The use of canopy thermography is an innovative approach for salinity stress detection in plants. But its applicability for landscape scale studies using satellite sensors is still not well investigated. The aim of this research is to test the satellite thermography soil salinity assessment approach on a study area with different crops, grown both in irrigated and rainfed conditions, to evaluate whether the approach has general applicability. Four study areas in four different states of Australia were selected to give broad representation of different crops cultivated under irrigated and rainfed conditions. The soil salinity map was prepared by the staff of Geoscience Australia and CSIRO Land and Water and it is based on thorough soil sampling together with environmental modelling. Remote sensing data was captured by the Landsat 5 TM satellite. In the analysis we used vegetation indices and brightness temperature as an indicator for canopy temperature. Applying analysis of variance and time series we have investigated the applicability of satellite remote sensing of canopy temperature as an approach of soil salinity assessment for different crops grown under irrigated and rainfed conditions. We concluded that in all cases average canopy temperatures were significantly correlated with soil salinity of the area. This relation is valid for all investigated crops, grown both irrigated and rainfed. Nevertheless, crop type does influence the strength of the relations. In our case cotton shows only minor temperature difference compared to other vegetation classes. The strongest relations between canopy temperature and soil salinity were observed at the moment of a maximum green biomass of the crops which is thus considered to be the best time for application of the approach.

冠层热成像技术是一种用于植物盐分胁迫检测的创新方法。但是，其在使用卫星传感器进行景观尺度研究中的适用性仍未得到很好的研究。这项研究的目的是在灌溉和雨养条件下生长的不同作物的研究区域上测试卫星热成像土壤盐分评估方法，以评估该方法是否具有普遍适用性。选择了澳大利亚四个不同州的四个研究区域，以广泛代表灌溉和雨养条件下种植的不同农作物。土壤盐度图是由澳大利亚地质科学局和CSIRO Land and Water的工作人员绘制的，它基于对土壤的彻底采样以及环境建模。遥感数据是由Landsat 5 TM卫星捕获的。在分析中，我们使用植被指数和亮度温度作为冠层温度的指标。应用方差和时间序列分析，我们研究了冠层温度卫星遥感作为土壤盐分评估方法的适用性，该方法适用于灌溉和雨养条件下种植的不同农作物。我们得出的结论是，在所有情况下，平均冠层温度均与该地区的土壤盐分显着相关。该关系对所有调查过的，灌溉和雨养的农作物均有效。但是，农作物类型确实会影响关系的强度。在我们的案例中，与其他植被相比，棉花仅表现出较小的温差。