What precautions need to be taken in the cultivation of osmanthus fish
An article filled with practical knowledge, introducing the precautions and key techniques for the cultivation of osmanthus fish, along with related experiences in flower planting. Let's delve into the details together.
Key points and techniques for the cultivation of osmanthus fish: growth habits, pond conditions, capture of fish seedlings, preparations before release, management after release, osmanthus fish are carnivorous and can be fed with shrimp or shellfish, water quality management, concurrent culture of bait fish in the pond, adult fish cultivation methods, and breeding growth habits.
1. Growth habits: Osmanthus fish are typical carnivorous fish. When fed with milk powder, they can be fed dead fish or shrimp. Male fish are mature at three years, females at four years, and they grow rapidly, reaching 50-100 grams in the first year, about 0.5 kilograms in the second year, and 1-1.5 kilograms in the third year.
2. Pond conditions: The pond for raising adult osmanthus fish should have a total area of 3-8 mu, a water level of about 1.5 meters, and 2.5 meters in summer. The bottom should be sandy loam with less humus, sufficient water sources, clear water, and preferably flowing water. Maintain dissolved oxygen levels above 5mg/L, a pH of 7-8, and a clarity of over 30 centimeters.
3. Capture of fish seedlings: The capture and culture of fish should always adhere to the basic principles of quick capture and careful handling. During capture, be cautious and slow in operations to avoid injuring the fish. Capture should be done in the early morning or evening when the weather is cool. Tools such as large cast nets or seines should be used that do not damage the fish. In the same water body, the frequency of casting nets should not be too high to prevent the fish seedlings from floating and dying.
4. Preparations before release: Before releasing fish, all preparations must be made, checking if the water inlets and outlets are intact to prevent water leakage. If any issues are found, they should be addressed immediately. It is also necessary to observe the water quality conditions, especially understanding the fish escape situation in the pond, which helps to determine the species and quantity of fish to be released.
5. Management after release: After releasing the fish, careful management of feeding, fertilizing, water quality adjustment, and disease prevention should be carried out based on the species and quantity of fish released. High-quality feed should generally be used to accelerate fish growth.
6. Osmanthus fish are carnivorous and can be fed with shrimp or shellfish: Various natural foods can be added, including cereals, plants, and processed foods. The number of osmanthus fish in the pond should be known, with a standard of 1,000-2,000 fish per mu.
7. Water quality management: Water should be regularly added and changed, especially from June to September, changing the water every 5-7 days, each time by 15-20 centimeters, to maintain a rich, active, fresh, and tender water surface, promoting the healthy growth of osmanthus fish. Planting submerged plants like water mint and wheelblack algae around the pond provides a hiding place for the fish and also helps improve water quality.
8. Concurrent culture of bait fish in the pond: The culture of bait fish should be completed 15-20 days before the release of osmanthus fish seedlings. Generally, 50-80 thousand taihu carp, common carp, silver carp, and bighead carp are raised per mu for early consumption by osmanthus fish. To reduce the cost of bait fish, fast-breeding bait fish parents can also be raised in the osmanthus fish pond, such as 200-400 pairs of silver carp or 500 two-year-old grass carp per mu, to provide offspring as live bait for osmanthus fish.
9. Adult fish cultivation methods: In the northern region, osmanthus fish seedlings of 4-5 cm are generally raised from May to June. About 1,000 fish per 666 square meters are released, and most of the fish do not reach the commercial fish size by November, with a size of about 350g. To reach a commercial fish size of over 500g, it is necessary to continue raising them until June or July of the following year. However, the price of osmanthus fish, especially live osmanthus fish, fluctuates significantly throughout the year, showing a pattern of low at both ends and high in the middle. Selling osmanthus fish in July and August usually fetches the highest prices of the year. Therefore, using the previous year's method of raising adult osmanthus fish, although the cultivation time is longer, the economic benefits can be good.
10. Breeding growth habits: The breeding season for osmanthus fish is from April to August, with the middle and lower reaches of the Yangtze River from mid-May to early July, and it is later in the northern regions. Guangdong, Guangxi, and Hainan can start breeding in April. The suitable water temperature for breeding is 20-32 degrees Celsius, with the optimal temperature being 25-28 degrees Celsius. Osmanthus fish parents in natural waters have a tendency to gather, especially in lakes and rivers with flowing water, which are ideal spawning grounds. Spawning usually occurs at night and is a multi-batch type, with spawning activities lasting 3-6 hours, and some parents may take a break from spawning for up to 24 hours.
The above is the full content of the precautions and key techniques for the cultivation of osmanthus fish, hoping it will be helpful to plant enthusiasts!