Loach fry breeding method

Abstract

The invention discloses a loach fry breeding method which includes the steps: sunning a V-shaped breeding pond until cracks and white coverings are formed at the bottom of the V-shaped breeding pond, and then injecting non-pollution water into the V-shaped breeding pond; placing chlorella into the pond to cultivate the water two days before feeding water spots into the pond, and adding the chlorella into the breeding pond every three days; adding tubificidae into the breeding pond after 7 days, performing pest control by fish insecticides with traditional Chinese medicine materials within 7-9 days; stopping use of the chlorella and mainly using the tubificidae and fish mash feed with 32 proteins after 14-16 days; stopping use of the tubificidae and completely using the feed for breeding after 22-24 days. The dosage of the fish insecticides is 0.4 gram per cubic meter of water, the usage amount of the feed is 80 grams per 10,000 loach fries every day, and finished inched fries are obtained after 28-30 days. The loach fry breeding method has the advantage that the survival rate of loach fry production is high.

Description

technical field [0001] The invention belongs to the technical field of aquatic products, and in particular relates to a method for cultivating loach seedlings. [0002] Background technique [0003] The traditional loach seedling nursery pool adopts a flat bottom design. Loach seedlings need different water depths in different sunlight and different climates. The flat bottom relies on manual adjustment of water depth, which wastes water, is labor-intensive, and is not accurate; the opening material uses egg yolk, milk and fertilizer water. Method, we found that egg yolk and milk are indigestible as opening feed loach seedlings, and what fertilizer water adopts is the nursery pond under organic fertilizer, which will produce toxic and harmful substances in the water cultivation process; loach seedlings are very sensitive to strong light (in the nursery stage The survival rate is high in rainy days, and the survival rate is low in sunny days). Thereby traditional loach seedl...

AI Technical Summary

Problems solved by technology

[0003]The traditional loach nursery pool adopts a flat-bottomed design. Loach seedlings need different water depths in different sunlight and different climates. Large and imprecise; egg yolk, milk, and fertilizer are used as feed materials. We found that egg yolk and milk are indigestible for loach seedlings. Produce toxic and harmful substances; loach seedlings are very sensitive to strong light (the survival rate is high in rainy days during the nursery period, and the survival rate is low in sunny days)

Thereby traditional loach seedling survival rate is less than 10%, and Chinese Patent Publication No. CN101331858A disclosed on December 31, 2008 " a kind of loach nursery culture technology " and it mainly exists following problem:

[0005] (2) The use of basal fertilizer. It is a wrong practice to use organic fertilizer as basal fertilizer in the production of loach seedlings, because organic fertilizer produces microorganisms in the water body at the same time Harmful substances are also produced, which will reduce the dissolved oxygen in the water and increase the pH value, which will cause the loach water flower seedlings to stop eating

[0006] (3) Soymilk opening, the production of freshwater fry used to use soy milk in the traditional fry opening, but later research found that it is not soy milk that the fry eat, but soy milk Protein will produce algae and microorganisms in the process of fertilizing water in the water body, but there is a problem. After the soy milk enters the pond, there is a fermentation period of 48-60 hours before the algae and microorganisms are produced. During this fermentation period, the dissolved oxygen in the water body is lower than Below 1-1.5 mg\L, the pH value will exceed 9.2, which is one of the reasons for the high mortality rate of loach water flower seedlings in the pond for 3 days

(4) Ignore the impact of direct sunlight on loach seedlings. Loach is a bottom fish and generally inhabits aquatic plants and silt in the natural environment. Strong sunlight has a greater impact on it, which will cause environmental discomfort and cause emergency response. This is also air bubble disease. One of the important reasons for the formation of