Monitoring method of wheat nitrogen nutrition based on spectral and texture features

Abstract

The invention provides a remote sensing monitoring method of wheat nitrogen nutrition based on spectral and texture features. The method comprises the following steps of: (1) constructing a spectral texture index for monitoring the nitrogen nutrition status of wheat by using the spectral and texture characteristics of a wheat reflectance image taken by a drone during different growth stages of thewheat; establishing a leaf nitrogen content monitoring model and a leaf nitrogen accumulation monitoring model, respectively, and then using the nitrogen nutrient data of the wheat collected from theground to test the leaf nitrogen content monitoring model and the leaf nitrogen accumulation monitoring model; obtaining the optimal leaf nitrogen content monitoring model and leaf nitrogen accumulation monitoring model of the wheat; (2) respectively inputting multi-spectral data collected by the drone into the optimal leaf nitrogen content monitoring model and leaf nitrogen accumulation monitoring model to obtain the leaf nitrogen content and leaf nitrogen accumulation of the wheat. The method of the invention comprehensively monitors the nitrogen nutrition status of the wheat canopy leaf byusing the spectral and texture features of the multi-spectral image taken by the drone, and overcomes the shortcomings of the traditional monitoring method being susceptible to the "saturation effects".

Description

technical field [0001] The invention relates to remote sensing monitoring technology, more specifically, to a remote sensing monitoring method for wheat nitrogen nutrition based on spectrum and texture features. Background technique [0002] Wheat is the main food crop in my country, and it is also the food crop with the widest distribution and the largest planting area in the world. Nitrogen is the most important limiting nutrient element for wheat growth and yield. The total nitrogen content of wheat is about 0.3-5% of dry weight. Nitrogen in wheat plants participates in the composition of chlorophyll, protein, nucleic acid and enzyme. During the growth of wheat, if there is a lack of nitrogen, the growth of the above-ground and root systems will be inhibited, and the formation and development of reproductive organs will also be affected. If too much nitrogen fertilizer is applied, the excess nitrogen fertilizer cannot be absorbed and utilized by wheat, and most of the nit...

AI Technical Summary

Problems solved by technology

The traditional remote sensing method for monitoring wheat nitrogen nutrition is mainly based on a single spectral feature, which has a "saturation effect" in monitoring wheat nitrogen nutrition solely on spectral features, and is also susceptible to the phenomenon of "same spectrum and foreign matter", which affects wheat nitrogen nutrition. Monitoring accuracy

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