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A handheld device-based method and device for measuring nitrogen content in plant leaves

A technology of plant leaves and handheld devices, which is applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of groundwater pollution, fertilizer utilization rate decline, crop quality reduction, etc., and achieve the effects of portability, simplified measurement steps and equipment, and cost reduction

Active Publication Date: 2018-11-06
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the growth and development of crops, the demand for nitrogen is greater. Nitrogen deficiency will directly affect the growth and yield of crops. However, excessive application of nitrogen fertilizers will cause problems such as reduced fertilizer use efficiency, reduced crop quality, groundwater pollution, and greenhouse gas emissions.

Method used

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  • A handheld device-based method and device for measuring nitrogen content in plant leaves
  • A handheld device-based method and device for measuring nitrogen content in plant leaves
  • A handheld device-based method and device for measuring nitrogen content in plant leaves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1: Device and instructions for use thereof

[0054] Such as figure 1 As shown, a device for measuring the nitrogen content of plant leaves based on a handheld device according to the present invention includes a handheld device (4), a background plate (1) and a calibration color block group (2). The handheld device (4) has the functions of photographing, storing, image processing, statistical analysis, man-machine interaction and display. The color of the front of the background board (1) is different from the color of the measured plant leaves (3), and a calibration color block group (2) is fixed on the front of the background board (1), and the color of each color block is different from that of the background board (1) The front color and the color of the measured plant leaves (3), and the color information is known. When taking photos with the handheld device (4), try to make the lens direction perpendicular to the background plate (1), and the lens is ...

Embodiment 2

[0063] Embodiment two: measuring method

[0064] a. If figure 1 Select a background board (1) with a solid color on the front as shown. The color of the background plate (1) front that adopts in the present embodiment is magenta (R:255, G:0, B:255);

[0065] b. Select a calibration color block group (2), each color block is a solid color, regular in shape, and the color information is determined. In this embodiment, the calibration color block group (2) includes black block (R: 0, G: 0, B: 0), white block (R: 255, G: 255, B: 255), gray color block (R : 120, G: 120, B: 120), standard red block (R: 255, G: 0, B: 0), standard green block (R: 0, G: 255, B: 0) and standard blue block (R: 0, G: 0, B: 255) during use, the calibration color block group (2) is fixed on the front of the background plate (1). In this embodiment, the calibration color block group (2) is pasted on the front of the background board (1);

[0066] c. Lay the leaves of the tested plants (3) flat on the fr...

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Abstract

The invention discloses a measuring method and a measuring device for the nitrogen content of a plant leaf on the basis of handheld equipment and belongs to the field of measurement for the nitrogen content of the plant leaf. The method finishes the operation of taking a picture of a leaf, image processing and calculation integrally by the handheld equipment so as to obtain the nitrogen content of the leaf. The device comprises handheld equipment (4) equipped with measuring software for the nitrogen content of the plant leaf, a background board (1) and a calibrating color block group (2), wherein the calibrating color block group (2) and the measured plant leaf (3) are respectively arranged at different positions on the background board (1); the handheld equipment (4) is positioned right above the background board (1). The color of the front surface of the background board (1) is different from the color of the measured plant leaf (3), the calibrating color block group (2) is fixed on the background board (1), the color of the calibrating color block group (2) is different from the color of the front surface of the background board (1) and the color of the measured plant leaf (3) and the color information is known. With the method and the device disclosed by the invention, the nitrogen content of the plant leaf can be quickly and conveniently measured in real time on site.

Description

technical field [0001] The invention relates to a method and a device for measuring the nitrogen content of plant leaves, belonging to the field of measuring the nitrogen content of plant leaves. Specifically, it relates to a method for measuring the nitrogen content of plant leaves based on a handheld device, and a device for measuring the nitrogen content of plant leaves used in the measurement method. Background technique [0002] Nitrogen is the most important and indispensable element in the nutrients needed by plants. At present, a lot of work has been done on the measurement of plant nitrogen nutrition. The general nitrogen nutrition measurement methods mainly include the following aspects: ①Soil nitrogen measurement : The measurement of soil nitrogen mainly includes soil total nitrogen measurement, available nitrogen measurement and soil inorganic nitrogen measurement. This method is mature, the result is stable and reliable, but the operation is cumbersome and time...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25
Inventor 郭文川周超超韩文霆
Owner NORTHWEST A & F UNIV
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