Plant's water shortage status diagnosis method based on infrared imaging

A diagnostic method and infrared imaging technology, applied in the direction of measuring devices, material analysis through optical means, instruments, etc., can solve the problems of time-consuming and labor-consuming measurement, large errors, and can only be used for scientific research, so as to improve efficiency, Simple operation effect

Inactive Publication Date: 2017-04-05
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

[0003] The traditional indicators for monitoring the water shortage of plants include leaf water potential, leaf stomatal conductance, leaf water content, etc., but these indicators can only be obtained by measuring a single leaf or a single plant, and the measurement is time-consuming and labor-intensive with large errors. In practice, it is difficult to popularize and apply on a large scale, and most of them can only be used for scientific research

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  • Plant's water shortage status diagnosis method based on infrared imaging
  • Plant's water shortage status diagnosis method based on infrared imaging

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specific Embodiment approach

[0010] The method for diagnosing the water shortage condition of plants based on infrared imaging of the present invention, its preferred embodiment is:

[0011] Using the average temperature T of the leaves of the target plant l , reference dry leaf temperature T d and reference wet leaf temperature T w , combined with the blade shape parameter d and the instantaneous wind speed μ at the corresponding measurement time, and the maximum stomatal conductance value g at the current moment smax , to calculate the average stomatal conductance g of the plant leaf s and Water Scarcity Level V.

[0012] The average temperature T of the leaves of the target plant l , dry leaf temperature T d and wet leaf temperature T w Obtained by:

[0013] Use the infrared thermal imaging device to collect images of the target plants, export the temperature data corresponding to the images and remove redundant data, screen the temperature data sets of the plant leaves, and calculate the averag...

specific Embodiment

[0025] Using the leaf temperature T of the target plant l (°C), reference dry leaf temperature T d (°C) and reference wet leaf temperature T w (°C), combined with the blade shape parameters, namely the blade length d (m) and the instantaneous wind speed μ (m / s) at the corresponding measurement time, and the maximum stomatal conductance value g at the current moment smax (mmol m -2 the s -1 ), calculate the average stomatal conductance g of the plant leaf s (mmol m -2 the s -1 ) and water scarcity level V.

[0026]

[0027] Among them, r aW is the evaporation heat diffusion resistance of the boundary layer.

[0028] For ordinary blades, r aW =1 / (6.62(μ / d) 0.5 )

[0029] If it is a cylindrical blade, then r aW =1 / (4.03(μ 0.6 / d 0.4 ))

[0030] If it is a spherical blade, then r aW =1 / (5.77(μ 0.6 / d 0.4 ))

[0031] According to the calculated g s And the maximum stomatal conductance value, judge the plant water shortage status index v, and classify it into ...

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Abstract

The invention discloses a plant's water shortage status diagnosis method based on infrared imaging. The method comprises the following steps: firstly reading a document containing plant-leaf temperature data at the noon, obtaining plant-leaf temperature data Tl by a data screening method, obtaining temperature Td of reference dry leaf and temperature Tw of reference wet leaf according to infrared image temperature data of the reference dry leaf and reference wet leaf, calculating plant's stomatal conductance value gs by combining instantaneous wind speed Mu and leaf average length d, and comparing the calculated value with the maximum stomatal conductance gsmax of each plant at corresponding moment to obtain plant's water shortage status index v so as to further judge plant's water shortage status grade V. In comparison with the prior art, the method of the invention is adopted to evaluate plant's water shortage status by calculating plant's stomatal conductance through an infrared imaging technology, is simple to operate, and is time-saving and labor-saving.

Description

technical field [0001] The invention relates to a plant cultivation technology, in particular to a method for diagnosing the water shortage condition of plants based on infrared imaging. Background technique [0002] In today's severe situation of water shortage, the physiological and ecological response of plants to soil moisture has become an important research topic in vegetation construction, timely and accurately monitor the dynamics of physiological indicators of plants, understand the physiological response of plants to water, and accurately judge plant The living conditions and water shortage conditions have become technical problems that need to be solved urgently in practice. [0003] The traditional indicators for monitoring the water shortage of plants include leaf water potential, leaf stomatal conductance, leaf water content, etc., but these indicators can only be obtained by measuring a single leaf or a single plant, and the measurement is time-consuming and l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3554
CPCG01N21/3554
Inventor 于明含赛克高广磊丁国栋赵媛媛郭米山
Owner BEIJING FORESTRY UNIVERSITY
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