Method, device, equipment and medium for monitoring and diagnosing low-temperature cold damage of crops in irrigated area

The invention relates to a method, a device, equipment and a medium for monitoring and diagnosing low-temperature cold damage of crops in an irrigation area. The method comprises the following steps: collecting farmland multi-source data in the irrigation area; key indexes are calculated based on the farmland multi-source data, and the key indexes comprise land surface temperature LST, enhanced vegetation index EVI, sunlight induced chlorophyll fluorescence SIF and solar declination delta; and calculating the calculated key indexes through a pre-constructed irrigation area farmland air temperature estimation model to obtain the daily average air temperature of the farmland, and monitoring and diagnosing the low-temperature cold damage of the farmland crops based on the low-temperature cold damage judgment standard of the farmland crops. According to the method, the air temperature of the irrigated area farmland can be accurately estimated by utilizing multi-source remote sensing data and comprehensively consi