Abstract: Crop temperature is derived from the energy exchange between the crop and the environment, the change of crop temperature is an effective monitoring indicator of crop growth. Infrared thermal imaging technology can reflect the surface temperature of the object through the infrared thermal radiation of the object. Currently, crop temperature is always explored as an affiliated issue from the aspect of energy budget instead of a synthetic and logic consideration．In order to analysis the causes of crop temperature comprehensively, this paper made a brief review on crop temperature from external reason, internal reason and monitoring method; introduced the factors of affecting temperature, including variety characteristics, growth period, different organs, light, temperature, water, CO2, wet, wind, planting density, fertilization, etc. Also, the application of thermal infrared technology in the monitoring of crop growth status was described. Finally, the problems existing in the field of crop monitoring were summarized, and the future research was prospected.

Key words: crop temperature, growth monitoring, canopy temperature, thermal imaging

摘要： 作物温度是作物与周围环境进行能量交换的结果，作物温度的变化是有效监测作物生长状态的观测指标,红外热成像技术能够将物体红外热辐射转化为物体表面温度图。综述了影响作物温度变化的因素，包括品种特性、生育时期、不同器官、光照、温度、水分、CO2浓度、湿度、风速、种植密度、施肥等，阐述了作物植株温度监测技术在作物生长状态监测上的应用，总结了红外热成像技术在作物监测领域存在的问题，并对未来进一步研究进行了展望，以期为开展作物温度及作物热红外监测研究提供参考。

关键词: 作物温度, 生长监测, 冠层温度, 热成像