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Method for preparing macrotype undisturbed soil pole and uses thereof

An undisturbed soil column, large-scale technology, applied in the field of preparation of original soil column system, can solve the problems of high cost, easy rust and influence of titanium alloy, and achieve the effect of low construction cost, low material cost and simple operation.

Inactive Publication Date: 2008-09-03
HUAZHONG AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And there are many disadvantages, such as the use of ordinary steel as a material is easy to rust, heavy metals on stainless steel have affected research on heavy metals, the cost of titanium alloys is too high, and in most cases there is no effective way to prevent the edge flow of water

Method used

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  • Method for preparing macrotype undisturbed soil pole and uses thereof
  • Method for preparing macrotype undisturbed soil pole and uses thereof
  • Method for preparing macrotype undisturbed soil pole and uses thereof

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Embodiment Construction

[0012] refer to figure 1 , PVC pipe 2 with an inner diameter of 610±2mm and an outer diameter of 630±2mm, cut into a height of 700±5mm, the cutting edge 1 of the lower part is 10±1mm in height, and the inclination angle α=75°±5°, the cutting edge is used as the cutting edge of the soil use.

[0013] When preparing a large-scale undisturbed soil column, select a field that has been cultivated for many years and the soil is mature and undisturbed, place the PVC pipe 2 vertically on the surface, and dig a round hole with a width of 90±2cm and a depth of 120±5cm around the PVC pipe 2 , make the PVC pipe 2 stand on the soil body with a diameter of about 90±5cm. Then place the sleepers about 1±0.1m long on the PVC pipe 2 horizontally, and tap the sleepers with a mallet to make the PVC pipe 2 drop evenly. For every drop of 2 cm, use a shovel to separate the original soil column 6 from the PVC pipe 2. Flatten the edges to prevent soil shedding. Then continue to knock with a mallet ...

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Abstract

The invention relates to a preparation method for establishing large original soil column system using PVC material and application. The main object of the invention is to research the influence of the water leach and solute in water to ground water in soil-plant system. The PVC pipe is laid on the land surface and knocked, therefore the original soil enters into the PVC pipe and cut down at the bottom of the PVC pipe. At test site, the original soil and PVC pipe are put into the PVC base together, and the bottom of the PVC base is laid with infiltration material and provided with infiltration hole and connected with a collection vessel by silicone tube. A passage is set in the middle of the test site, and original soil columns are disposed in interval at the two sides of the passage wherein the original soil columns are paralleled with the ground and the soil back fills around the column. Finally plants are planted on the original soil column and the infiltration liquid is collected to research the change situation of the solute in soil leaching water. The construction cost and the material cost is low and the operation is simple and convenient, capable of satisfying the test requirement of the agroecosystem.

Description

technical field [0001] The invention relates to a preparation method and application of an original soil column system for studying water loss in a soil-plant system and its influence on groundwater. Background technique [0002] There are three methods for studying soil leachate at home and abroad. One is to establish a percolation sampling system, directly bury the solution collection tray and vacuum sampler in the soil, and extract the soil solution. This method destroys the soil profile, and the amount of leachate extracted is smaller than the actual situation in the field, and a larger vacuum pump is used to extract the leachate, which requires higher equipment. The second is to establish a backfill soil column system. According to different soil layers, the soil is backfilled into circular or square containers, and a percolation layer is laid at the bottom and a leachate receiving device is installed to receive leachate. Although this method is simple, the soil profil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
Inventor 赵长盛胡承孝黄魏
Owner HUAZHONG AGRI UNIV
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