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Method for maintaining stability of submerged plant community in lake ecosystem

A technology for submerged plants and ecosystems, which is applied in the field of maintaining the stability of submerged plant communities in lake ecosystems, and can solve problems such as collapse, water quality deterioration, and floating of submerged plants

Active Publication Date: 2018-11-06
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with the continuous success of ecological restoration cases in our country, during the operation of the lake’s clear-water ecosystem, submerged plants sometimes appear in large areas in summer and autumn, causing water quality to deteriorate, and the ecosystem to degrade and even have the risk of collapse.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] An ecological restoration demonstration water area in Taizhou, with an area of ​​80,000 square meters, started construction in May 2011. The main ecological restoration measures were submerged plant planting and bottom fish removal. The ecological restoration construction was completed in June, and the ecosystem was transformed into In the clear water state, the main submerged plant species are black algae, bitter grass, eye vetch, foxtail algae, etc. After the clean water system was in operation for three years, that is, in the summer of 2014, some water areas experienced meadow floating, and the water quality deteriorated for a while.

[0021] At the end of February 2015, select a water area with only one dominant species of submerged plants (Little Grass) as the target water area. The target water area is 300 square meters, and the biomass (wet weight) of submerged plants is 1kg / m 2 . Divide the target water area into 30 sub-water areas, each with an area of ​​10 sq...

Embodiment 2

[0023] In a certain lake in Chengdu, there is a phenomenon of meadow floating in part of the waters. Select a submerged plant with only one dominant species and its biomass (wet weight) is 5kg / m 2 The water area is the target water area, and the area of ​​the target water area is 100 m 2 , the content of organic matter in the sediment is greater than or equal to 5%. Select the water area in the target water area as 5m 2 1 sub-water area, the water area is 20m 2 There is one sub-water area, and the two sub-water areas are not adjacent to each other. Plaque intervention is carried out on the two sub-water areas. In mid-February, bleaching powder is evenly sprinkled in the sub-water areas, and the dosage is 0.5~2g / m 2 , splashed twice in total, with a time interval of 7 days. The splashing was completed at the end of February, and at the end of March, a cotton medicine bag for promoting the root system of submerged plants was hung at 50 cm above the bottom mud of the water body...

Embodiment 3

[0025] On the edge of a small lake near Wuxi, select a water area (about 250 square meters) where a single dominant submerged plant (Spirulina chinensis) is distributed, and arrange 5 groups of enclosures (each enclosure area is 10 square meters), and one group is no treatment One group is the quicklime treatment group, one group is the potassium naphthalene acetate treatment group, one group is the quicklime group after the potassium naphthalene acetate treatment, and the potassium naphthalene acetate treatment group is the first use of the quick lime treatment group. Experiments started in February 2017. The amount of experimental medicine and the method of use are the same as in Example 1. At the end of the experiment in April, we weighed the biomass of S. chinensis treated in each group, and observed the root growth.

[0026] The results showed that, compared with the control group, the relative growth rate of S. chinensis increased by 6% after quicklime treatment, and th...

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Abstract

The invention provides a method for maintaining the stability of a submerged plant community in a lake ecosystem. The method comprises the following four steps of selecting a target water area, conducting block division on the target water area, improving an ecological environment for submerged plants and promoting rooting of the submerged plants. By means of the method, according to practical problems in restoration of the lake ecosystem, the purpose of maintaining the stability of the submerged plant community is achieved through block intervention on a covering area of the submerged plantsin a lake. The method has the advantages of safety, a low cost and the like.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for maintaining a stable submerged plant community in a lake ecosystem. Background technique [0002] The restoration of submerged vegetation is the core link of ecosystem restoration, and it is also the key to realize the transition from turbid water to clear water. The ecological mechanism of submerged vegetation mainly includes: (1) Competing with algae for available nutrients, reducing algae biological (2) increase the sedimentation of particles and inhibit sediment resuspension; (3) provide a place for growth and reproduction of zooplankton and create conditions for them to avoid fish predation; (4) release oxygen to sediments through roots to improve sedimentation redox potential, inhibiting the release of phosphorus from sediments, and so on. The practice of ecosystem restoration shows that the clear water system can only be stabilized after the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G9/02A01G31/02A01G7/06A01N37/10A01P21/00
CPCA01G7/06A01G9/02A01G31/02A01N37/10Y02P60/21
Inventor 李宽意利翔燕黄晓峰钱仁勇
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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