A method for adjusting the water quality of eel ponds raised in net cages

Abstract

The invention discloses a method for adjusting the water quality of eel ponds raised in net cages, which includes stocking the pomfret and using probiotic preparations, replacing the net cages with large meshes, adding granules to the bottom, and disinfecting and sterilizing the water body in the net cages. . The present invention improves the water quality of eel ponds in net cages through biological adjustment, physical adjustment and chemical adjustment methods. Below 0.2 mg / L, below 0.1 mg / L of nitrite, below 0.05 mg / L of hydrogen sulfide, above 5 mg / L of dissolved oxygen, and water transparency of 35-40 cm.

Description

Technical field [0001] The present invention is the field of aquaculture technology, involving a regulation method of water quality of pond ponds. Background technique [0002] Monopterusalbus is commonly known as catfish, which belongs to the belonging to the hard bone fish, the gills, the gills, and the genus Yellow, which are mainly distributed in China, Vietnam, North Korea, Thailand, and Japan.Catfish is one of the well -known fish in my country in recent years. Its main breeding areas are spread in Hubei, Hunan, Anhui, Jiangxi, Zhejiang and other provinces in the middle and lower reaches of the Yangtze River.Podge breeding has become one of the leading industries of the aquaculture industry in these regions. [0003] For a long time, the methods of artificial cultivation of Huangya are three types: pond farming, rice field breeding and cage breeding. In recent years, the area of yellow cricket breeding has expanded year by year. In addition to a small number of rice field b...

AI Technical Summary

Problems solved by technology

[0005] Cage culture of rice field eel is currently the main breeding method of rice field eel in my country. This farming method has the following disadvantages: (1) The feed of rice field eel is high-protein compound feed and surimi, and rice field eel excrement and residual feed pollute water quality greatly; ( 2) The mesh is small, generally 30 mesh / cm2, which is easily blocked by sludge, algae, and eel excrement. The water exchange inside and outside the cage is poor, and the water quality in the cage is easy to deteriorate; High morbidity, slow growth, large feed coefficient, low benefit, and high risk of breeding

The water quality adjustment of traditional cage culture rice field eels is mainly based on changing water and splashing quicklime water. Changing water will pollute the environment. If more than 1 / 3 of water is changed at one time, it is easy to cause stress reaction of rice field eels, and it is difficult to carry out in places with poor water sources; rice field eels like acidic environments. Quicklime water is alkaline, if used in large amounts or frequently, it will affect the growth of eels