Method for recovering slightly degraded Calamagrostis angustifolia wetland by using farmland backwater

A wetland and leaflet technology, applied in fertilization methods, botanical equipment and methods, agriculture, etc., can solve the problems of lack of vegetation restoration techniques and methods, single and extensive technical means, and poor restoration effects, so as to improve the regional ecological environment, The effect of protecting species diversity and increasing dominance

Active Publication Date: 2019-05-07
HEILONGJIANG ACAD OF SCI INST OF NATURAL RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the restoration of wetlands in Northeast China is mainly based on water replenishment, and the technical means are single and extensive, with poor pertinence and poor restoration effect
There is a lack of targeted wetland vegetation restoration methods based on the characteristics of different wetland vegetation types and combined with the key factors of degraded wetland restoration
Especially the Xiaoyezhang wetland, as one of the most representative wetland types in Northeast China, still lacks mature and applicable vegetation restoration techniques and methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for recovering slightly degraded wetlands of P. chinensis by utilizing farmland dewatering, the steps are as follows:

[0016] Step 1: Diagnosis of the degree of degradation of the wetlands of A. microphyllum. The coverage index of the dominant species in the community (Chapteria chinensis) is used to measure the degree of degradation of the wetland. The coverage of the dominant species is 50% to 70% in the wetlands of mildly degraded Cinnamomum palisana, and the coverage of the dominant species in the wetlands of moderate degeneration. In 30% to 50%, the coverage of the dominant species in the heavily degraded wetlands of A. microphyllum was 10% to 30%.

[0017] Step 2: Determine the soil nitrogen limitation factor of the degraded P. baicalensis wetland. The nitrogen limitation factor was measured by soil N:P. The specific operation method is as follows. First, measure the total nitrogen and total phosphorus content of the wetland soil (depth 0 ~ 20cm); seco...

Embodiment 2

[0022] A method for recovering slightly degraded wetlands of P. chinensis by utilizing farmland dewatering, the steps are as follows:

[0023] Step 1: Diagnosis of the degree of degradation of the wetlands of A. microphyllum. The coverage index of the dominant species in the community (Chapteria chinensis) is used to measure the degree of degradation of the wetland. The coverage of the dominant species is 50% to 70% in the wetlands of mildly degraded Cinnamomum palisana, and the coverage of the dominant species in the wetlands of moderate degeneration. In 30% to 50%, the coverage of the dominant species in the heavily degraded wetlands of A. microphyllum was 10% to 30%.

[0024] Step 2: Determine the soil nitrogen limitation factor of the degraded P. baicalensis wetland. The nitrogen limitation factor was measured by soil N:P. The specific operation method is as follows. First, measure the total nitrogen and total phosphorus content of the wetland soil (depth 0 ~ 20cm); seco...

Embodiment 3

[0029] A method for recovering slightly degraded wetlands of P. chinensis by utilizing farmland dewatering, the steps are as follows:

[0030] Step 1: Diagnosis of the degree of degradation of the wetlands of A. microphyllum. The coverage index of the dominant species in the community (Chapteria chinensis) is used to measure the degree of degradation of the wetland. The coverage of the dominant species is 50% to 70% in the wetlands of mildly degraded Cinnamomum palisana, and the coverage of the dominant species in the wetlands of moderate degeneration. In 30% to 50%, the coverage of the dominant species in the heavily degraded wetlands of A. microphyllum was 10% to 30%.

[0031] Step 2: Determine the soil nitrogen limitation factor of the degraded P. baicalensis wetland. The nitrogen limitation factor was measured by soil N:P. The specific operation method is as follows. First, measure the total nitrogen and total phosphorus content of the wetland soil (depth 0 ~ 20cm); seco...

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Abstract

The invention provides a method for recovering a slightly degraded Calamagrostis angustifolia wetland by using farmland backwater. The method comprises the following steps: measuring the degradation degree of the Calamagrostis angustifolia wetland by adopting a coverage index of dominant species of the community, wherein the coverage of the dominant species of the slightly degraded Calamagrostis angustifolia wetland is 50%-70%, the coverage of the dominant species of a moderately degraded Calamagrostis angustifolia wetland is 30%-50%, and the coverage of the dominant species of a severely degraded Calamagrostis angustifolia wetland is 10%-30%; determining the total nitrogen and total phosphorus content of the soil of the Calamagrostis angustifolia wetland; measuring and calculating according to the total nitrogen and total phosphorus contents of the soil, wherein when the ratio of N to P of the soil is less than 14, it shows that the wetland is limited by N and is lack of nitrogen; watering, wherein the watering time is in the middle or last ten days of May and the first or middle ten days of July; irrigating twice, wherein 3-5 tons of water is applied to a land per mu, the type ofirrigation is farmland backwater, irrigation water is pumped in by a water pump, water irrigation is carried out after application of the farmland backwater, and the highest water level cannot exceed10 cm; and carrying out later maintenance management, wherein the farmland backwater can be supplemented with a water source when the amount of the farmland backwater is insufficient.

Description

technical field [0001] The invention relates to a method for recovering slightly degraded wetlands of P. chinensis by utilizing receding water in farmland, and belongs to the technical field of methods for restoring degraded wetlands. Background technique [0002] Wetland is a unique ecosystem formed by the interaction of water and land on the earth. It is the ecological landscape with the richest biodiversity in nature and one of the most important living environments for human beings. It plays an extremely important role in degrading environmental pollution. As one of the areas with the most abundant wetland resources in China, the Northeast region has the characteristics of large area, various types, important locations, and rich biodiversity. It is an important international migration and breeding ground for migratory birds in Northeast Asia. However, due to human activities such as reclamation and drainage, large areas of wetlands in Northeast China have been lost and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G20/00A01C21/00G01N33/24
Inventor 刘赢男曹宏杰王继丰付晓玲徐明怡柴春荣付晓宇倪红伟杨立宾罗春雨
Owner HEILONGJIANG ACAD OF SCI INST OF NATURAL RESOURCES
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