Plant root pressure and transpiration pull tester and testing method thereof

A technology of tension measurement and plant root, applied in the direction of instruments, analysis materials, etc., to achieve the effect of simple operation, field measurement and simple structure

Pending Publication Date: 2017-03-08
GANSU AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And there is no convenience in the prior art, sensitive measuring instrument

Method used

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  • Plant root pressure and transpiration pull tester and testing method thereof
  • Plant root pressure and transpiration pull tester and testing method thereof
  • Plant root pressure and transpiration pull tester and testing method thereof

Examples

Experimental program
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Embodiment 1

[0042] The present embodiment provides plant root pressure and transpiration tension measuring instrument, such as figure 1 As shown, it includes: a fixing mechanism and a measuring device, and the fixing mechanism includes: a measuring platform 9, a stem holder 7, a level 10; the measuring device includes: a glass tube 12, a valve 1, a valve 2, a valve 3, and a valve 4. Water storage tank 5, thermometer 8, rubber tube 11, rubber sleeve 6. Stem fixer 7, spirit level 10 and measuring device are all placed on the measuring platform; Rubber sleeve 6, valve 3, rubber tube 11, valve 4, water storage tank 5, valve 1, glass tube 12, valve 2 are connected successively.

[0043] Further, there is a uniform scale on the glass tube 12, which can read the volume of the gas. The inner diameter of the glass tube 12 can make water form a water column in the glass tube 12 according to the surface tension of the water. The calculated inner diameter is 0.1-50mm. should.

[0044]Further, the m...

Embodiment 2

[0053] The present embodiment provides plant root pressure and transpiration pull measuring method, such as Figure 4 with 5 shown, including the following steps:

[0054] (1) Experiment preparation: Take the above-mentioned plant root pressure and transpiration tension measurement system to the greenhouse or field, and adjust the height of the measuring platform 9 to be equivalent to the section of the stem to be cut.

[0055] (2) Glass tube water injection: hold one end of the glass tube valve 2, make the glass tube 9 vertical, tie the rubber sheath 6 with a string, connect the valve 3 with a syringe, open the valve 2, and fill the glass tube 9 with water until The water surface rises to the glass tube 2 / 3 and stops, and the valve 2 is closed at the same time.

[0056] (3) Connect the section of the plant stem: Gently cut off the stem of the plant to be tested to make the section flat, put the rubber sleeve 6 on the section, and wrap it with a parafilm for several weeks to...

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Abstract

The invention provides a plant root pressure and transpiration pull tester and a testing method thereof. A glass tube capable of being sealed is adopted; a segment of air is sealed up by water; the other end of the glass tube is connected with a section of a plant stem; a plant transpires and absorbs, then the volume of air in the glass tube is increased and the pressure is reduced, or the plant is subjected to bleeding sap under the action of a root pressure, then the volume of the air in the tube is reduced and the pressure is increased; then according to an ideal gas equation (Clapyron equation), transpiration pull or the root pressure is calculated out. The plant root pressure and transpiration pull tester provided by the invention is simple in structure, has low manufacturing cost, and is simple to operate; the root pressure and the transpiration pressure of the same plant can be simultaneously measured by adopting two sets of devices, so as to calculate out total water absorption power of the plant; moreover, a measurement system can also implement field measurement.

Description

technical field [0001] The invention relates to a plant physiology experiment device, in particular to a plant root pressure and transpiration tension measuring device and a measuring method thereof. Background technique [0002] Transpiration is the process in which water is lost from the surface of plants (mainly leaves) to the atmosphere in the form of water vapor; unlike the evaporation process in physics, transpiration is not only affected by external environmental conditions, but also regulated by the plant itself and control, so it is a complex physiological process. The physiological significance of transpiration has the following three points: 1. Transpiration is a major driving force for plants to absorb and transport water, that is, transpiration pull. 2. Since mineral salts must be dissolved in water to be absorbed by plants and operate in the body, transpiration is the driving force for water absorption and flow, therefore, minerals are also inhaled and distr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/04G01N7/14
CPCG01N7/04G01N7/14
Inventor 唐勋司怀军张宁
Owner GANSU AGRI UNIV
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