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首页> 外文会议>Annual International Meeting of the American Society of Agricultural and Biological Engineers >Comparison of Two Spectrometers for Profile SoilCarbon Sensing
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Comparison of Two Spectrometers for Profile SoilCarbon Sensing

机译：两种光谱仪对剖面土壤碳传感的比较

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Visible and near-infrared reflectance spectroscopy satisfies the need for speed and precision in estimation of soil carbon and other soil properties. Previous work has established accuracy of the method, with much of the reported research done using bench spectrometers from a single manufacturer. However, other equipment is now available, capable of both bench and in-situ field operation. Therefore, the objective of this research was to compare two spectrometers, with emphasis on the consistency of soil carbon detection across instruments and determination of the impact wavelength range has on carbon detection. Additionally, the impact of bench versus in-situ probe data acquisition was examined. The spectrometers used were the ASD FieldSpec Pro FR operated as a bench model and the Veris P4000 VIS-NIR-EC-Force Probe operated as both a bench instrument and as a profiling device used in the field. At field sites in Missouri, Nebraska and Pennsylvania, probe spectrometer data were collected, followed by the removal of soil cores at each probe scanning site. The cores were then scanned with each bench top spectrometer. Partial least squares regression was used for statistical analysis and model development. Results showed that C estimation accuracy wasvery similar for the two spectrometers in bench mode, and that good C estimates were maintained with in-situ operation of the Veris instrument. Wavelength analysis confirmed that the visible spectral range had a negligible effect on C estimation accuracy. These results further validate the effectiveness of reflectance spectroscopy, including in-situ scanning with probe-style devices, for estimation of soil carbon.
机译：可见和近红外反射光谱谱满足速度和精度估计土壤碳等土壤性质。以前的工作已经建立了该方法的准确性，其中许多报告的研究使用了来自单个制造商的台式光谱仪。但是，现在可用的其他设备，能够进行替补和原位现场操作。因此，本研究的目的是比较两种光谱仪，重点是横跨仪器的土壤碳检测的一致性，并且撞击波长范围对碳检测的确定。此外，检查了替补座与原位探针数据采集的影响。所使用的光谱仪是作为台式模型操作的ASD FieldSpec Pro FR，并且VeriS P4000 VIR-EC-Force探针作为台式仪器操作，并作为该领域中使用的分析设备。在密苏里州，内布拉斯加州和宾夕法尼亚州的野外网站，收集了探测光谱仪数据，然后在每个探针扫描部位去除土壤核心。然后用每个台式光谱仪扫描核心。部分最小二乘回归用于统计分析和模型开发。结果表明，C估计精度对于台高模式中的两个光谱仪类似的估计精度相似，并且在Veris仪器的原位运行中保持了良好的C估计。波长分析证实，可见光谱范围对C估计精度具有可忽略不计的影响。这些结果进一步验证了反射光谱的有效性，包括使用探针扫描的原位扫描，用于估计土壤碳。

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