Breeding method for grass carp fingerlings

Abstract

The invention relates to the field of grass carp feeding, in particular to a breeding method for grass carp fingerlings. The method comprises the following steps: planting waterweeds in a cultivation pond for breeding the grass carp fingerlings, wherein the waterweeds comprise eel grass, hornwort and hydrilla varticillata; feeding fries in the cultivation pond with baits until the fries grow into the grass carp fingerlings. The breeding method for the grass carp fingerlings, provided by the invention, has the advantages that by planting the three waterweeds namely the eel grass, the hornwort and the hydrilla varticillata in the cultivation pond, the waterweeds interact with the grass carp fries in the growth process, the bred grass carp fingerlings are good in physique and exuberant in vitality, and the liver and gall syndrome cannot be caused in the growth process and the subsequent cultivation process.

Description

technical field [0001] The invention relates to the field of grass carp breeding, in particular to a method for cultivating grass carp species. Background technique [0002] Grass carp is an important species of farmed fish in my country, and the output of grass carp in inland areas generally accounts for about 40% of the total freshwater fish. Grass carp species with sufficient quantity and excellent quality are an important guarantee for realizing this pattern. [0003] Grass carp hepatobiliary syndrome is a common and harmful disease in ponds where grass carp is mainly raised. It mostly occurs in intensive high-yield ponds and mainly harms grass carp fingerlings and adult fish. The death of grass carp began in early May, and there was no obvious peak period for the death of fish in affected ponds, but the disease course was longer and the recurrence rate was high; the mortality of adult fish and large-sized fish species in ponds was higher than that of small-sized fish s...

AI Technical Summary

Problems solved by technology

The death of grass carp began in early May, and there was no obvious peak period for the death of fish in diseased ponds, but the disease course was longer and the recurrence rate was high; the mortality rate of adult fish and large-sized fish species in ponds was higher than that of small-sized fish species

[0006] 2. Environmental factors The pond has been used for many years and has not been dredged. The silt at the bottom of the pond becomes thicker and the pond becomes shallower. The adjustment can not keep up, leading to the deterioration of the pond environment; frequent drug abuse causes the accumulation of toxic substances in the pond, causing chronic poisoning of grass carp to damage the liver

[0007] 3. Drug factors At present, chemical drugs are the main method of fish disease prevention and treatment, and repeated and excessive use of chemical drugs for a long time will cause drug-induced liver injury

However, due to the small size of grass carp species used in cultivation, the method is not suitable for the cultivation of grass carp species due to their poor absorption of Chinese herbal medicine preparations.

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