Large water surface high-yield breeding method for ietalurus punetaus

Abstract

The invention discloses a large water surface high-yield breeding method for ietalurus punetaus. The large water surface high-yield breeding method comprises the following steps: selecting a water reservoir of 50-300 mu; adding 0.1-0.3kg / mu of 5*10<8> pieces / g lactobacillus, 0.1-0.2kg / mu of 1*10<8> pieces / g bacillus subtilis and 0.3-0.5kg / mu of 1*10<8> pieces / g photosynthetic bacteria in concentration into the water reservoir before fries are launched, launching 50 / mu of silver carp, 70 / mu of weever, 200 / mu of grass carp and 1000 / mu of ietalurus punetaus in density, and powering on an aerator for 2-4 hours per day; throwing feed into the water reservoir in the morning, at noon and at night every day respectively, wherein the feed amount is 40-70kg / mu each time. By adopting the large water surface high-yield breeding method, the immunity of the ietalurus punetaus can be improved, and the survival rate and the growth rate can be increased.

Description

technical field [0001] The invention relates to the field of freshwater aquaculture of aquatic products, in particular to a high-yield aquaculture method for channel catfish in large water surfaces. Background technique [0002] Channel catfish is a worldwide farmed fish, which has the advantages of fast growth, easy feeding, strong adaptability, delicate and delicious meat, etc., so it is very popular with consumers from all over the world. It is consumed in more than 100 countries and regions in the world. Its consumer market is very broad. Channel catfish were originally farmed on a large scale in Guangxi, but due to a large-scale outbreak of acute intestinal sepsis and streptococcosis in channel catfish from 2006 to 2007, resulting in mass deaths and heavy losses for farmers. It has dealt a devastating blow to the enthusiasm of catfish farmers, which has led to the continuous shrinking of the breeding scale of channel catfish in Guangxi and gradually withdrawing from th...

AI Technical Summary

Problems solved by technology

The main reason is that the climate in Guangxi is a subtropical to mid-subtropical monsoon climate, and the temperature is high all year round. As the temperature rises, the environment will be stressed, and its disease resistance will decline; another reason is that the channel catfish farming in Guangxi used to be mainly It is cultured in cages, the breeding density is too high, the movable space is narrow, and the local dissolved oxygen is low, making it in a sub-healthy state for a long time. In recent years, the water body has been seriously polluted, the water quality has become eutrophic, and it is easy to induce diseases and the overall output is low.