Method for improving quality of grass carps

Abstract

The invention provides a method for improving the quality of grass carps. The method comprises the following steps: 1) pond bottom treatment: carrying out disinfection treatment on a pond, laying a later of fine sand and cobblestones at the bottom of the pond, and then laying a layer of beer sludge; 2) pond water treatment: controlling the pH value of water to be 5-6.5, controlling the water depthto be 70-80cm when fry are thrown, then adding water once every 3-5 days to enable the water depth to reach 130-180cm, wherein 10-15cm of water is added every time, and adding a mixed liquid and discharging water every day in the 1-2 months before grass carps are sold on the market, wherein the mixed liquid is a filtrate obtained by stewing tea leaves, honeysuckle flowers and pericarpium citri reticulatae and carrying out filtering and cooling; and 3) grass carp stocking: controlling the stocking density of the grass carps to be 350-400 kilograms per mu and the specification to be 130-140 grams per grass carp, carrying out stocking on salmon fry at the same time, controlling the stocking density of the salmon fry to be 10-30 kilograms per mu, and carrying out feeding by feed, wherein thefeeding amount of the feed accounts for 0.1-0.8% of the total fish weight. According to the method, on the premise that the breeding effects such as the growth period of the grass carps and the like are not changed, the quality of the grass carps can be remarkably improved, and the survival rate of the grass carps and the survival rate of the salmons can be improved.

Description

technical field [0001] The invention belongs to the technical field of freshwater fish culture, and in particular relates to a method for improving the quality of grass carp. Background technique [0002] Grass carp, also known as grass carp, is one of the unique "four major fishes" in my country. It is a typical herbivorous fish. It is rich in nutrients, high in protein, and has the characteristics of fast growth, strong adaptability and high yield. People's main dietary protein. In 2009, the national grass carp aquaculture output was 4.08 million tons, accounting for more than 40% of the total output of the "four major fishes", and its industrial status is very important. [0003] In recent years, with the development of the feed industry, compound feeds have played a role in the cultivation of grass carp with high protein content, fast growth, labor saving and high economic benefits. However, feeding a large amount of high-protein and high-energy bait makes the grass car...

AI Technical Summary

Problems solved by technology

[0005] In foreign countries, research on the artificial breeding technology of migratory Atlantic salmon has gone through a considerable period of time, and has successfully bred triploid salmon, all-female salmon, high-temperature-resistant salmon and other species, and successfully mastered the breeding technology of Atlantic salmon. A large number of fish eggs and fry are produced every year, but these results are limited to the cultivation of migratory Atlantic salmon in seawater. Although my country has invested tens of millions and spent more than ten years on salmon research, it has stagnated in basic applications due to various reasons. Research status, progress is slow. Shandong, Hebei, Beijing and western provinces are all engaged in cold-water fish farming and research, mainly rainbow trout, and the output is increasing at an annual rate of 20-30%. In the exploratory experiment, the survival rate of salmon is low and the cost of breeding is high