Reed-fish-shrimp-crab ecological polyculture method for inland soda saline-alkaline reed swamps

Abstract

The invention provides a reed-fish-shrimp-crab ecological polyculture method for inland soda saline-alkaline reed swamps, which includes crab acclimation, stocking densities of fries, juvenile shrimps and juvenile crabs, culture management and catch and reed culture. After the method is adopted, the survival rate of acclimated crabs is 81.3 percent; the average stocking densities of river crabs, fishes and shrimps are 2138 river crabs / hm<2>, 510 fishes / hm<2> and 11750 shrimps / hm<2>, the average catch weights of the river crabs, fishes and shrimps are 87.15kg / hm<2>, 233.30kg / hm<2> and 52.88kg / hm<2>, the average catch specifications of the river crabs, fishes and shrimps are 145.2g per crab, 670.6g per fish and 5.3g per shrimp, the average recapture rates of the river crabs, fishes and shrimps are 26.83 percent, 69.45 percent and 83.63 percent, the average density of reed is increased by 9.69 percent, the average yield is increased by 12.47 percent, and the input-output ratio of the experimental area is 1:3.174.

Description

technical field [0001] The invention belongs to the technical field of aquaculture in saline-alkali land, and relates to a method for compound ecological cultivation of reed-fish-shrimp-crab in inland soda-type salinized reed swamp. technical background [0002] Reed (Phragmites communis) is a common large plant in swamps, widely used in papermaking, medicine, building materials, feed and other industries. 2.5t reed can replace 5m 3 High-quality wood produces 1 ton of paper, so the reed swamp is known as the "second forest". [0003] Reed swamp is one of the main ecological types of inland natural wetlands in my country. In addition to the ecological functions of general wetlands, it also has a high function of providing products such as reeds, fish, and shrimps. It is a high-productivity economy. wetlands. In addition to the chloride-type salinized reed swamps distributed in the coastal areas, there are also large areas of soda-type salinized reed swamps in the inland are...

AI Technical Summary

Problems solved by technology

In recent years, due to land reclamation, climate drought and other factors, the area of ​​reed marshes has gradually decreased, and the soil and water environment has become salinized, resulting in a decline in ecological benefits; and the degradation of reeds has led to a decline in the yield and quality of reeds, and economic benefits have also been affected (the name of the literature is given !Yang Fuyi, Li Xiujun, Liu Xingtu, etc., 2010)

However, there is no patent report on the compound ecological breeding of reed-fish-shrimp-crab in the inland soda-type salinized reed swamp

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