Rugao City Yuanqiao Zhen Zhu Chuanzhong came to the telephone to report that he had more than 1 mu of ponds and he wanted to have blackfish farming, but he had no experience in farming.
The following is a summary of the blackfish pond intensive culture model summarized by Zhang Lin, seven sets of rural agricultural technical service centers in Xiangshui County, for reference.
The pond construction selects muddy bottoms, water depths of 1-1.5 meters, adequate water sources, and ponds that are either water-absorbent or alkaline. The area of ​​fish ponds is preferably 500-1000 square meters. Raise the height of 0.5 meters around bricks, bamboo fences or plastic nets to prevent escape. The area of ​​adult fish breeding ponds is preferably 2,000-4,000 square meters of microfluidic water, and duckweed or water peanuts occupy 1/5 of the total pond area. The water inlet is 30-40 cm above the water surface to prevent the black fish from running against the water.
Clear pond disinfection seed stocks before draining pool water, keep the sediment thickness of about 20 cm, 100 kg of dry lime per acre dry disinfection.
In the first stage of seed rearing, the large-scale fish species are intensively cultivated. In the fall of each year, the black fish fry with an average tail weight of about 50 grams is intensively cultivated, and after about 8 months, the black fish species with a tail weight of about 150 grams are grown into large-sized black fish species. , About 7,500 fishes are stocked on the surface of each acre; in the second phase, in early May of the second year, large-scale fish species that have been cultivated are put into fish ponds and intensively reared, and 450-500 fish are stocked on the water surface per acre. Fry and fingerlings were soaked with 3%-4% saline solution for 10-20 minutes prior to stocking.
The feed for feeding black fish feed is mainly live feeds and artificial feeds such as small tilapia, small trash fish, wheat spike fish, loach, shrimp, etc. 80% ground minced fish and 20% flour or other binders can be mixed into pellet feed. When you start feeding compound feed, you can mix and feed it with leeches, and then gradually reduce the amount of live feed such as leeches until you feed all of the pelleted feed. The content of crude protein in pelleted feed is more than 40%, and the formula is 50% for animal feed (fish meal, livestock and aquatic products waste, blood meal, etc.), plant feed (bean cake, wheat bran, corn flour, etc.) 48%, bone meal 2 %, feeding once a day at 7-8 am and 17-18 pm. During the high season of fish growth, the feed amount is 5%-8% of the total weight of the fish in the pool, and 3%-5% in other seasons. It can be flexibly controlled depending on the season, weather, and fish activity.
Pond management adds water once every 10-20 days, each time adding 20-30 cm of water. In summer and autumn, change the water every 5-7 days to maintain better microfluidic status.
Timely fishing black fish tail weighing more than 500 grams can be caught.
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