Device and method for detecting leaf lignin content of field maize plants

Abstract

The invention relates to the technical field of spectrum detection, in particular to a device and method for detecting the leaf lignin content of field maize plants. The device comprises a suspension device, an electric drive trolley and a data processing module. The suspension device is composed of a right-angle telescopic arm, a universal joint and a bent cutter suspension arm. The electric drive trolley is composed of a frame, a power device, wheels and a mini-type direct current motor. The data processing module is installed on a vertical rod at the front portion of the frame. The suspension device and the electric drive trolley are connected through a connecting rod. The method for detecting the leaf lignin content includes the steps of (a) device preparation, (b) spectrum white board correction, (c) spectrum collection angle adjustment and (d) physical and chemical value calculation. According to the device and method, field detection is conducted, detection does not need to be conducted in a laboratory, detection efficiency is high, maize leaves can be measured in all directions, the better measurement angle can be acquired according to the natural growth shape of the different maize leaves, spectrum data of the front faces and the back faces of the maize leaves are collected, and the whole device is simple, practical, low in cost and easy to popularize.

Description

technical field [0001] The invention relates to the field of spectral detection of crop leaves, in particular to a device for detecting lignin content of field corn plant leaves. Background technique [0002] Corn fruit contains a lot of nutrients such as protein, sugar, fat, vitamins and trace elements such as selenium and magnesium. Therefore, corn is very popular among ordinary people in our country, and the annual output is very large. The lignin content in corn leaves is a kind of high-molecular organic substance second only to cellulose, and it is an important component to maintain the normal structure of corn leaves, conduct water and nutrients, and defend against pathogenic bacteria. The crop cell wall is mainly composed of cellulose, hemicellulose and lignin. The crop cell wall is on the periphery of the cell membrane, which has the function of protecting and supporting cells, and can resist the invasion of crops by external adverse factors. And lignin is consider...

AI Technical Summary

Problems solved by technology

[0003] The determination of lignin content in corn leaves is still mainly based on the Krasson lignin determination method. This method requires destructive treatment of crops, is time-consuming and laborious, and requires more labor costs. The analysis process has more mechanical operations and is generally not necessary. It is suitable for analyzing a large number of samples, and it is not suitable for detecting the lignin content of corn leaves in vivo. It is difficult to meet the requirements of rapid and dynamic monitoring of digital agriculture and agricultural Internet of Things information. Taking into account the accuracy of measurement data, convenient operation, and environmental protection and pollution-free characteristics, the use of Spectroscopy techniques have been used to some extent

[0004] Due to the different growth shapes of corn leaves, on-site measurement has high requirements for the projection angle of the light source and the incident angle of the spectral probe. Most of the existing spectral detection methods for the lignin content of corn leaves are to pick new leaves and pack them with crushed ice to keep them fresh to prevent the leaves from deteriorating. Affects the accuracy of spectral measurement of lignin content, and requires high real-time measurement of lignin content

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