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Measuring method and device for hydraulic conductivity and inherent hydraulic conductivity of plant leaves based on physiological resistance

A technology of plant leaves and measurement methods, which is applied in the field of agricultural engineering and crop information detection, can solve the problems of poor repeatability and non-comparability of results, and achieve the effects of high precision, reduced edge effects, and simplified structure

Inactive Publication Date: 2018-09-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of measuring method and device of plant blade hydraulic conductivity and inherent hydraulic conductivity based on physiological resistance, to overcome the defects of poor repeatability and non-comparability of results in the prior art

Method used

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  • Measuring method and device for hydraulic conductivity and inherent hydraulic conductivity of plant leaves based on physiological resistance
  • Measuring method and device for hydraulic conductivity and inherent hydraulic conductivity of plant leaves based on physiological resistance
  • Measuring method and device for hydraulic conductivity and inherent hydraulic conductivity of plant leaves based on physiological resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Embodiment 1: Take building a tree as an example. The fresh branches of the mulberry tree with leaves in different growth environments with relatively consistent growth were picked on the campus of Jiangsu University for measurement, and the inherent water conductivity of the leaves of the mulberry tree and the water conductance of the leaves when the angle between the leaves and the ground is 30° were quickly detected. Spend.

[0070] Step 1, connecting the measuring device with the LCR tester;

[0071] Step 2, select the fresh branches of the mulberry tree with leaves growing on the waterside and in the soil, and wrap the base of the branches with wet cotton to slow down the water loss;

[0072]Step 3, quickly return to the laboratory, after cleaning the dust on the surface of the leaves on the fresh branches, pick leaves that are more consistent in growth on the fresh branches;

[0073] Step 4: Clamp the blade between parallel plates, set the measurement voltage to...

Embodiment 2

[0085] Embodiment 2: taking mulberry as an example, the fresh branches of mulberry with leaves are measured under the relatively consistent different growth environments of the Jiangsu University campus, and the inherent hydraulic conductivity of the mulberry leaves is quickly detected and the angle between the leaves and the ground is Blade conductance at 30°. All steps are with embodiment 1.

[0086] Setting measuring voltage 1.5 volts, measuring frequency is 3000Hz, the mulberry leaf physiological resistance of measuring under different clamping force, as shown in table 3. The coupling model of physiological resistance and clamping force change of mulberry leaves derived based on the Nernst equation and various parameters are shown in Table 4; the water conductance and intrinsic water conductance of mulberry leaves based on physiological resistance calculated according to the parameters of the equation are as follows: table 5. Comparing the economics of water transport in...

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Abstract

The invention discloses a measuring method and device for hydraulic conductivity and inherent hydraulic conductivity of plant leaves based on physiological resistance. The measuring device comprises asupport, foam plates, plate electrodes, wires, iron blocks and a plastic bar, wherein the foam plates embedded with the plate electrodes separately adhere to the bottom end of the support and the plastic bar; the plastic bar is added with the iron blocks in different weights to change the pressure of the device so as to adjust clamping force; when the device is used, the plate electrodes are connected with an LCR testing instrument through the wires; the two plate electrodes clamp a plant leaf to be measured; different clamping forces are set to measure the physiological resistance of the plant leaf; a coupling model of the physiological resistance of the plant leaf under different clamping forces is established on the basis of a Nernst equation, and a model equation is derived to obtainhydraulic conductivity and inherent hydraulic conductivity of the plant leaf based on the physiological resistance; and then the economy of water for plants is judged. The hydraulic conductivity and inherent hydraulic conductivity of plant leaves can be detected conveniently, rapidly and quantitatively, economy of water conduction of plants is judged quantitatively, and a measuring result has comparability.

Description

technical field [0001] The invention belongs to the technical field of agricultural engineering and crop information detection, in particular to a method and device for measuring the water conductance of plant leaves and inherent water conductance based on physiological resistance, which can quickly and quantitatively detect the water conductance of plant leaves based on physiological resistance degree and inherent hydraulic conductivity to judge the economy of plant water transport. Background technique [0002] The cell membrane is mainly composed of lipids (mainly phospholipids), proteins and carbohydrates; among them, proteins and lipids are the main ones. Phospholipid bilayers are the basic scaffolding of cell membranes. Under the electron microscope, it can be divided into three layers, that is, there is an electron-dense belt with a thickness of about 2.5nm on the inner and outer sides of the film, and a transparent belt with a thickness of 2.5nm in the middle. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04G01N33/00
CPCG01N27/041G01N33/0098
Inventor 吴沿友黎明鸿邢德科刘宇婧姚香平于睿徐小健毛罕平
Owner JIANGSU UNIV
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