Method for controlling quantity of algae in eutrophic shallow lake

A technology for eutrophication and shallow water, applied in chemical instruments and methods, polluted waterways/lakes/ponds/rivers treatment, biological water/sewage treatment, etc.

Inactive Publication Date: 2015-05-06
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on this, the present invention proposes a method for controlling the algae quantity in eutrophic shallow lakes, and there is no precedent for controlling the algae quantity by this method at home and abroad

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Utilize bottom fish crucian carp to control suspended matter concentration method described in the present embodiment, adopt the following steps:

[0018] In the three ponds of the Taihu Lake Ecosystem Research Station of the Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, each pond has an area of ​​100 square meters, a water depth of 1.5 meters, and a sediment depth of 20-25 centimeters. Use crucian carp to control the concentration of suspended solids, and then add zooplankton-eating fish-meal strips. Drain the water before feeding crucian carp to avoid the influence of other fish. The quantity of crucian carp put in is controlled at 50 grams / square meter, 65 grams / square meter and 80 grams / square meter respectively, and the amount of meal sticks is the same, 35 grams / square meter. One month later, the concentration of suspended solids, the number of macrozooplankton and the concentration of chlorophyll a (representing the number of algae) ...

Embodiment 2

[0020] Utilize bottom fish carp to control suspended matter concentration method described in the present embodiment, adopt the following steps:

[0021] In the three ponds of the Taihu Lake Ecosystem Research Station of the Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, each pond has an area of ​​100 square meters, a water depth of 1.5 meters, and a sediment depth of 20-25 centimeters. Carps were used to control the concentration of suspended solids, and then the zooplankton-eating fish - silver carp were added. Drain the water before stocking carp to avoid the influence of other fish. The amount of carp put in is controlled at 50 g / m2, 66 g / m2 and 80 g / m2, and the amount of silver carp put in is the same, 40 g / m2. One month later, the concentration of suspended solids, the number of macrozooplankton and the concentration of chlorophyll a (representing the number of algae) in the water body were measured. Put 50 g / m2 in the carp pond, the concent...

Embodiment 3

[0022] The method for controlling the concentration of suspended solids by using the bottom fish herring described in the present embodiment adopts the following steps:

[0023]In the three ponds of the Taihu Ecosystem Research Station of the Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, each pond has an area of ​​100 square meters, a water depth of 1.5 meters, and a sediment depth of 20-25 centimeters. Black carp was used to control the concentration of suspended solids, and then the zooplankton-eating fish - silver carp was added. Drain the water before stocking herring to avoid the influence of other fish. The amount of black carp put in is controlled at 50 g / m2, 60 g / m2 and 80 g / m2, and the amount of silver carp put in is the same, 38 g / m2. One month later, the concentration of suspended solids, the number of macrozooplankton and the concentration of chlorophyll a (representing the number of algae) in the water body were measured. Put 50 g / m2...

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PUM

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Abstract

The invention provides a method for controlling quantity of algae in a eutrophic shallow lake. Control of large zooplanktons on algae is improved by reducing predation of fishes of eating zooplanktons on large zooplanktons, so that the target of treating water bloom is reached.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration, and relates to a method for controlling algae quantity in eutrophic shallow lakes. Background technique [0002] With the development of society and economy, the eutrophication of lakes in our country is becoming more and more serious. Facing such a severe lake eutrophication situation, lake governance is particularly important. In addition to controlling exogenous and endogenous loads in lake governance at home and abroad, the governance methods implemented in lakes mainly rely on ecological restoration based on the adjustment of ecosystem structure. By regulating the food web structure inside the lake, it can promote the restoration of aquatic vegetation and achieve the purpose of improving water quality. [0003] The regulation of the food web structure inside the lake is mainly realized through the control of the fish community structure. With the eutrophication of the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCC02F3/327C02F2103/007C02F2303/20
Inventor 陈非洲关保华胡耀辉刘正文
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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