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Regulating and controlling method for bogginess of grass type shallow lake based on synergic decomposing effect of plant residues

A plant residue and swamp technology, applied in the field of environmental ecology, can solve the problems of increasing stem density, unfavorable large-scale promotion, and high economic costs, so as to curb the aggravation of swamps, inhibit the accumulation of plant residues, and reduce economic costs. low effect

Inactive Publication Date: 2012-06-27
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the current research results, mechanized harvesting of submerged plants can limit the accumulation and release of endogenous nutrient loads in lakes, reduce secondary pollution, inhibit biofilling, and prevent swamps. In the case of the large emergent Phragmites reeds, harvesting increased stem density and long-term control of Phragmites was not achieved with harvesting or herbicides alone
The method of artificially isolating water areas can significantly improve the water quality in swamp areas, but it does not fundamentally solve the problem of the spread of large aquatic vascular plants, and this method has high economic costs, which is not conducive to large-scale promotion

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0006] Principle and implementation mode of the present invention are described in detail below:

[0007] Principle of the present invention: there is a synergistic effect in the decomposition process of aquatic plant residues. According to a certain biomass ratio, the plant configuration aimed at maximizing the synergistic decomposition rate in the swampy area can effectively inhibit the accumulation of aquatic vascular plant residues and curb the aggravation of the swampy degree of grass-type lakes.

Embodiment 1

[0010] In a certain section of the Haihe River Basin in the North China Plain, the main aquatic plants include reeds, lotuses, and spinach. The water body in this area has slow water flow and poor exchange capacity with the outside world. After the death of aquatic plants, the decomposition speed of the residues is extremely slow, and the degree of swamping is reflected in the strong biological filling effect. Divide the target area into a control area and a proportional allocation area. In the proportional allocation area, according to the ratio of biomass 3:1:1, plant lotus, reed, and ricinus in the target area. The swamp control effect is shown in Table 1. Shown:

[0011] Table 1 Comparison of swamp regulation effects

[0012] Decomposition rate / annual deposit thickness

Embodiment 2

[0014] In a certain section of the Nansi Lake Basin, due to the massive discharge of domestic sewage and agricultural surface runoff, the N and P in the water body seriously exceeded the standard, which in turn led to the vigorous growth of emergent plants lotus and cattail, submerged plants hornwort and ricin. When the ratio of the biomass of the four plants is 3:1:0.5:0.5, the synergistic decomposition effect is the largest, and plants are planted in the target area according to this ratio, and the effect is shown in Table 2:

[0015] Table 2 Comparison of swamp regulation effects

[0016] Decomposition rate / annual deposit thickness

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Abstract

The invention aims at bogginess caused by the small decomposing rate and the strong biological filling action of plant residues in a grass type shallow lake and provides a regulating and controlling method for bogginess based on a synergic decomposing effect between aquatic plant residues. Firstly, main dominant plants triggering the quick bogginess of a grass type lake and the silt decomposing capability thereof are determined in a target area, and the biomass proportion of different plants under the condition of maximizing the synergic decomposing effect is obtained by test. The biomass proportion is used as a basis in the target area, and a traditional plant situation in a boggy area is changed, so that the decomposition of the residues of dominant bog plants in water is quickened, the biological accumulating and filling action of the residues of the dominant bog plants is suppressed, and the trend of bogginess is delayed. The method is simple and convenient to operate and is economical and feasible, the defects of high cost and low efficiency of the modes of mechanical harvesting, manual dredging and the like are overcome, and the water environment of a lake and the ecological current situation of water can be obviously improved. The method has a certain popularizing and using value.

Description

technical field [0001] The invention relates to the field of environmental ecology, in particular to a grass-type shallow lake swamping control technology based on the synergistic decomposition effect of plant residues. The present invention designs a new mosaic combination mode of plants in lake areas where swamps are more serious by determining the decomposition rates of residues after different plant combinations, and uses the synergistic decomposition effect of plant residues in this mode to curb the trend of swamps. Background technique [0002] At present, Japan, Canada, China and other countries have related patented technologies for the control of shallow lake swamps, among which technical measures such as mechanical harvesting, manual dredging, and enclosure purification are widely used. The new utility patent with the publication number of 201004818Y discloses a hob-type aquatic weed harvester, which has the characteristics of small size, flexible operation, conven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00
Inventor 崔保山韩祯李夏蓝艳王婷婷张永涛
Owner BEIJING NORMAL UNIVERSITY