Method for quickly monitoring nitrogen content of tobacco

Abstract

The invention discloses a method for quickly monitoring the nitrogen content of tobacco, which comprises the following steps of obtaining a multispectral reflection image of a tobacco planting area byusing an unmanned aerial vehicle carrying a multispectral sensor, and screening out a spectral index related to the nitrogen content; collecting tobacco leaves of tobacco plants with different growthconditions as sample plants, and measuring the nitrogen content of the tobacco leaves of the sample plants; respectively constructing regression models of the nitrogen content and the spectral indexby taking the actually measured nitrogen content of the sample plant tobacco as a dependent variable and the spectral index related to the nitrogen content as an independent variable to obtain the spectral index with the optimal indication of the nitrogen content of the tobacco in different growth periods; respectively constructing nitrogen content monitoring models of the tobacco in different growth periods by taking the obtained spectral index with the optimal indicating property as an independent variable and the actually measured nitrogen content of the sample plant tobacco as a dependentvariable; based on the nitrogen content monitoring model of the tobacco in different growth periods, calculating the nitrogen content distribution of the whole tobacco planting area respectively, andthe method can realize large-scale rapid monitoring of the nitrogen content of the tobacco.

Description

technical field [0001] The invention relates to the field of monitoring, in particular to a method for quickly monitoring the nitrogen content of tobacco. Background technique [0002] Nitrogen content is one of the important indicators reflecting the growth status of tobacco and the quality of tobacco leaves. Nitrogen content is closely related to the growth and development, quality control, economic benefits and environmental protection of tobacco. Timely and accurate grasp of the nitrogen content level of tobacco is conducive to precise fertilization of tobacco fields, control of tobacco quality, and improvement of industrial economic benefits. At the same time to achieve environmental friendliness. [0003] Traditional tobacco nitrogen content monitoring methods are mostly obtained through field sampling and laboratory chemical analysis. If the sampling amount of this method is small, it often cannot truly reflect the nitrogen content level of field tobacco, and it is ...

AI Technical Summary

Problems solved by technology

If the sampling amount of this method is small, it often cannot truly reflect the nitrogen content level of field tobacco, and it is difficult to realize large-scale monitoring; if the sampling amount is increased, the accuracy will be improved, but the operation is complicated and time-sensitive, and a large number of samples need to be collected destructively , high cost, not an ideal method for monitoring nitrogen content in the field

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