Method for culturing river crabs and grass carps in a pond

Abstract

The invention discloses a method for culturing river crabs and grass carps which is capable of controlling aquatic, improving water quality and saving manpower and characterized by the following steps: selecting the pond whose acreage is 20 mu-100 mu and dividing the pond into a grass carp culture area and a river crab culture area by a blocking net, wherein the stocking density of the grass carps in the grass carp culture area should be 600 ind. / mu-1000 ind. / mu and the average body weight of the grass carp is 50 g; the stocking density of the river crabs in the river crab culture area should be 600 ind. / mu-1000 ind. / mu and the standard of the river crab is 40 river crabs / jin-100 river crabs / jin; fishing out the aquatic floating on the water surface of the river crab culture area and transferring the aquatic to the river crab culture area in May to September of a culture busy season; maintaining dissolved oxygen content not below 4 mg / L in the water body of the river crab culture area, wherein culture management in the grass carp culture area is the same to grass carp pond culture mode. The method has reasonable layout and arrangement, effective aquatic control. The method ensures oxygen required by culture to optimize the whole pond culture ecology environment. The method protects the water environment of the pond and advances more than 28% of culture total benefit.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a method for cultivating river crabs and grass carp in the same pond. Background technique [0002] China is a big aquaculture country, accounting for more than 65% of the world's total aquaculture, and river crab is a famous and high-quality aquatic product unique to my country. Since the success of artificial breeding of river crab, China's river crab production has increased rapidly. The annual output increased from more than 8,000 tons in 1991 to 500,000 tons in 2004. In 2010, the area of ​​river crab breeding was 12.33 million mu, the output was 489,000 tons, and the output value was 20 billion yuan. And the output of pond culture plays an important role in the output of river crab. [0003] In the mode of cultivating river crabs in ponds, many polyculture models of river crabs and other aquatic animals have been explored: for example, river crabs are mixed with herbiv...

AI Technical Summary

Problems solved by technology

However, in the breeding process of river crabs, a large number of aquatic plants such as Elodea, Erythrina, and hornwort need to be planted for the crabs to hide and feed. In the peak production season from May to September, the ponds are hypoxic due to the large growth of aquatic plants and duckweed. , Aquatic weeds rot and cause water quality to deteriorate, and it takes a lot of manpower to remove aquatic weeds