Multi-layer soil water fertilizer migration and transformation parameters testing device and method

A technology of migration, transformation and testing device, applied in soil material testing, measuring devices, instruments, etc., can solve the problem of difficulty in accurately reflecting the movement of water and fertilizer in farmland soil, and achieve the effect of improving utilization efficiency

Inactive Publication Date: 2016-02-17
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing methods mostly study homogeneous soil, and only consider the one-dimensional vertical or horizontal movement of soil water and solute, which is difficult to accurately reflect the movement of soil water and fertilizer in farmland. There will be large errors in the application of experimental results to the study of water and fertilizer movement in farmland. Therefore, there is a need for an inventive method that is more in line with the actual conditions of the farmland

Method used

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  • Multi-layer soil water fertilizer migration and transformation parameters testing device and method
  • Multi-layer soil water fertilizer migration and transformation parameters testing device and method
  • Multi-layer soil water fertilizer migration and transformation parameters testing device and method

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Experimental program
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Embodiment 1

[0033] The present invention will be further described below in conjunction with the accompanying drawings of the description. Such as Figure 1-4 As shown, a multi-layer soil water and fertilizer migration and conversion parameter testing device includes a platform 25, on which a layered soil column 1, a cylindrical plexiglass inner column 2 and a cylindrical plexiglass outer column 3 are arranged sequentially from the inside to the outside, A water supply chamber 13 is arranged under the platform 25, and a vent hole 14 is arranged above the side wall of the water supply chamber 13, and the water supply chamber 13 communicates with an automatic control water supply and drainage device 16 through a water supply pipe 15;

[0034] In the layered soil column 1, from bottom to top, there are subsoil layer 6, plow layer 5, and tillage layer 4. Each layer is respectively equipped with a soil water potential sensor 7, a negative pressure water sampler 8 and a soil moisture content me...

Embodiment 2

[0058] Based on the device and method steps of Embodiment 1, the implementation of the following experiments can be realized:

[0059] Such as Figure 1-4 , the plexiglass inner and outer columns and soil soil columns are set at the same time 4 and connected to the same automatic control water supply and drainage device, and the soil layer conditions, buried instrument conditions, and collection conditions are the same. Simulate the actual field crop planting conditions and plant crops in the plowing layers of the 4 devices. Set two irrigation methods namely F1 and F2, and set two groundwater level control levels Z1 and Z2. Four treatment levels were set in the experiment: F1Z1, F1Z2, F2Z1, F2Z2, and the irrigation system was determined according to the crop growth period. Soil samples of each layer were collected before crop planting, and their corresponding physical and chemical parameters were determined.

[0060] The depth of the water layer of the soil column should no...

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Abstract

The invention relates to a multi-layer soil water fertilizer migration and transformation parameters testing device and a method, which comprises steps: (a) cylindrical organic glass inner and outer columns and layered soil columns are made, plum blossom-shaped holes are distributed on a specify height in organic glass, and soil columns are packed by cylindrical organic glass inner columns, and are divided into plough layers, plowing layers and bottom soil layers; (b) soil water potential sensors, negative pressure water-taking samplers and soil water content measurement instruments are respectively embedded in various soil layers; (c) soil water generates lateral seepage water which is discharged into ring-shaped regions between the cylindrical organic glass inner and outer columns through the plum blossom-shaped holes at the same time during the infiltration process, and is extracted into an external device to assay and analyze. The multi-layer soil water fertilizer migration and transformation parameters testing device and the method are used to explore layered soil water fertilizer infiltration and lateral seepage and transformation process thereof, determines drainage contribution rate of vertical seepage and lateral seepage of the layered soil in various conditions, can be provided with different underground water levels, and develops translocation and transformation of soil water fertilizer on various layers and mutual replenishment relationship of soil water and underground water.

Description

technical field [0001] The invention relates to the field of soil water and fertilizer migration, in particular to a multilayer soil water and fertilizer migration and conversion parameter testing device and method. Background technique [0002] Soil water movement and solute transport are the basis for studying the transfer and utilization efficiency of farmland water and fertilizer. At present, the research on soil water movement and solute transport is mainly carried out through field test monitoring research and indoor device simulation monitoring research. Field monitoring has It is helpful to understand the movement of water and fertilizer in farmland under actual water management measures. However, the research method of field monitoring has a long test cycle, and the test conditions are difficult to control and reproduce. Moreover, field monitoring research is regionally specific, and the monitoring results should not be applied to other regions. [0003] According t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
CPCG01N33/24G01N2033/245
Inventor 邵东国徐保利杨霞陈述乐志华
Owner WUHAN UNIV
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