Culture method for tilapia in high temperature phase

Abstract

The invention provides a culture method for tilapia in a high temperature phase. The method comprises the following steps: (1) selection of pond specifications: controlling the water depth of a pond at 2-2.5m, wherein the bottom of the pond is a soil-mud layer, and building a sunshade above the pond; (2) management of the pond: changing fresh water once every 6-9 days for the pond, wherein the water changing amount is 1 / 3-1 / 2 of the amount of the water in the pond, and then disinfecting the water with 300-500ml povidone iodine per cubic meter; and (3) management of feedstuff feeding: the feeding amount of the feedstuff is 1 / 3-1 / 2 of a normal feeding amount and is 1-2% of the body weight of a fish; and then feeding a certain amount of green feed, wherein the feeding amount is 0.2-0.3% of the body weight of the fish. According to the culture method provided by the invention, in a high-temperature season in summer, by virtue of a method of building the sunshade additionally above the pond to reduce the water temperature of the tilapia aquaculture pond, properly adding the green feed and reducing the feeding amount of the feedstuff, the in vivo metabolic burden of the tilapia is reduced, and the immunity of the tilapia is improved, and therefore, the breeding survival rate and the economical benefit are improved.

Description

technical field [0001] The invention belongs to the technical field of fish farming, and in particular relates to a tilapia farming method. Background technique [0002] Tilapia is a subtropical fish with the characteristics of miscellaneous food habits, low oxygen tolerance, delicious meat and few spines. It has become the main fish in global farming, and it is also an important species promoted by the Food and Agriculture Organization of the United Nations to the world. my country's tilapia aquaculture production ranks first in the world for many years. The high temperature season is the main growth period of fish, especially from June to September every year, which is the golden time for the fastest growth of fish. However, under high temperature, the reproduction and growth, metabolism and decomposition of organic matter of all organisms in fish ponds are accelerated, which can easily cause imbalances in bacteria and algae, water quality factors, nutrition, etc., so far...

AI Technical Summary

Problems solved by technology

However, under high temperature, the reproduction and growth, metabolism and decomposition of organic matter of all organisms in fish ponds are accelerated, which can easily cause imbalances in bacteria, algae, water quality factors, nutrition, etc., so farmed tilapia is more prone to large-scale diseases

In the high temperature season, the body temperature of tilapia rises with the water temperature, the metabolism of tilapia accelerates, and the oxygen demand increases. It needs to increase the respiration to obtain more oxygen and discharge more heat. However, the respiration of tilapia After the frequency is accelerated, the excretion increases and the carbon dioxide is released quickly, resulting in a large loss of salt, causing electrolyte disturbance and respiratory alkalosis

After the respiratory rate is increased, the tilapia fish body is usually in a state of stress, and its immunity will also decline, and it is easy to be infected with germs, resulting in increased mortality of tilapia fish and reduced breeding benefits