High-yield breeding method of freshwater shrimps

Abstract

The invention relates to a high-yield breeding method of freshwater shrimps. The method is characterized by comprising the following steps: firstly, breeding by using Taihu freshwater shrimps as female parent shrimps, putting selected shrimps into a greenhouse in the middle ten days of every February, warming from the third day after putting in the greenhouse, and increasing 1 DEG C every two days, wherein shrimps molt when the water temperature reaches 16 DEG C; cultivating larva in a cement pond, capturing larva in the first ten days of Arial, putting the captured larva into an automatic sewage disposal nursery pond the first day, then capturing three times every day and putting larva once in the nursery pond, wherein the water temperature is controlled to be between 28 DEG C and 30 DEG C; aerating the nursery pond with a micropore pipe; paying attention to the molting time, changing water and performing Chinese herbal medicine stimulation method once molting is found so that the larva in the same nursery pond finish molting at the same time within 6 hours, so as to lay a foundation for future high-yield breeding; after 23 days when the larva all grow into young shrimps, reducing the water temperature to be the same with the temperature of an outer pond to get ready for putting the young shrimps into the outer pond, wherein the area of the pond for adult shrimps is 5-8mu and the shrimps are stimulated with garlic lixivium when the shrimps are found to molt so that the shrimps can finish molting within 12 hours completely. The method has the advantages of high survival rate and high yield.

Description

technical field [0001] The invention relates to an agricultural production technology, in particular to an early multiplication and high-yield culture technology for aquatic products, in particular to a high-yield culture method for early multiplication green prawns capable of producing more than 250 jin of prawns per mu per year. Background technique [0002] At present, freshwater shrimp farming still uses ordinary farming and breeding, and it depends on the sky. Every year, seedling shrimps are released in May to breed shrimp seedlings. The seedlings are released at the end of June and early July, and the finished shrimps are caught around the Spring Festival. This conventional breeding has the following defects: low yield, finished shrimps only account for 30-50% of the output, and there are many small and juvenile shrimps, ranging from 50-80 kilograms per mu. ?Short breeding cycle 99% of the farmers harvested by throwing chemical drugs into the cages to catch finish...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to invent a high-yield culture method that can carry out early breeding and seedling cultivation in view of the problems that the current freshwater shrimp culture method can only produce one season a year and cannot