【摘要】 相比传统的化学方法及主观视觉测定植物生理信息指标,通过光谱辐射仪对农作物冠层信息的评估更简单、快速和精确。本文结合近年来农作物群体信息的获取方法,综述了不同类型光谱仪尤其以国际上应用最广泛的Cropscan多光谱辐射仪在农作物群体叶面积指数、生物量、氮素及叶绿素的预测,病虫害的监测及产量预测中的应用。总结了不同类型的的植被指数(VIs)、冠层光谱的获取及光谱分析方法,比较了不同农作物建立相关模型的回归系数。总体上建立的数学模型的相关系数较高,能实现对农作物各种生理信息等的检测。此外,将多光谱辐射仪与多种传感器相结合所得到的综合信息对于全面评价农作物生长情况具有重要指导价值。更多还原

【Abstract】 Compared with the traditional chemical methods and the subjective visual ways for measuring plant physiology information indicators,the assessments of crop canopy information through spectral radiometer are more simple,rapid and accurate.The applications of different types of spectral radiometer,especially for international general used Cropscan multispectral radiometer,for predicting crop canopy leaf area index under different growth stage,biomass,nitrogen,chlorophyll and yield,and monitoring plant diseases and insect pests were summarized based on crop group information acquisition methods in recent years.The varity of vegetation indices(VIs)were concluded after comparing regression coefficients of related models among different crops.In general,the correlation coefficients of mathematical models were high and it can realize the crop detection of various kinds of physiological information.Besides,the combination of multispectral radiometer and other sensors can provide useful information to evaluate the status of crops growth,which is very important in practice.更多还原