Method for aerially photographing crop canopy picture for crop nitrogen analysis and soil fertilization guidance by using unmanned aerial vehicle and aerial photograph equipment of unmanned aerial vehicle

Abstract

The invention discloses a method for aerially photographing a crop canopy picture for crop nitrogen analysis and soil fertilization guidance by using an unmanned aerial vehicle. The crop canopy picture is aerially photographed through the unmanned aerial vehicle, meanwhile, aerial latitude and longitude corresponding to the crop canopy picture are obtained, and crop nitrogen analysis and soil fertilization guidance are carried out by combining picture information and latitude and longitude information. According to the obtained method, large-area farmland information can be quickly obtained, influence and limitation of crop growth and farmland environments are avoided, a crop nitrogen state is diagnosed by using color parameters of the picture and the nitrogen fertilizer topdressing index is recommended, the method is accurate and reliable, accurate management of a nitrogen fertilizer is facilitated and better economical and ecological benefits are achieved. The method is fast and simple in operation, stable and reliable in structure, low in operation cost and beneficial to farmland application and popularization; and fine farming of the farmland can be significantly promoted. The aerial photograph equipment of the unmanned aerial vehicle is simple in structure and beneficial to efficient and stable aerial photographing of the crop canopy picture.

Description

technical field [0001] The invention relates to the technical field of crop nitrogen analysis, in particular to a method for analyzing crop nitrogen and guiding soil fertilization by using drone aerial photographs of crop canopy images, and the drone aerial photographing equipment used in the method. Background technique [0002] Nitrogen fertilization is a common and important measure to increase yield quickly and effectively in agricultural production, but the traditional fertilization method often adopts the method of uniform application, which is not conducive to the improvement of crop yield and quality, reduces the fertilizer utilization rate, and excessive fertilizer also causes Severe soil and environmental pollution. As an important part of precision agriculture, variable fertilization advocates fertilization according to local conditions according to the differences in soil and plants in different parts of the field, and has become a hot spot in modern agronomic re...

AI Technical Summary

Problems solved by technology

However, due to the lack of low-cost, large-area, high-precision and high-reliability technologies for efficiently obtaining farmland information, field information acquisition has become a bottleneck restricting the application of precision agriculture technology

In the past, field information mainly relied on the acquisition of sampling information. For example, Lukina et al. used field spectrometers to obtain wheat nitrogen information at sampling points. Gotway et al. measured soil nutrient information at sampling points and used the Kriging interpolation method to obtain continuous soil nutrient information for the entire field. information; these information acquisition methods are not only time-consuming in data acquisition, but also impossible to obtain enough points for interpolation calculations, making it difficult to obtain field surface information that meets the accuracy requirements

Bao Yansong and others used the remote sensing monitoring method to collect hyperspectral data of crops through aviation and an airborne practical modular imaging spectrometer to predict nitrogen and realize variable fertilization technology. Although the information collection and analysis accuracy of this technology is high, due to The limitation of information acquisition equipment and usage cost makes it difficult to popularize this technology

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