Who knows what the current price of black fry is? Weigh about three fry in a catty.

According to the analysis of industry insiders, the black fish fry in Deqing, Zhejiang Province should not be cheap this year, and the operation of the black fish fry is estimated to continue until next spring. First of all, in terms of supply and demand, this year's black fry seems to be in short supply. Affected by the climate, the cultivation rate of black fish fry (early seedling) in Deqing, Zhejiang Province this year is not high, and the number of seedlings is limited.

The main reason why black fry are difficult to grow is because of the high climatic requirements of black fish fry. In spring, a rain can drop the daytime temperature from 30 degrees Celsius to 20 degrees or even below 20 degrees. Because the black fry are very group in the fish flower stage, a spring rain will cause hypoxia and excessive temperature difference, resulting in the decline of the fry's physique and cause disease.

At this time, once the disease occurs, even if there are millions of fish fry in a pond, they will be wiped out within 2 days. This year, tens of millions of fish in Mr. Yang's pond have died when they turn from black to yellow (that is, when they molt). Secondly, this year's finished black fish fry ** created a record high, the pond finished black fish pond mouth purchase ** reached one pound of yuan, and the pond mouth purchase of aged pond commercial fish ** reached one pound for a period of time.

This, coupled with the swine flu outbreak this year, has invisibly prompted people to increase their preference for aquatic fish, a disease-free food. These two factors will increase the confidence of farmers to invest in seedlings, and it is completely feasible to expand the scale of breeding, and there is no need to worry about sales. At present, many local farmers in Deqing, Zhejiang Province have begun to expand the breeding area of black fish.

With the expansion of the breeding area of farmers, the demand for black fish fry has been increasing, resulting in a significant increase in black fish fry. A few weeks ago, a pound of 70 black fish fry actually came out of the history of 41 yuan a pound**. At present, the ** of 100 black fish fry per catty has been hovering around 40 yuan.

It is expected that in the later stage, with the gradual stabilization of the climate, the survival rate of fish fry will be relatively improved. However, due to the fact that the autumn black fish fry cannot be marketed at the end of the year, it will be sold until the spring of next year (that is, the so-called aged pond black fish), which to a certain extent also causes the autumn black fish fry to be relatively cheaper. However, in Deqing, there are still some people who have not yet cast seedlings because there are relatively few black fish fry in this year's spring stubble.

This is not because the current black fish fry are relatively high, and farmers are reluctant to put ** fry. The main reason is that this part of the black fish farmers also put the autumn black fish fry last year, one by one, and this year it is just to catch the autumn fry.

About 11 yuan a pound of 3 pieces per catty, and the size and specifications are complete.

Generally, the price of wild black fish is 38-45 yuanArtificially farmed black fish is sold at the mercy of 25-30 yuan catty, the nutritional value of black fish is abundant and the meat is delicious, it has the influence of blood tonic and lactation, it is the fish that many families love to eat in our country, and the foundation of the market road sold today is the black fish of artificial breeding.

There are two kinds of black fish sold in the market today, wild black fish and artificially cultivated black fish, wild black fish because it is a natural development, the meat quality and nutrition are better than that of artificial breeding, so the price is relatively higher, the general price is at the mercy of 38-45 yuan catty, and the price of artificially farmed black fish is about 25-30 yuan at the mercy of catty. However, because the wild blackfish are more difficult to catch and the number is smaller, most of the blackfish sold in the market today are artificially farmed.

Answer: There are about 20 pieces of black fish leather of 4-5 cm per catty.

Explanation: Black fish leather is a common leather material imitation, the amount of one pound depends on the size and weight of each fish leather. According to the common ** on the market, the ** of 4-5 cm black fish leather per catty is between 100-200 yuan for the Bila people, and generally speaking, the number of one catty is about 20.

Expansion: Black fish leather is a high-quality leather material, which is made by the ** of black fish after rinsing, tanning and other processes. Its texture is tough, soft, wear-resistant, fold-resistant, waterproof, breathable and other characteristics make it an ideal material for the production of high-end leather goods, bags, clothing, etc.

At the same time, black fish leather is also an environmentally friendly leather material, because it is made from a by-product of black fish and does not cause additional pollution to the environment.

How much is 5-9 cm black fry a year.

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5-9 cm black fry can grow to about 20-30 cm a year. This number will also be affected by various factors, such as water quality, feed, breeding environment, and so on. Therefore, if you want black fish fry to grow faster and healthier, you need to keep the water clean, provide high-quality feed, control the breeding density, etc.

In addition, the growth rate of blackfish is also affected by temperature, and the higher the temperature, the faster the growth rate. Therefore, during the breeding process, the water temperature needs to be adjusted according to different seasons and environments. Water Quality:

Blackfish have relatively high requirements for water quality, and need to keep the water quality clean and stable. Attention should be paid to controlling the discharge of feed and waste, replacing water regularly, and conducting water quality testing. Feed:

Blackfish are omnivorous fish and have relatively loose feed requirements. However, it is necessary to choose high-quality feed to ensure that the nutrient composition of the feed is balanced and avoid water pollution caused by too much feed. Breeding trembling environment:

Blackfish need light and proper oxygen**. Filters, aeration equipment, etc. can be set up in the breeding pond, and at the same time, it is necessary to avoid over-intensive eggplant cultivation and maintain the circulation of pond water and oxygen**. In short, in order for black fish fry to grow healthily and rapidly, it is necessary to consider a variety of factors, maintain clean water quality, provide high-quality feed and a suitable breeding environment.

1. Inject new water, and filter it with a double-layer 80-mesh sieve when entering the water. After the water is ingress, the whole pool of chlorine oxide of the Erxiao Cong is sprinkled and disinfected per mu, and the water quality is cultivated with 2 kg of fertilizer water treasure per mu after three days.

2. Seedling stocking Select high-quality seedlings with strong physique, no disease and neat specifications, and all seedlings are disinfected with 3 5% salt water for 8 10 minutes before putting in.

3. After the stocking of seedlings, the first thing to do is to carry out the artificial domestication and feeding of the feed, the specific method is: set up 1 food table on one side of each pool, the opening bait is mainly based on No. 0 pellet material (special for black fish), supplemented by surimi, feeding 3 kg per mu per day, divided into three times in the morning, noon and evening, the feeder takes the fixed-point throwing and feeding at the side of the food table, after two weeks of domestication, the black fish fry can take the initiative to surface to compete for food; After three weeks, switch to pellet feeding. During the whole breeding period, the protein content of the feed is required to be more than 36%, and according to the growth of the fish body, the particle size of the feed is constantly adjusted, and the palatability is appropriate, the daily amount of bait is 3 7% of the fish weight, and the feed should be appropriate, and the fish should be fed without surplus, so as to prevent pollution of water quality and do not cast mildew feed.

4. The first year grows to 5 grams, the second year grows to 15 grams, the third year grows to 1 tael, the fourth year grows to 3 taels, the fifth year grows to 7 taels, the sixth year grows to jin, the seventh year grows to the inner jin to jin, the first cherry blossom grows to jin to jin in the eighth year, the ninth year grows to jin to jin, and the tenth year grows to 7 jin to jin. This is the law observed in practice for the growth of black-faced fish, and it takes longer for more than 10 catties.