Novel radiometric indices derived from close-range observations for assessing crop growth, yield and productive structure

我们提出了新的近距离观测方法，田间作物的产量构成，养分状况和冠层生产结构评估光谱辐射和图像工程。以前未开发的方法：在野外试验中，对夜间测量、中红外波段、偏振图像和连续定点光谱波段图像观测以及纹理分析进行了离散试验。这些方法有潜力非破坏性地估计，例如，植物高度，叶面积，氮密度，生物量，生长阶段，谷物产量，叶色和叶倾角具有高度的准确性。

We have proposed new close-range observation methods for field crops to assess yield components, nutrient condition and canopy productive structure using spectral radiometry and image engineering. Previously unexplored methods : nighttime measurement, middle infrared wavelength range, polarization image and continuous fixed-point spectral band image observations, and texture analysis, were discretely tested in field experiments. These methods had potential to non-destructively estimate, for example, plant height, leaf area, nitrogen density, biomass, growth stage, grain yield, leaf color and leaf inclination angle with high degrees of accuracy.