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After germination and feeding, the grain buds offer several advantages, including a wide range of raw materials, simple production methods, high nutritional value, strong palatability, ease of use, and low cost. Additionally, they help alleviate the shortage of fine and green bait, making them an excellent fish feed worth promoting. Rich in vitamins and carotene, these buds can enhance nutrient metabolism in fish and improve skin immunity, especially for grass carp, silver carp, and other species during their pre-breeding stages. This significantly boosts spawning rates, fertilization rates, and survival rates. Below are the detailed methods for producing and feeding grain buds.
First, the production process. Start by selecting grains like barley or rice, then remove impurities, wash them thoroughly, and dry them. Soak the seeds in warm water (25–30°C) for 24 hours. Once they swell, spread them on a wooden tray or similar container, with a layer of 3–5 cm. Cover them with gauze or sacks and keep them at room temperature (18–25°C). Every day, spray warm water (around 30°C) 3–4 times, and gently turn the seeds. After 2–3 days, roots and sprouts will begin to grow. Remove the cover, and after 5–7 days, the shoots will be ready for feeding. The length of the sprout can be adjusted based on the fish's needs.
Second, feeding methods. Grass carp, common carp, and other fish species readily consume grain buds. Studies show that bluefish, greenfish, and whitefish also eat them. Feeding can start from late April to early November. Using grain buds not only solves the problem of limited natural feed but also helps increase fish weight and reduce costs. When feeding, it’s important to maintain a fixed schedule, quantity, and location. Typically, feed about 5% of the total fish weight daily. If you can’t estimate the fish weight, check after 4 hours. If no buds remain, increase the amount slightly. A small amount left indicates the right quantity. Different bud lengths contain varying levels of vitamins. For example, buds 0.5–1 cm long are rich in vitamin E, ideal for broodstock preparation—helping improve semen quality in males and egg development in females. Buds 2–3 cm long have high vitamin B content, which enhances appetite and digestion, suitable for adult fish. When buds are 3–10 cm long, they are rich in vitamin A, supporting growth and disease resistance, making them perfect for raising broodstock and fry. Generally, use 3–4 kg of buds per 1 kg of fish. They can be fed directly or mixed with other feeds to boost overall feed efficiency.