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Comprehensive technical scheme for regulating submerged plant communities by utilizing herbivorous fish

A technology of submerged plants and technical solutions, applied in the field of ecological restoration of water bodies, can solve problems such as insufficient fish stocking amount, no proportion and interval planting, and unreasonable stocking timing, so as to reduce management costs and increase economic income.

Active Publication Date: 2017-08-11
广州贝山水生态科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because the submerged plants are not planted in a suitable proportion and interval, the amount of fish stocking is not suitable enough, and the timing of stocking is not reasonable.

Method used

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  • Comprehensive technical scheme for regulating submerged plant communities by utilizing herbivorous fish
  • Comprehensive technical scheme for regulating submerged plant communities by utilizing herbivorous fish
  • Comprehensive technical scheme for regulating submerged plant communities by utilizing herbivorous fish

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Algae-type lakes have turbid water and low transparency. Although exogenous pollution has been cut off and endogenous pollution has been controlled, it is still difficult for submerged plants to recover. For algae-type eutrophic lakes that have cut off exogenous pollution and controlled endogenous pollution, implement the following steps:

[0031]In Yanglan Lake, Ezhou, Hubei, selected the canopy-type pioneer submerged plants Hydra verticillium and hornwort, and the meadow-type submerged submerged plant C. The ratio of planting area of ​​submerged plants for building groups is 1:2. In May 2015, pioneer submerged plants and submerged plants for building groups were planted at intervals of 2 meters, with a total planting area of ​​3000m 2 , the planting density is 600g / m 2 , the average water depth is 1.5 meters, and the initial transparency is 60cm;

[0032] When the transparency reaches an average of 1.2 meters (when the ratio of water depth reaches 0.8), after invest...

Embodiment 2

[0040] In shallow lakes with eutrophication, we choose Trichosanthes spicaculata and Pleurotus spp. as the pioneer submerged plants, and Erythrina chinensis and S. microdentata as submerged plants for building groups. According to the planting area of ​​pioneer plants and building groups The proportion is 1:1. In May 2010, pioneer plants and colony plants were planted at intervals of 1 meter, and the area was separated from other submerged plant areas with fences. The average water depth of the restoration area was 1.4 meters, and the initial transparency 0.7 meters, submerged plants planting density 500g / m 2 .

[0041] When the transparency reached an average of 1.2 meters, the survey found that the biomass density of canopy-type pioneer submerged plants was 3800g / m 2 , distribution area 2000m 2 ; At this time, the average height of the meadow-type submerged plants in the whole restoration area is 70cm;

[0042] According to the highly consistent control principle of pione...

Embodiment 3

[0051] 600m in a community in Shanghai 2 In the river channel, we chose Trichophyllum versicolor and Hornwort as the pioneer submerged plants, and Erythrina miltiorrhiza and Ranunculus as the submerged plants for building groups. According to the ratio of the planting area of ​​pioneer plants and building groups of 1:1.5, in 2014 In June 2019, pioneer plants and colony plants were planted at intervals of 2 meters. The average water depth in this area was 1 meter, the initial transparency was 50 cm, and the planting density of submerged plants was 800 g / m 2 .

[0052] When the transparency reached an average of 80cm, the survey found that the biomass density of canopy-type pioneer submerged plants was 3800g / m 2 ; At this time, the average height of the meadow-type submerged plants in the whole restoration area is 80cm;

[0053] According to the highly consistent control principle of pioneer submerged plants and meadow-type submerged plants, the biomass of pioneer submerged pl...

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Abstract

The invention relates to a comprehensive technical scheme for regulating submerged plant communities by utilizing herbivorous fish. The comprehensive technical scheme comprises the following steps: (1) selecting pioneer submerged plants and colonized submerged plants, and alternately planting; (2) calculating total biomass of to-be-cleared pioneer plant when the ratio of transparence to water depth is more than or equal to 0.8, stocking a corresponding number of grass carp according to the fact that each kilogram of grass carp is used for clearing away 600g of submerged plants every day; (3) clearing away grass carp when the height of pioneer submerged plants is accordant to that of the colonized submerged plants; (4) calculating the biomass of the to-be-controlled submerged plants when the height of to-be-colonized submerged plants exceeds the requirement, and stocking a corresponding number of megalobrama amblycephala according to the fact that each kilogram of megalobrama amblycephala is used for clearing away 400g of submerged plants every-day; and (5) clearing away megalobrama amblycephala when the height of the colonized submerged plants is controlled to 50-80 percent of the original height. The method is favorable to establishing and managing water-quality improvement and optimized landscape effect-based submerged plants in a small shallow lake, so that the water quality and landscape effect are ensured to keep an excellent state for a long time.

Description

technical field [0001] The invention belongs to the technical field of water body ecological restoration, and in particular relates to a comprehensive technical scheme for regulating submerged plant communities by using herbivorous fish. Background technique [0002] With social and economic development and global changes, the eutrophication of lakes is becoming more and more serious. In my country, 80% of shallow lakes are already in a state of eutrophication, and many small shallow lakes are in a steady state of "algal turbidity". It is difficult for general water treatment methods to break this steady state. Only by restoring submerged plants can the "algae turbidity" Turbidity-type water bodies have changed to "clear water-type" water bodies and have been maintained for a long time. Submerged plants are important primary producers in shallow lakes. By absorbing nutrients in the water, promoting nutrient sedimentation, and inhibiting the release of nutrients from sediment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCC02F3/327Y02W10/10
Inventor 何小林关保华甄伟刘正文赵雪枫殷春雨莫家勇杨小琴谢丽莹
Owner 广州贝山水生态科技有限公司
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