Fresh water shrimp culture method

Abstract

The invention discloses a fresh water shrimp culture method, which comprises the steps of weed culture, shrimp postlarvae selection, stocking time selection, and control during shrimp postlarvae culture. The step of control during the shrimp postlarvae culture comprises the steps of: controlling waterweed coverage rate and water body transparency: when the fresh water shrimp culture is in the medium term, particularly fresh water shrimps enter autumn-propagation season (August and September in Yangtze river basin), the waterweed area is controlled to be 40 to 50 percent of the water body area, the transparency is controlled to more than 40 centimeters, and shrimp postlarvae is difficult to survive due to insufficient plankton bait; and killing the autumn-propagation shrimp postlarvae by skillfully using quick lime: during culture, the growth and development condition of the shrimps is frequently observed, particularly when the fresh water shrimps enter the autumn-propagation season (August and September in Yangtze river basin), the egg hatching condition of precocious female is observed, and when eggs of most ovigerous female become grey or transparent or zoea is hatched out, 10 to 14g of quick lime is used for each cubic meter of water body, the quick lime is sprayed to all the pond in six days, and afterwards the quick lime is used once each week to kill the autumn-propagation shrimp postlarvae. The technical measure can reduce 70 to 90 percent of autumn-propagation shrimp postlarvae.

Description

technical field [0001] The invention relates to an aquaculture method, in particular to a method for cultivating freshwater shrimp. Background technique [0002] The prominent core problems in freshwater shrimp farming are the sexual precocity and excessive autumn reproduction of freshwater shrimp. On the one hand, due to the accumulation of nutrients in the gonad development of precocious green shrimp, the growth is slow, the size of commercial shrimp is relatively small, and the market price is low; When the size increases, the juvenile shrimp and the adult shrimp compete for food, oxygen, and space, resulting in the size of the adult shrimp being unable to increase, the commodity rate is reduced, and the commodity price is greatly reduced, which directly affects economic benefits. How to control the precocious puberty and overbreeding of freshwater shrimp has become an urgent problem to be solved in production. Contents of the invention [0003] The main technical sch...

AI Technical Summary

Problems solved by technology

On the one hand, due to the accumulation of nutrients in the gonad development of precocious green shrimp, the growth is slow, the size of commercial shrimp is relatively small, and the market price is low; When the size increases, the larvae and adult shrimp compete for food, oxygen, and space, resulting in the size of the adult shrimp being unable to increase, the commodity rate is reduced, and the commodity price is greatly reduced, which directly affects economic benefits