A Study on Oilseed Rape Yield Estimation Based on Enhanced Vegetation Index at the Flowering Stage and Meteorological Data

Oilseed rape is a significant oilseed crop in China. Regional yield estimation is a highly effective method for ensuring the profitability of agriculture and addressing the issue of food security. This study focused on the principal oilseed rape regions in Zhejiang Province, China. A regression model based on remote sensing and meteorological data from 20152019 was proposed to estimate the yield of oilseed rape in Zhejiang Province by municipality. In the model, the average annual yield of oilseed rape depends on the mean enhanced vegetation index (EVI) at the flowering stage, the effective cumulative temperature in February and the total precipitation in May. The estimated data were cross-validated with yield data published by the Zhejiang Bureau of Statistics for the same period. The coefficient of determination (R
²
) of the model is 0.839.