2019年3月9日山东省栖霞市苹果园土壤高光谱数据
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2019年3月9日，在山东省栖霞市观里镇苹果园采集样品。在12个果园，采用五点法，在0-40cm采样深度，用土钻采集60个土壤样品。样品在实验室干燥，采用ASD Field-Spce4.0光谱仪测定土壤样品的光谱。仪器的波段范围为350-2500nm，在350-1000 nm波段范围内，光谱采样间隔为1.4nm，分辨率为3nm;在1001-2500 nm波段范围内，光谱采样间隔为2nm，分辨率为8nm。将土样置于直径为10cm、深度为1.5cm的容器中，将土样表面平滑处理。传感器探头放置在垂直于土壤样品表面10cm的距离。每次采集光谱数据前，仪器都要进行校准。每个样品重复观察10次，取平均值作为样品的土壤光谱。
On March 9, 2019, soil samples were collected from apple orchards in Guanli Town, Qixia City, Shandong Province. Sixty soil samples were collected using a soil auger via the five-point sampling method at a sampling depth of 0–40 cm across 12 orchards. All samples were air-dried in the laboratory, and their spectral reflectance was measured using an ASD FieldSpec 4.0 spectrometer. The spectral range of the instrument was 350–2500 nm: for the 350–1000 nm band, the spectral sampling interval was 1.4 nm with a resolution of 3 nm; for the 1001–2500 nm band, the spectral sampling interval was 2 nm with a resolution of 8 nm. Soil samples were placed into containers with a diameter of 10 cm and a depth of 1.5 cm, and the surface of each soil sample was smoothed flat. The sensor probe was positioned at a vertical distance of 10 cm above the soil sample surface. The instrument was calibrated prior to each spectral data acquisition. For each sample, 10 repeated measurements were performed, and the average value was taken as the soil spectrum of the sample.
