How old can silver carp grow in intensive culture in a year

Intensive culture of silver carp can reach the market specification of 4 jin a year, while ordinary culture can only reach about 2 jin, so if you want to reach about 4 jin a year, you need to feed and ensure good water quality. The culture of silver carp should first pay attention to the stocking density, which is too high, which will directly affect the growth of silver carp, so the stocking density should be determined according to the size of the culture pond, and the maximum number of fish per mu should not exceed 300.

Under the condition of good water quality and intensive feeding, silver carp can be raised to about 4 jin a year, but ordinary culture can only reach 2 jin and a half a year.

Stocking density of silver carp

In the culture of silver carp, the first thing to consider is the seedling density, if we do not pay attention to the stocking density, there will be a series of problems, the most important of which is too high density. In order to pursue high yield, farmers often have too high stocking density. In fact, the growth of such fish has been restricted. The fry may be about 1 jin, but it can only grow to a little more than 1 jin after a year. This exceeds the limit of using photosynthesis to cultivate bait to produce silver carp.

If the yield of fish is high, the correct stocking amount should be calculated according to the yield per mu. If the expected yield per mu is 600 jin and the listing specification is about 3 jin, it should be stocked according to 250 pieces per mu, including the damage in the middle of the way. the number of stocking should not exceed 300 per mu at most.

Specifications for stocking fish fry

The stocking specifications of silver carp should be based on local consumption habits and market price trends. In Sichuan, the price of fish is the highest from June to August every year, so the sale on the market in this season can produce the maximum benefit, so the fry released should have at least half of the large size, or all the fry with a large size of more than 1 jin.

The choice of fertilization

Silver carp fertilization mainly uses raw fertilizer, bacteria, chemical fertilizer and organic fertilizer in turn, each fertilizer has its own advantages to ensure the balance of fertilizer intake of fish. Silver carp culture, there is also the use of a lot of fertilizer, but the water is not fat up, then need to be based on experience, experimental fertilizer water. The most commonly used thing for many breeders is to add compound lactic acid bacteria and carbon source amino acids together, which can quickly fertilize the water.

Frequency of fertilization

The frequency of fertilization can be referred to the feeding of intensive sugar. For silver carp raised by fertilizer and water, fertilizer is usually applied once every 3 days. If the photosynthesis is weak in cloudy days, fertilizer is also needed. If there is no fertilization in cloudy days, powder is needed to ensure the food intake of fish.

Culture proportion of silver carp

The culture of silver carp depends on the specifications of the pond. if the organic fertilizer is sufficient, the proportion of silver carp can be increased, and it is also necessary to supplement bacteria, nitrogen and phosphorus to the water particles. The more the amount of supplement, the greater the proportion of silver carp, up to 80%.