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Method for purifying water quality

A technology for purifying water and fertilizing water, applied in the field of water purification, can solve the problems of increasing stocking density and feeding amount, deterioration of aquaculture water environment, low economic benefits, etc. Effect

Inactive Publication Date: 2015-09-23
SHANGHAI OCEAN UNIV +1
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AI Technical Summary

Problems solved by technology

In some areas, due to the one-sided pursuit of production, the increase in stocking density and feeding amount has caused the deterioration of the aquaculture water environment.
The quality of river crabs raised in deteriorating water quality is poorer than that of river crabs raised in ecological clear water, and the economic benefits are low

Method used

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  • Method for purifying water quality

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Embodiment

[0062] 1. Crab Pond Construction:

[0063] The crab pond should be selected in a place with sufficient water source, no pollution of water quality, less silt at the bottom of the pond, and a relatively secluded location. It requires convenient irrigation and drainage, electricity, and access. The size and shape of the crab pond are advisable with the standardized rectangle, and the area can be from several acres to tens of acres. The present embodiment is 10.14 acres, and the maximum water depth of the pond is about 1.8 meters, which is convenient for water quality control. The bottom of the crab pond is flat, the bottom mud is preferably 10-15 cm, and the bank has a certain slope, with a slope ratio of 1:3 or more. The key to the construction of the crab pond is the anti-escape facility. The commonly used anti-escape facilities are aluminum skins, which have a smooth and strong surface, and have the characteristics of long service life, convenient installation, and low price...

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Abstract

The invention relates to the water quality purification field, and especially relates to a method for purifying water quality; the method achieves a purpose of purifying the water quality by pond culture of Chinese mitten crab. The method for purifying the water quality includes the following steps: desilting and tidying a pond, namely carrying out desilting treatment on excessive silt in the crab pond; clearing and drying the pond, namely mixing quick lime, a bleaching powder and tea meal and clearing the pond; putting aristichthys nobilis and a first generation of freshwater shrimps in the middle ten days of February; putting crab seedlings in the first ten days of March; putting margarya melanoides before and after Tomb-sweeping Day in batches; harvesting the freshwater shrimps with a ground bamboo cage in the middle ten days and the last ten days of June; putting a second generation of freshwater shrimps in the first ten days of July; harvesting the crabs, the freshwater shrimps and the aristichthys nobilis from October to November; and during the culture process, carrying out fertilization water treatment and planting waterweeds in the crab pond. Through the intercropping breeding mode, aquatic products are cultured while the water quality is purified, and the obtained cultured river crabs have good quality.

Description

technical field [0001] The invention relates to the field of water quality purification, in particular to a method for purifying water quality. The method achieves the purpose of purifying water quality by cultivating mitten crabs in ponds. Background technique [0002] Chinese mitten crab Latin name: Eriocheir sinensis Milne-Edwards, English name: Chinese mitten crab, belongs to Decapoda (Decapoda) square crab (Grapsidae) mitten crab (Eriocheir), also known as river crab, hairy crab, clear water crab, hairy crab Or crab is one of the famous and high-quality cultured species in my country's inland waters at present. Its breeding scale is gradually expanding, and its breeding output is constantly improving. The natural distribution area of ​​Chinese mitten crab is mainly in northern Asia, western Korea and China. China is distributed from the mouth of the Yalu River in Liaoning in the north, to the Jiulong River in Fujian in the south, and to the mouth of the Three Gorges in ...

Claims

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Application Information

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IPC IPC(8): C02F3/32A01K61/00
CPCY02A40/81Y02W10/10
Inventor 马旭洲王高龙王友成
Owner SHANGHAI OCEAN UNIV
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