Testing the Robust Yield Estimation Method for Winter Wheat, Corn, Rapeseed, and Sunflower with Different Vegetation Indices and Meteorological Data

Remote Sensing

Anikó Kern¹  János Lichtenberger¹  Péter Bognár¹  Szilárd Pásztor¹  Péter Steinbach¹ 

[1] Space Research Group, Department of Geophysics and Space Sciences, Institute of Geography and Earth Sciences, ELTE Eötvös Loránd University, H-1117 Budapest, Hungary;

关键词: MODIS;    vegetation index;    yield forecasting;    meteorological data;   

DOI  :  10.3390/rs14122860

来源: DOAJ

【 摘 要 】

Remote sensing-based crop yield estimation methods rely on vegetation indices, which depend on the availability of the number of observations during the year, influencing the value of the derived crop yield. In the present study, a robust yield estimation method was improved for estimating the yield of corn, winter wheat, sunflower, and rapeseed in Hungary for the period 2000–2020 using 16 vegetation indices. Then, meteorological data were used to reduce the differences between the estimated and census yield data. In the case of corn, the best result was obtained using the Green Atmospherically Resistant Vegetation Index, where the correlation between estimated and census data was R² = 0.888 before and R² = 0.968 after the meteorological correction. In the case of winter wheat, the Difference Vegetation Index produced the best result with R² = 0.815 and 0.894 before and after the meteorological correction. For sunflower, these correlation values were 0.730 and 0.880, and for rapeseed, 0.765 and 0.922, respectively. Using the meteorological correction, the average percentage differences between estimated and census data decreased from 7.7% to 3.9%, from 6.7% to 3.9%, from 7.2% to 4.2%, and from 7.8% to 5.1% in the case of corn, winter wheat, sunflower, and rapeseed, respectively.

【 授权许可】

Unknown