Method for ecologically breeding macrobrachium rosenbergii by growing grass in pond

Abstract

The invention belongs to the field of aquaculture and specifically relates to a method for ecologically breeding macrobrachium rosenbergii by growing grass in a pond. The method comprises the following steps: (1) pond selection and reconstruction: making the area of a grass growing and shrimp farming pond be 6-10 mu, keeping the grass growing and shrimp farming pond rectangular, long in a direction from the east to the west and wide in a direction from the south to the north, and keeping the length-to-width ratio at 2:1; (2) initial fry putting and grass growing: keeping the water depth of thepond at 70-80 cm, putting fries into the pond, then, adding new water every other 3-5 days while breeding until a water surface exceeds a grass growing platform and the water depth is 1-1.2 m when the breeding lasts for 25-30 days, growing grass plants in a single row in the center of the grass growing platform; (3) aeration in middle and later periods: starting an aerator for 1-2 h in the noon of a sunny day to promote the convection and uniform mixing of an upper water layer and a lower water layer; and (4) catching: catching large shrimps and remaining shrimps in time after the relativelylarge shrimps reach a specification meeting a market requirement. The grass reasonably grows in the pond, so that an absorption and conversion path of breeding object excrements is increased, the loadof a water body is reduced, and the water exchange quantity is reduced; and a concealing and hiding safety place is provided for molting shrimps, so that the molting shrimps eaten by the same kind are reduced, and the breeding survival rate is increased.

Description

technical field [0001] The invention belongs to the field of aquaculture, and in particular relates to a method for ecologically cultivating Macrobrachium rosenbergii by planting grass in ponds. Background technique [0002] Macrobrachium rosenbergii ( Macrobrachium rosenbergii ) has the advantages of wide appetite, large individual, fast growth, strong disease resistance and rich nutrition. Since it was successfully introduced into my country in 1976, its industry has developed rapidly and has become one of the important economical shrimps in aquaculture in my country. According to statistics, domestic Macrobrachium rosenbergii farming spreads over 16 provinces and cities, with a total farming area of ​​about 500,000 mu and an annual output of more than 1.2×10 5 Ton. However, in actual production, farmers pay more attention to economic benefits than ecological benefits, and blindly adopt the method of large-scale row and large-scale replacement in pursuit of high-yield an...

AI Technical Summary

Problems solved by technology

However, in actual production, farmers pay more attention to economic benefits than ecological benefits, and blindly adopt the method of large-scale row and large-scale replacement in pursuit of high-yield and high-consumption farming, resulting in high emissions of total nitrogen, total phosphorus, and suspended solids during the breeding process. The aquaculture water and the surrounding environment have caused serious impacts, restricting the sustainable and healthy development of Macrobrachium rosenbergii pond culture

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