Portable non-destructive detecting method and detecting instrument for plant nitrogen and water content
A plant nitrogen, non-destructive testing technology, applied in the system field of plant nutrient state testing, can solve problems such as environmental pollution, waste liquid generation, slow measurement speed, etc.
Inactive Publication Date: 2009-02-18
BEIJING RES CENT FOR INFORMATION TECH & AGRI
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Problems solved by technology
[0003] The purpose of the present invention is: to overcome the original chemical method, visible spectrum or liquid chromatography when measuring nitrogen content in plant leaves, its measurement speed is slow, the measurement process needs to consume reagents, and also produces waste liquid, which is harmful to the environment. Defects that cause pollution; more importantly, defects that cause damage to crop leaves when measuring nitrogen content in plant leaves; in order to achieve non-destructive testing of nitrogen content in crop leaves during field growth; thus providing a multi-purpose The system and method for non-destructive detection of the pigment content in crop leaves by wavelength correction background and removal of the influence of background components. Portable non-destructive detection of nitrogen nutrition status of field plants
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[0051] Refer to attached figure 1 , develop a portable non-destructive measuring instrument for plant nitrogen and moisture content, comprising: a housing 12, a blade clamp 1 mounted on the housing 12 for clamping the blade to be measured; the blade clamp includes an upper arm 2 and The lower arm 3 has two parts, and the light source 5 for analysis and the photodetector 6 for analysis are relatively arranged in the two arms. not shown in), a neutral reference sample sliding clamp 4 is installed in the slideway, and the two are slidably matched; a keyboard 8 and a liquid crystal display 9 are installed on one wall of the casing 12; Battery slot 11, and system circuit board 16; during detection, a blade to be tested or a neutral reference sample 13 is placed between the light source 5 and the photodetector 6 installed on the two arms.
[0052] Refer to attached figure 2 with 3 : The shown system circuit device is made into a board, including 4-way LED drive circuit 14, seri...
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Abstract
The portable non-destructive plant nitrogen and water content detection system includes four wavelength spectral measurement device with oppositely set light source and detector, neutralized reference sample or leaf to be measured, micro controller connected to the light source and the detector, serial port circuit connected electrically to the micro controller, and display and keyboard connected electrically to the micro controller too. The detection method includes detecting data I0 and I, calculating the fresh leaf transmission T= I / I0 of different wavelengths, and calculating the plant chlorophyll, water content and relative content NI reflecting the nitrogen level in the leaf in chemical metering algorithm. Compared with traditional measurement method, the present invention has decades times raised efficiency and no production of environment harming matter, and may be used in great area fast field measurement.
Description
technical field [0001] The invention relates to a system for detecting the nutritional status of plants, in particular to a portable non-destructive detection method and measuring instrument for plant nitrogen and water content. Background technique [0002] Nitrogen is an essential nutrient element for crop growth and development. It is a component of chlorophyll, protein, and nucleic acid in plants, and a component of many endogenous hormones, accounting for 1% to 7% of plant dry weight. Nitrogen compounds are mainly concentrated in areas where crop life activities are vigorous, such as leaves and meristems, etc. It is an essential nutrient element for crop growth and development, and is of great significance to crop life activities. In production practice and scientific research, we need to keep crops at an appropriate level of nitrogen, and we need to analyze the nitrogen content of crop plants. There are many existing methods for analyzing the nitrogen level of crops, ...
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IPC IPC(8): G01N21/59G01N21/31G01N33/00
CPCG01N2021/8466G01N2201/0221G01N21/3554
Inventor 王纪华赵春江黄文江孙刚郑文刚刘良云王忠义严衍禄
Owner BEIJING RES CENT FOR INFORMATION TECH & AGRI