Method for culturing loach fry into summer fry

Abstract

The invention discloses a method for culturing a loach fry into a summer fry. According to the method, during the front period and middle period of summer fry culture, when the whole length of the loach fry is less than 2.0cm, oxygenation is carried out in a culture pond at night from 24 p.m to 5 a.m of the next day, so that the content of the dissolved oxygen in culture water in the culture pond is maintained to be above 4.0mg / L; and during the later period of summer fry culture, when the whole length of the loach fry is greater than 2.0cm, the oxygenation is carried out in the culture pond at night from 22 p.m to 7 a.m of the next day, so that the content of the dissolved oxygen in the culture water in the culture pond is maintained to be above 3.0mg / L. Experiments prove that the culture survival rate of the loach summer fry obtained by the culture method disclosed by the invention is above 60%, and an unexpected technical effect can be obtained.

Description

technical field [0001] The invention relates to a method for cultivating fish species, in particular to a method for cultivating loach fry to summer flower species. Background technique [0002] Loach is known as "ginseng in water" for its delicious taste, tender meat and rich nutrition. According to analysis, every 100 grams of loach meat contains 18.4 grams of protein, 2.9 grams of fat, and the content of vitamin B1, A, and C is higher than that of other fish. In addition, loach is mild in nature, sweet in taste, and enters the liver, spleen and kidney. It also has high medical value. Therefore, in recent years, the export trade volume of loach has increased year by year, and the consumption of loach in China has also shown an upward trend. [0003] Since the natural loach resources are far from meeting people's consumption needs, the loach breeding industry has also begun to enter a period of rapid development. At the same time, loach has become an important aquaculture...

AI Technical Summary

Problems solved by technology

However, in practical application, it is found that the survival rate of loach from fry to summer flower fish species (above 3.0 cm) has been low, and the survival rate of summer flower fish species in some breeding ponds is even lower than 10%.

In addition, in order to cultivate palatable bait, base fertilizer should be applied to the cultivation pond, and soy milk and other fertilizers should be sprinkled during the cultivation of summer flower fish species. In the later stage of summer flower species cultivation, NH will be easily produced due to the fatter water quality and residual bait 4 Wait for the gas, after the loach swallows the air bubbles, it will cause the loach seedlings to have "bubble disease" and die in large numbers