Soil water potential quick-test instrument and test method thereof

A soil water potential and speed measuring instrument technology, applied in the direction of instruments and analytical materials, can solve problems such as shortening the time for measuring soil water potential, and achieve the effects of shortening the measuring time, shortening the equilibration time, and improving work efficiency

Inactive Publication Date: 2011-09-14
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical problem solved by [0003]: the present invention aims at the defect of using tensiometer to measure soil water potential at present, and provides a kind of soil water potential rapid measuring instrument and its method for measuring soil water potential, The soil water potential rapid measuring instrument can quickly measure the soil water potential and shorten the time of using the original tensiometer to measure the soil water potential

Method used

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  • Soil water potential quick-test instrument and test method thereof
  • Soil water potential quick-test instrument and test method thereof
  • Soil water potential quick-test instrument and test method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A kind of soil water potential quick-measuring instrument, comprises data acquisition device and display, wherein data acquisition device comprises pressure sensor 9, gas collection chamber 3 and water potential probe, and described gas collection chamber is connected with water potential probe sealingly by connecting pipe, and pressure sensor is located at On the gas collection chamber, the pressure sensor is connected to the display through a data cable. The water potential probe is a pottery head 1, the gap is less than 2.8 microns, the air leakage value is greater than 1 bar, and the water permeability is 0.8 ml / bar·min·cm 2 . The gas collection chamber includes a gas collection pipe, one end of the gas collection pipe is provided with a piston valve, and the piston valve is sealed with the gas collection pipe. The piston valve is a screw piston 7, and the head of the screw piston is provided with a syringe tip 18; the pipe body at the connecting end of the air col...

Embodiment 2

[0028] As described in the embodiment of the soil water potential rapid measuring instrument, its data acquisition device also includes a temperature sensor, and the temperature sensor is connected to the display through a data line.

Embodiment 3

[0030] Instrument structure:

[0031] The soil water potential speed measuring instrument is composed of clay head, display, pressure sensor, gas collection chamber, exhaust port bolt, connecting pipe, screw piston and other components ( figure 1 )

[0032] The upper end of the gas collecting pipe is a water injection port, which can be closed by screwing on a screw piston. There is an interface on the side of the gas collecting pipe to connect with the pressure sensor, and an outlet on the other side. Tighten the O-shaped rubber ring of the exhaust port to close the exhaust port. The lower end of the air collecting pipe is connected with the clay head through a connecting pipe. The pressure sensor is connected to the display through a four-core cable.

[0033] 1. Clay head: Clay head is a kind of porous plain fired pottery, its pores are less than 2.8 microns; the air leakage value is greater than 1 bar; the water permeability is about 0.8 ml / bar·min·cm 2 .

[0034] 2. ...

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Abstract

The invention discloses a soil water potential quick-test instrument and a test method thereof. The quick-test instrument comprises a data acquisition device and a displayer, wherein the data acquisition device comprises a pressure sensor, a collection chamber and a water potential probe, the collection chamber is in a sealing connection with the water potential probe through a connection pipe, the pressure sensor is arranged on the collection chamber, and the pressure sensor is connected with the displayer via a data line. The soil water potential quick-test instrument provided by the invention can quickly test the soil water potential, thereby shortening the test time and improving the work efficiency. In the test process, other soil environment data also can be gathered.

Description

technical field [0001] The invention belongs to the technical field of soil water potential measurement, in particular to a soil water potential rapid measuring instrument and a method for measuring soil water potential. Background technique [0002] Soil water potential is the main indicator of whether a crop needs to be irrigated. The tensiometer uses a negative pressure meter to measure soil moisture. It is a tool for studying soil moisture movement from an energy perspective. It has the advantages of simple structure, high sensitivity, and easy use. It can position and continuously measure the dynamic change of soil water potential. However, the disadvantage of the tensiometer is that after the instrument is buried in the soil, the soil water potential parameters need to be obtained after the hydraulic balance between the instrument and the soil is reached, and this equilibrium time often takes several hours. Therefore, it is difficult to quickly measure the soil wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/00
Inventor 徐富安
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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