Method for measuring stress state of plant water

A measurement method and plant water technology, which are applied in the field of measurement of plant water stress conditions, can solve the problems of large operation difficulty factor, increase system error, complicated process, etc., and achieve small measurement error, simple operation process, and low operation difficulty factor. Effect

Inactive Publication Date: 2011-08-17
CHINA AGRI UNIV
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Problems solved by technology

The process of this method is complicated, the operation difficulty coefficient is high, and the plant morphological features are not directly extracted, but the water content of plants is predicted by image feature recognition, which increases the system error

Method used

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  • Method for measuring stress state of plant water
  • Method for measuring stress state of plant water
  • Method for measuring stress state of plant water

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Embodiment Construction

[0030] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] The measuring device used in the present invention is a laser scanner in a patent application whose application number is 200810119231.9 and the title of the invention is "a method for measuring soil porosity". In the actual measurement process, the following steps are included:

[0032] 1: Move and adjust the laser scanner so that the x and y axis planes remain horizontal;

[0033] 2: Determine the scanning range above the plant to be measured according to its specific position, construct an xy plane rectangular coordinate system, and use the laser oblique height sensor to scan to obtain the height value d of the sampling points within this range xy ;

[0034] 3:...

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Abstract

The invention discloses a method for measuring the stress state of plant water, which comprises the following steps: S1: determinating the scanned range and the sampling point of the plant to be measured and constructing an x y rectangular coordinate system within the determinated scanned range; S2: acquiring a height value d x y of the sampling point in the scanned range; S3: setting a height threshold D, combing the height value d x y of the sampling point, and extracting the sampling point positioned on the leaf of the plant to be measured; S4: reconstructing a three-dimensional space shape and calculating the three parameters of the average height h0 of the leaf, the inclination angle Alpha of the leaf and the area of the leaf s0 on the basis of combing the x y coordinate system constructed in the S1 and the height value of the extracted sampling point positioned on the leaf of the plant in the S3; and S5: according to the three parameters of the average height h0 of the leaf, theinclination angle Alpha of the leaf and the area of the leaf s0, and floristics to be measured, judging the water loss of the current plant. The invention can directly measure plant morphological characteristics, and has simple operation process, low degree of operation difficulty and the effect of small measurement error.

Description

technical field [0001] The invention relates to a method for measuring the water stress state of plants, in particular to a method for measuring and studying the water stress state of plants by using a laser oblique height sensor. Background technique [0002] Water stress refers to the decrease of water content and turgor pressure of plant tissues due to the water loss of plants exceeding water absorption, and the normal physiological functions are disturbed. my country is a large agricultural country with very scarce water resources per capita. The phenomenon of crops suffering from water stress is common. According to statistics, the stunting of plant growth and the reduction of crop yield caused by it exceed the sum of all other stresses. In order to make reasonable and effective use of limited water resources and vigorously develop water-saving irrigation, on-demand irrigation has become an important breakthrough in the current agricultural production and even the devel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/00G01B11/02G01B11/00G01B11/28
Inventor 孙宇瑞林剑辉蔡祥王聪颖孟繁佳张慧娟
Owner CHINA AGRI UNIV
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