CATDOLL : CATDOLL: Grass carp farming conditions and costs (What is the profit of one acre of grass carp pond?)

1. I want to raise grass carp. How many can I raise per acre of land? How much money can I make in a year?

Personally, I suggest that for fish farming as an entrepreneurial project, you can raise multiple types of fish together. Fresh water is suitable for mixed farming, which is beneficial to the ecological balance of the pond. It is not cost-effective to only raise grass carp.

I'll give you a rough idea: one acre of land can raise about 1,500 to 2,000 grass carps. There is no definite figure for how much money you can make in a year. Fish farming is not like raising other species, which can be accurately calculated. The value created by the different breeding techniques and management models of fish fry is different. It depends on your specific situation, local conditions and environment, water resources, natural disasters and other factors, so the income is also different.

The following is a friend's actual experience shared for your reference:

How many grass carp can be raised per acre depends on the amount of feed and seedlings released. Under normal circumstances, it is normal for commercial fish to produce about 1,500 to 2,000 kilograms per acre, and it is common for farmed seedlings to produce about 700 to 800 kilograms per acre.

Taking the yield of 400 kg of adult fish per mu as an example, the stocking ratio is: 450 silver carp, 35.5 kg; 40 bighead carp, 4 kg; 60-80 grass carp, 15-20 kg; 20 carp, 1 kg; 50 bighead bream, 2.5 kg; 100 crucian carp, 3 kg; 6-8 black carp, 4 kg. Although the proportion of high-quality fish in this stocking ratio is not high, the cost of fish species is low, the investment risk is small, the individuals of high-quality fish are large, the weight gain multiple is high, and the benefits are good. This model can also be changed to focus on high-quality fish, with the number of grass carp increased to more than 100, the number of bighead bream increased to more than 150, and the number of silver carp reduced to 350-400. The characteristics of this model are high investment and high benefits.

2. Grass carp breeding methods and profits.

The cost of raising 1 mu of grass carp is about 500 yuan, and the output can reach about 500 catties, which can be sold at about 5 yuan per catty, so the income from grass carp is about 2,500 yuan. After deducting the cost of raising grass carp, the profit is about 2,000 yuan. Grass carp is an important freshwater farmed fish in my country. Together with silver carp, bighead carp and black carp, it constitutes the four major carps in my country.

1. Fish species cost

Grass carp is generally raised in mixed culture, mainly grass carp, and then mixed with appropriate amounts of silver carp, bighead carp and other fish species. Generally, one acre of pond can raise 30 kilograms of silver carp, 3 kilograms of bighead carp, 60 kilograms of grass carp and an appropriate amount of bream, etc., and the cost of fish species is about 500 yuan.

2. Feed costs

Generally, one mu of fish pond needs to be fed about 760 kilograms of feed each year, with a total cost of about 1,300 yuan.

3. Other costs

It mainly includes various miscellaneous expenses such as fertilizers, medicines, water and electricity, which require a total of about 2,100 yuan.

3. Grass carp breeding technology and density.

300 grass carp weighing 200-250 grams per tail are released per mu.

Conventional grass carp farming is mainly based on mixed farming, which takes three years to cultivate, with high costs and long capital investment. The pollution-free grass carp high-yield, high-efficiency and rapid farming technology is introduced as follows.

1. Pond requirements: The pond area should be 10-20 mu, the water depth should be 2-2.5 meters, and the silt thickness should not exceed 20 cm. Every 10 mu pond should be equipped with 1 3 kW aerator and 1 automatic feeding machine.

2. Pond cleaning: Drain the pond water in winter and freeze it for more than 20 days. 15 days before stocking the fish, add 10-20 cm of water and use 150 kg of quicklime per mu to clean and disinfect the pond.

3. Fish stocking: Before and after the Spring Festival, stock 300 grass carp with a weight of 200-250 grams per tail, 300 crucian carp with a weight of 15-20 per kilogram, 50 silver carp with a weight of 5-6 per kilogram, and 10 bighead carp per mu. Soak the fish in 5% salt water for 5-10 minutes for disinfection before stocking.

4. Feeding: Feed mainly with pellet feed, the protein content of feed is 28-32%, supplemented with green feed. Feed feeding follows the principles of "coarse first and fine later" and "four determinations and four observations". Generally, feed twice a day, and it is advisable to finish eating within 2 hours and feed 80% full of grass carp. From March to June, feed mainly with pellet feed with a protein content of 28%, the daily feeding rate is 3%, and feed green feed in moderation; from July to September, control the feeding amount of pellet feed, the daily feeding rate is about 1.5%, the protein content of pellet feed is 28%, increase the feeding amount of green feed, and control the occurrence of fish diseases; from October to November, feed pellet feed with a protein content of 32%. After feeding pellet feed continuously for a period of time, stop feeding pellet feed for 1 week, and feed raw grain feed during the interval. Usually pay attention to adding vitamins and other drugs in the feed in moderation to avoid grass carp suffering from diseases such as hepatobiliary syndrome and causing large-scale deaths.

5. Water quality management: Use the aerator correctly. In sunny and windless weather from June to October, turn on the aerator for 2 hours every afternoon from 1 to 3 pm, and add oxygen at the right time in the early morning. Add oxygen earlier on cloudy days. Add new water to the pond in a timely manner, and adopt the method of "small discharge and small inflow, multiple water changes" to gradually control the water quality. From June to September, add new water once every 3-5 days, adding about 10 cm of water each time. Every 15-20 days, use 10-20 kg of quicklime to make a slurry and sprinkle it all over the pond once per acre of water surface and 1 meter of water depth.

6. Disease prevention and control: Use the method of "coarse first and fine later, fine and green combined" to control the occurrence of grass carp hepatobiliary syndrome. Common diseases of grass carp include red skin disease, gill rot disease, and enteritis. Generally, a combination of oral and external treatment is adopted. External spraying mainly uses bleaching powder, chlorine dioxide and other disinfectants, which are used for 3 consecutive days; oral administration with "three yellow powder" bait has a better effect. For every 50 kg of fish body weight, 0.3 kg of three yellow powder (50% rhubarb, 30% phellodendron, 20% scutellaria, crushed into powder and stirred evenly) is mixed with flour paste and mixed into the feed for feeding, and used for 3-5 consecutive days.

7. Timely fishing: timely catching large-sized adult fish is an important measure for high-yield grass carp farming. The main purpose is to reduce the fish carrying capacity of the pond water and promote the rapid growth of pond fish in the later stage. Generally, the fishing is carried out once at the end of July, in the early morning when the water temperature is lower.