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Device for in-situ study of wetland rhizosphere effect

A kind of effect and wetland technology, applied in the field of devices for in situ research on wetland rhizosphere effects, can solve problems such as the difficulty in fully revealing ecological dynamic processes, the inability to accurately simulate the impact of global changes, and the inability to effectively reflect rhizosphere effects. The effect of scientific research application value, easy promotion and use, and simple structure

Pending Publication Date: 2020-12-01
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the fact that the flat land is not suitable for plant growth and the soil substrate and the soil in the vegetation area are very different, this type of research cannot effectively reflect the influence of the rhizosphere effect; and in the pot experiment, setting up contrast experiments with or without root growth will inevitably change the original wetland. properties such as hydrological connectivity
These limitations have resulted in limited cognition of soil carbon, nitrogen, phosphorus and other biogeochemical cycles driven by microorganisms under the rhizosphere effect. It is difficult to fully reveal the ecological dynamic process between wetland soil microorganisms, plants and the environment. The impact of global change on wetland biogeochemical cycles cannot be modeled accurately

Method used

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  • Device for in-situ study of wetland rhizosphere effect
  • Device for in-situ study of wetland rhizosphere effect
  • Device for in-situ study of wetland rhizosphere effect

Examples

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Effect test

Embodiment 1

[0062] A device for in-situ research on wetland rhizosphere effects. The main body is a long PVC pipe 3 made of PVC, with a diameter of 20 cm and a height of 90 cm:

[0063] The PVC long pipe is equipped with a top cover 2 at the top, and a plurality of top cover perforations 1 with the same aperture are evenly opened on the top cover, and the aperture is 0.2cm; the bottom end is equipped with a bottom cover 7; the top cover 2 and The bottom cover 7 is made of PVC, with a diameter of 21cm and a height of 2.5cm;

[0064] In the long PVC pipe, a drainage hole 4 is provided on the upper part of the pipe wall, and the aperture is 0.5 cm; the drainage hole is equipped with a rubber plug 5; Pipe wall perforation 6, aperture is 3cm; The total area of ​​pipe wall perforation is greater than 20% of the pipe wall area of ​​PVC long pipe buried in the soil;

[0065] The long PVC pipe is set in the soil, wherein the upper part is exposed to the surface, the drainage hole 4 needs to be lo...

Embodiment 2

[0068] A kind of method utilizing embodiment 1 device to carry out in-situ research wetland rhizosphere effect, comprises the following steps:

[0069] (1) Plot establishment: Long-term field monitoring quadrats were set up in the coastal salt marsh wetland of the Yangtze River Estuary. The dominant species of vegetation in the plot were Gramineae and Spartina alterniflora, a perennial herb of the genus Spartina alterniflora, with a quadrat size of 2m. ×2m; Select two sample points with flat land and good Spartina growth in the quadrat;

[0070] (2) Soil treatment: Remove the stems and leaves of Spartina grass at the selected sampling point, and dig out two soil columns with a diameter of 20 cm and a depth of 50 cm with a small ground drilling machine. One of the soil columns is divided into two layers according to 0-20cm and 20-50cm, and passed through a 2mm sieve to remove plant roots, litter residues and soil animals; the other soil column layer remains intact;

[0071] (3...

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Abstract

The invention discloses a device for in-situ study of wetland rhizosphere effect. A main body of the device is a PVC long pipe, a top cover is arranged at the top end of the device in a matched mode,a plurality of top cover penetrating holes are formed in the top cover, and a bottom cover is arranged at the bottom end of the device in a matched mode; a drain hole is formed in the upper part of the pipe wall and is provided with a rubber plug; a plurality of pipe wall through holes are formed in the lower part of the pipe wall; the PVC long pipe is arranged in soil, the upper part is exposed out of the ground surface, and the lower part is buried in underground soil; the two PVC long pipes are arranged in a combined mode, wherein the portion, provided with the pipe wall penetrating holes,of one PVC long pipe is wrapped by a wrapping layer for preventing plant root systems from penetrating through and permeating water and used for measuring the rhizosphere effect, and the other PVC long pipe is not provided with a wrapping layer and used for measuring the non-rhizosphere effect. The device is simple in structure, low in cost and wide in applicability, can be directly used for fieldin-situ detection, and can also be matched with other field instruments and equipment for long-term monitoring; and a stable in-situ environment can be maintained, so that the influence of manual operation on a microbial experiment result is reduced.

Description

technical field [0001] The invention relates to a device for in-situ research on the rhizosphere effect of wetland, in particular to a device capable of directly and effectively conducting research on the rhizosphere effect of wetland soil, and belongs to the technical field of long-term positioning and monitoring in the field of ecology. Background technique [0002] The rhizosphere soil is one of the most active spatial regions in the ecosystem. Under the comprehensive action of plants, soil, water, atmosphere, and microorganisms, the rhizosphere zone forms a unique physical and chemical rhizosphere environment and biological flora, and subsequently A series of cascading effects of soil biochemical processes lead to rhizosphere soil physical and chemical properties and biological characteristics are different from non-rhizosphere soil, that is, rhizosphere effects (rhizosphere effects). The rhizosphere soil is also the most important carbon pool on the earth's surface. Fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01N33/00
CPCG01N33/24G01N33/0098
Inventor 张研黎锦涛周晨昊李颂硕刘浩聂明
Owner FUDAN UNIV
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