Autumn is the right time for fattening famous fish

As the saying goes, "people are afraid of getting poor when they are old, while ponds are afraid of the emptiness of September." In September, autumn is high and crisp, which is a good time for sea and fresh water famous and special fish to fatten and grow. All localities must strengthen water quality management, intensive feeding, and scientific feeding, so that these fish can gain meat and fat and meet the listing specifications before and after New Year's Day, in order to increase weight and increase income. Several key technologies during the fattening period are introduced as follows:

First, timely more, good feed should be based on the diet of different fish. Osmanthus fish is a fierce carnivorous fish, good at eating fresh dace, dace, white chain, common carp, crucian carp, wheat fish and so on. Generally, the body length of the feed fish is about 3% of the body length of the sweet-scented osmanthus fish, which is too small to eat, too big to swallow, and the daily feeding amount is about 3%-5% of its body weight, once a day, not for several days, so as not to be full when hungry, and small miscellaneous fish with hard spines on the dorsal fin (such as tilapia, etc.) cannot be used as feed fish to avoid stabbing the mouth, intestines and stomach of the sweet-scented osmanthus fish. California perch is an omnivorous fish. if fresh wild mixed fish are put in, feed fish should be cut into small pieces or ground into meat and mixed with peanut bran, bean cake meal and corn meal. Generally, they are fed twice at 10:00 and 5 p.m. every day, with a daily dose of 5% to 7% of their body weight. Sharp snout bass are also mainly fed on chilled seawater small miscellaneous fish, with a daily feed of 6% to 8% of their body weight. After a period of domestication, they can also be fed with special artificial formula feed. The eel mainly eats artificial formula feed containing more than 40% protein. For every 100 kg of powder feed, 130 kg of water and 5 kg of fish oil are added to the powder feed. The eel is mixed into a ball in a winch mixer and then fed. Every 50 kg of eel is 2-3 kg for each meal. It is fed twice at 9 am and 5 pm, so that it can eat well, grow faster and grow bigger. In addition, according to the cloudy and sunny day, water temperature, fish appetite, appropriate increase or decrease, in order to improve the utilization rate of feed and the growth rate of fish.

2. Do a good job in water quality regulation. According to the tests of relevant scientific research institutions, when the daily dissolved oxygen in pond water is more than 4 mg per liter, the amount of nutrients digested and absorbed by fish in feed is 2 times higher than that when dissolved oxygen is 2 mg. However, if the water quality is more fertile, plankton (mainly algae) in the pond water is very rich. These algae absorb oxygen at night and before sunrise in the morning and release carbon dioxide. Oxygen is the most scarce at this time of day, which often makes famous and high-quality fish swim rapidly to the surface of the water, consuming a lot of physical energy, unhappy life and loss of appetite, resulting in the phenomenon of "one day floating head, three days not long". If the water is not added and changed in time, the famous and high-quality fish will have a great loss of appetite and disease resistance, and will soon get sick, so change the water first in the morning or at night, and then increase the water depth to more than 2 meters. Make the transparency of the pool water more than 40 cm In addition, eel ponds use 0.5 grams of trichlorfon per cubic meter of water in the morning, and sweet-scented osmanthus fish and @ # @ 243 fish ponds use 0.5 grams of copper sulfate and 0.2 grams of ferrous sulfate per cubic meter of water to disinfect the pond water, which can not only kill plankton competing with fish for oxygen, but also achieve the purpose of purifying water quality and preventing fish diseases.

Third, do a good job of graded rotational farming, fishing and replenishment. Many farmers mistakenly think that after winter, the weather is getting colder and the water temperature is low, and most famous and high-quality fish stop growing, so they are greedy for convenience and often catch all the large and small fish on the market. This is not desirable, because osmanthus fish, California perch and other wide-temperature fish, the water temperature can still look for food and grow within 7 ℃, but the growth rate is slow. Therefore, all localities must remind farmers that it is better to catch large and stay small, cultivate small fish in ponds, strengthen management, earnestly do a good job in feeding, carry out out-of-season breeding, and strive to be evenly listed this winter and next spring, so as to ensure the efficiency of the fishery and increase the income of farmers.