repurposing what would otherwise be agricultural waste.
There are two common methods for feeding watermelon rind to aquatic species: fresh and dried.
When using fresh watermelon rind, it is typically crushed with a mixer or blender and then scattered throughout the pond. This method is effective for raising oysters, clams, grass carp, and squid. It is recommended to apply 80 to 100 kilograms of fresh watermelon rind per acre of water, twice daily, depending on the water quality. Alternatively, for every thousand fish, 60 to 80 kilograms of watermelon rind can be fed directly, allowing the fish to consume the pulp. In addition to being a food source, the rind also helps improve water quality by promoting the growth of natural food organisms. The key to this method is to process the rind so that the pulp is easily consumed by the fish.
For dry feeding, the watermelon rind is first peeled using a planer, then sun-dried and ground into a fine powder. This powder is typically used at a rate of 2 to 3 kilograms per acre per day, divided into three feedings. It works best when combined with other types of feed to ensure a balanced diet for the fish.
By utilizing watermelon rind in aquaculture, farmers can achieve cost savings while maintaining healthy and productive aquatic environments. This practice not only supports sustainable farming but also contributes to a more eco-friendly approach to fish rearing.
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