Detection of vegetation indices of grape plantations as one of the tools for monitoring the condition of vineyards

Relevance. Vegetation indices (VI) indices allow one to correlate the estimated signs of growth vigor of a grape plant with productivity values in different periods of phenophases. Grapes respond especially subtly to conditions of weather and climate changes and abnormal weather manifestations. For monitoring vineyards, NDVI is the most effective. The use of Sentinel-2 satellite data in monitoring vineyards has shown high efficiency throughout the entire growing season, and in many countries research is underway on the use of VI to assess the development and productivity of vineyards.

The aim of the work is to find the optimal formula for calculating the productivity of a grape plant based on the values of NDVI.

Methods. Stationary field experience of agrobiological characteristics of grape plantations, processing of digital images of spectral channels of the Sentinel-2 satellite platform. Digital image processing and calculation of NDVI VI were carried out in the GIS SNAP Desktop.

Results. Based on the VI values, the phenological periods of the grape planting were determined to calculate the predicted yield. The presence of a close relationship between vegetation indices, crown density and yield makes it possible to determine the strength of development of grape plants during phenological periods using multispectral satellite images. The developed method for assessing the predicted yield based on the NDVI VI of a grape plant in the phenophases of flowering and growth allows one to calculate the predicted yield with high accuracy in relation to the actual one.

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