Statistics on the total amount of grass carp culture over the years 20

Stocking grass carp is the mainstay, and appropriate polyculture of mrigal, silver carp and bighead carp. Taking 1 mu as an example, the size of grass carp is 250-500 grams, and the stocking density is 400 acres; The size of grass carp is 1000-1250 grams, and the stocking density is 300 acres; dace stocking density of 1500 acres; The size of silver carp is 300-400 grams, and the stocking density is 100 acres; The size of bighead carp is 150-200 grams, and the stocking density is 20 acres. Before stocking, all fingerlings are disinfected with a 4% saline solution for 10-15 minutes.

800 grass carp, 150 crucian carp and 30 bighead carp are placed per mu. Tongwei 126 pond fish compound feed and "fish water condition" buoyancy material are used in a 7:3 ratio.

The combination of submerged material and floating water material not only grows well for grass carp and crucian carp, but also grows evenly, and the feed is not wasted. When stocking, divided into 1-3 taels, 5-7 taels, the maximum one catty of three specifications of stocking, round fishing and release, a year can catch 5 times fish, the average size of 3 catties of weight, mu yield up to more than 4000 catties.

<> high-yield culture of grass carp fingerlings. The pond area is about 4 acres, the average water depth is about meters, and the drainage and irrigation are convenient. According to the party regulations, 75 kg of quicklime per mu is used to completely clear the pond.

About 10 days before the summer fish are planted in the pond, 1 ton of fermented cow dung per mu is applied. When the summer flowers go down to the pond, the water color is yellow-brown, the transparency is 25 cm, and the water depth is meters.

For the stocking of summer fish fingerlings, the main grass carp should be released first, and the multi-species polyculture should be densely stocked to control the stocking time of silver carp. On June 4, 9,300 grass carp summer flowers were released per mu, weighing 6 kilograms. On June 26, 1,744 crucian carp were released in summer, weighing kilograms.

On June 30, 1,172 bighead carp were released, weighing kilograms. On July 1, 2,585 silver carp were released, weighing kilograms, and the total number of silver carp released per mu was 14,751, with a total weight of kilograms.

At the end of the year, 75 grams and 165 grams of grass carp fingerlings were harvested per mu, and 1504 and 1193 grass carp fingerlings were harvested respectively, weighing 310 kilograms. 60 g 1167 crucian carp fingerlings, weighing 70 kg. 70 g 1110 bighead carp, weighing 78 kg.

100 g 2074 fingerlings of silver carp, weighing 207 kg. The average number of fingerlings per mu is 7048, and the output is 665 kg.

After the summer grass carp is put into the pond, it is fed with turnip and duckweed. When the summer grass carp grows to 7 cm, change to feed chopped young grass, 10 cm later, directly feed the grass, the amount of feeding according to the fish growth, feeding and weather conditions, rainy and sultry days less feeding, sunny weather more feeding. The feeding is generally controlled in 3 hours after the concentrate is fed, and the green feed is eaten in 4 to 5 hours.

3260 kg of forage and 1260 kg of concentrate per mu.

Strengthen water quality management, 2 3 days before feeding, widen and inject new water once, add 20 30 cm of water. From mid-July to early October, water is added once a day for 25 to 30 cm. As the number of water injections increases, the water depth is maintained above meters.

After mid-October, water will be added depending on the water quality. Water is generally added at 6 a.m. and around 1 p.m. in the middle of cultivation. In addition to thoroughly cleaning the pond, pay attention to adjusting the water quality after the summer flowers enter the pond.

In the endemic season of fish diseases, every 7 to 10 days, liquor is poured alternately with bleaching powder and quicklime. For different fish diseases, copper sulfate and ferrous sulfate mixture, rhubarb, trichlorfon and garlic were used to feed them.

China is an ancient civilization in the world and one of the birthplaces of the world's fishery, which can be divided into prehistoric fishery activities, traditional fisheries and modern fisheries. Since the reform and opening up, China's fishery productivity has developed rapidly, the production capacity of aquatic products has been greatly improved, and the output of aquatic products in China reached 65.45 million tons in 2020, an increase of 950,000 tons compared with 2019, a year-on-year increase.

Statistics of China's aquatic product production from 2014 to 2020.

China's aquatic product output is divided into two categories from the mode of production: aquaculture and fishing, and can be further divided into marine aquaculture, freshwater aquaculture and marine fishing, freshwater fishing, and ocean fishing according to the nature of the waters. In 2020, China's capture aquatic product output was 13.3 million tons, a decrease of 700,000 tons from 2019. The output of aquaculture aquatic products was 52.15 million tons, an increase of 1.65 million tons compared with 2019.

Statistics of China's output of various aquatic products from 2014 to 2020.

According to the "2021-2027 China Aquatic Product Industry Market Research Analysis and Investment Prospect Planning Report" released by Zhiyan Consulting, China's capture aquatic product output accounted for a relatively small proportion of the total aquatic product output in 2020; The output of aquaculture aquatic products accounts for the total output of aquatic products, accounting for a relatively large amount, and is the main source of aquatic products in China.

China's aquatic product production in 2020.

Aquatic products are nutritious, well-balanced natural food, rich in high-quality protein, vitamins and minerals, etc., deeply loved by people, aquatic products are an important category in the dietary structure of Chinese residents, not only infiltrated in the food culture, and rooted in Chinese culture, even more than (fish), fish and bear's paw can not have both, carp jumping dragon gate and so on are vivid portrayal. As a primary agricultural product for consumption, the main purpose of aquatic product production is consumption. The composition of aquatic product consumption among Chinese residents can be roughly divided into two parts:

The first is household consumption, where residents cook and eat aquatic products at home; The other part is social consumption, mainly in canteens, restaurants, hotels, and takeaway consumption. In 2019, China's demand for aquatic products reached 10,000 tons, an increase of 10,000 tons compared with 2018, a year-on-year increase.

Statistics on the demand for aquatic products in China from 2015 to 2019.

With the improvement of people's living standards, the per capita demand for aquatic products in China reached kilograms in 2017, and began to decline in 2018, and the per capita demand for aquatic products in China in 2019 was kilograms, a decrease in kilograms compared with 2018, a year-on-year decrease. The per capita consumption of aquatic products in China is not high, far lower than that of Japan, South Korea and Taiwan, which are also located in East Asia, and there is still room for improvement in the future.

The price demand for fish in China is very large, because many people now dare not eat other seafood, so they only dare to eat fish, so it is **.

The domestic demand for fish is still very large, but because of the decline in pork, some people will bias the demand towards pork.

For those of us who don't like to eat fish, we really don't know much, but the magnitude of grass carp **** is indeed not small.

Generally, 100 kg of fish are polycultured, and the other 200 kg of fish are not fed.

Generally, the traditional grass carp culture model is one season a year. Select a pond with sufficient water source, convenient drainage and irrigation, no pollution, and perennial slight flowing water for reconstruction, with a water depth of 2 meters and a silt thickness of no more than 20 cm. Every 10 acres of ponds are equipped with 1 aerator with a power of 3 kilowatts and an automatic feeding machine.

10 15 days before the stocking of fish fry with 7 10 acres of bleaching powder, with water to clean the pond for disinfection, or with 75 acres of quicklime water, while the whole pond is hot.

Fish pond stocking time: The first season can be around the Spring Festival, and the water temperature is put at 6 o'clock. 600 grass carp per mu, with a size of 350 400 grams; 500 bream with a size of 200 250 grams; 100 scales, 300 400 grams; 20 bighead carp with a size of 150 200 grams; 100 carp, the size of 100 150 grams, to ensure that all can be marketed before the Dragon Boat Festival.

The second season starts after the Dragon Boat Festival, and all 600 grass carp fingerlings are stocked, with a size of 150 200 grams. Disinfect with a bath of 4% saline solution for 0 15 min before stocking to prevent various bacterial diseases and water mildew.