CATDOLL : CATDOLL: Raising bigmouth catfish in lotus root pond, what kind of feed is good to use, how many bigmouth catfish can be raised in one acre of land

1. What kind of feed is good for raising bigmouth catfish in lotus root ponds? How many bigmouth catfish can be raised in one acre of land?

If you raise catfish with lotus roots, you can raise 2,500 fry of 8 to 10 cm per acre. No feed is needed, but animal waste can be used for feeding. The yield per acre is basically around 1,700 kilograms. "It is recommended to raise ditch catfish"

Search: Raising bigmouth catfish in lotus root pond, what kind of feed is good to use, how many bigmouth catfish can be raised in one acre of land

2. Can one acre of land raise 800,000 catfish?

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He Wanshun, a farmer in Shandong, has overcome the difficulty of high-density catfish farming and raised 800,000 catties of fish per mu of land, which is twice the density of ordinary farmers. Although the breeding density is high, the fish raised grow fast and have good quality. They are fat and plump, and have passed the pollution-free food certification.

3. What are the four major carps, and which one has the highest economic benefits in farming?

There are four kinds of fish, and the economic benefits of breeding black fish are the highest. There are many varieties of edible fish now, such as black fish, crucian carp, bighead carp, silver carp, grass carp, herring, etc., which makes consumers have many choices. Therefore, for farmers, they should breed fish with certain advantages among many fish varieties such as catfish. Catfish is a relatively common fish with high market demand, rich nutrition and excellent taste, so it can be considered for breeding. So, how much profit can a pond bring for catfish? Catfish can be intensively farmed and high-density farmed, and the yield per mu can reach 10,000 catties.

According to the current market purchase price of catfish, 3 to 5 yuan per catty, the output value per mu can reach 30,000 to 50,000 yuan. The cost of catfish farming, including 0.28 yuan per seedling, feed, water and electricity, and labor, is not less than 10,000 yuan. In this way, one mu of catfish can bring farmers a profit of 20,000 to 40,000 yuan, and the breeding efficiency is very high. More importantly, the catfish breeding cycle is very short, and it can be sold in 80 to 90 days. Therefore, two batches can be bred in a year, and the annual net income exceeds 40,000 yuan, which is much better than going out to work. In order to better breed catfish and achieve high yields, the best growth environment must be provided. The optimal growth temperature for catfish is 18 to 28 degrees Celsius, the pH value is 7.5, and the water quality is changed regularly to maintain the water quality.

Water quality directly affects the growth of catfish. Therefore, in the process of catfish breeding, we must observe the water quality and find that the water quality can be changed. It is recommended to change the water every half a month, and 30% of the water can be replaced each time; oxygenate the water tank. Due to the high breeding density, catfish have a high requirement for dissolved oxygen, so the dissolved oxygen in the water body cannot be less, and an oxygen generator can be set up. In addition, attention should be paid to the prevention of catfish diseases, such as indiscriminate killing and indiscriminate injury diseases, which are generally thrown out in less than a month, causing blisters on the fry and red and swollen fins.

If things are not done in time, the fry will eventually rot and die. What fish are profitable to farm in fish ponds now? In order to obtain high profits, it is very necessary to breed rare fish, because rare fish can get high returns. Fish farming, this fish is now a very expensive product. It is said that the market price in some places is as high as 200 yuan/jin. Why is it so expensive? It is mainly because fish are very picky about the aquaculture environment. The first quality requires freshness, sufficient dissolved oxygen, and no pollution. It mainly feeds on small fish and shrimps in the pond. So it is easy to breed. At present, with the breakthrough of breeding technology, some farmers can reach 120~150 kilograms per mu, plus sporadic high prices, the profit is considerable.

The easiest ones to recognize are silver carp and bighead carp. Silver carp is divided into silver carp and silver carp. The heads of silver carp and bighead carp are both relatively large, but the head of bighead carp is larger than that of silver carp. The ratio of head length to body length is about 1:3. It is called fathead fish. Silver carp is also called bighead fish. Like bighead carp, it is the first choice for making chopped pepper fish head. Black carp and grass carp are indeed very similar, but the colors can still be identified. The color of black carp is darker, while the color of grass carp is lighter. I think it is more profitable to farm black carp. Because more people eat it.

Among black carp, grass carp, silver carp and bighead carp, farming grass carp has the highest economic benefits, the highest nutritional value and the lowest fat content.

Black carp, grass carp, bighead carp and silver carp; I think breeding black carp is relatively the best and has higher returns.

4. Reasonable density is very important for aquaculture. What is the reasonable density for catfish farming?

Southern catfish is a large carnivorous economic fish, mainly distributed in the Yangtze River system and the larger rivers such as the Pearl River, Minjiang River, and Oujiang River to the south of the Yangtze River. Southern catfish has the characteristics of tender meat, delicious taste, strong adaptability, fast growth rate, short breeding cycle, and good market prospects. Largemouth catfish grows fast in breeding, and the fry can be bred into commercial fish in the same year, so the breeding of largemouth catfish has spread to thousands of households. However, without strict feeding management and key technical measures in the breeding process, it is difficult to achieve good breeding results. Based on many years of experience in breeding southern catfish, the technical measures for breeding southern catfish are summarized for reference.

The newly hatched southern catfish are 4-4.5 mm long, clustered at the bottom of the hatching pond, afraid of light, and cannot swim. After 1-2 days, the yolk sac gradually disappears, and the fry begin to swim freely. At this time, it is necessary to enter the breeding stage in time. For a long time, people have always believed that the fry of the southern catfish cannot be cultivated directly in earthen ponds. Practice has proved that as long as the application method is appropriate, the direct spraying fry cultivation effect in earthen ponds is quite good. The following introduces the cement pond culture method and the earthen pond culture method respectively. The newly hatched fry completely rely on their own yolk for nutrition, which is the so-called endogenous (or endogenous) nutrition stage. After 1-2 days, the yolk sac disappears and begins to swim freely. At the same time, they rely on external food for nutrition, that is, they enter the exogenous nutrition stage. Fry cultivation refers to the process of cultivating spraying fry into fish species of about 3 cm. The nursery pond area is 2-50m2, the water depth is 0.8-1m, and it is convenient for drainage. In the cement pond, the density of spraying fry of the southern catfish can reach 8000-10000 plants/m2.

Use cooked egg yolk to filter through a 90-mesh net to form egg yolk water. Use one cooked egg yolk for every 20,000 spray seedlings. In the seedling stage of largemouth catfish, feed live zooplankton, such as cladocerans, copepods and rotifers once a day from 7:00 am to 8:00 pm and from 7:00 pm to 8:00 pm. Largemouth catfish eat a lot of food, so ensure sufficient fresh bait, especially when feeding at night. Because catfish seedlings are afraid of light and grow in clusters, some coverings (such as tarpaulin, reed mats, fiber tiles, etc.) can be set above the nursery pond for them to live. When the fry grows to 1.5 cm, you can feed them water earthworms appropriately, and cut the water earthworms into pieces when feeding. According to our observation, when catfish grow to 1.5 cm, they have the habit of cannibalism when there is insufficient bait, so the live bait should be sufficient and delicious so that every fry can eat it at any time.

Biofloc refers to particulate matter formed by regulating the nutrient structure in the water body, promoting the proliferation of heterotrophic bacteria in the water body, and combining bacteria, protozoa, algae, organic matter and inorganic matter in the water body through biological flocculation. In the breeding process, by adjusting the carbon-nitrogen ratio in the water, the heterotrophic bacteria in the breeding system are promoted to multiply, and then floc particles containing various microorganisms and small organisms are formed. The nitrogen in the water is absorbed through assimilation and converted into a protein source that can be reused by farmed animals, effectively reducing the content of harmful nitrogen such as ammonia nitrogen and nitrite nitrogen in the breeding water, greatly improving the utilization rate of feed protein, constructing a benign pond ecological nutrient cycle, and promoting efficient, economical, environmentally friendly and healthy development of the breeding industry. However, due to the strong respiration of heterotrophic bacteria during the mass reproduction process, the dissolved oxygen consumption of the water body under the biological floc technology culture condition is significantly higher than that under the traditional culture condition. Therefore, it is necessary to continuously maintain the oxygenation of the culture water body, which also brings about a higher oxygenation cost consumption. Farmers should pay attention.

10,000-15,000 fry (about 3 cm in length) are stocked per acre of pond (water depth 1.5m). Feeding: The daily feeding amount is about 8-10% of the total body weight of catfish, and feeding is done 2-3 times a day.

There are about 15,000 fish fry per acre, and the survival rate of the fish fry is relatively high. This is also a pure breeding model.

The reasonable density of catfish farming should be that for a pond 1.5 meters deep, 10,000 to 15,000 fish fry can be raised in one acre of pond, which is more reasonable.

About 10,000 to 15,000 fish fry are placed in each acre of pond. This density is very suitable for the growth of catfish fry.