NIRS calibration and validation results for quality indices of commercial organic fertilizers.

Note that: TOM, total organic matter; TN, total nitrogen; WSOC, water soluble organic carbon; WSON, water soluble organic nitrogen; EC, electrical conductivity; GI, germination index; PC, number of principal component; R2, the coefficient of determination for the calibration set; RMSECV, the root mean square error in cross validation; r2, the coefficient of determination for the validation set; RMSEP, room mean squared error of prediction; RPD, the ratio of the standard deviation in the validation set over the room mean squared error of prediction. The calibration and validation of some indices (i.e., moisture content, TOM, WSOC, pH) was conducted using the second derivative with SNV, but that for the others was conducted using only the second derivative.

请注意：总有机质（TOM，total organic matter）、总氮（TN，total nitrogen）、水溶性有机碳（WSOC，water soluble organic carbon）、水溶性有机氮（WSON，water soluble organic nitrogen）、电导率（EC，electrical conductivity）、发芽指数（GI，germination index）、主成分数（PC，number of principal component）、校正集决定系数（R2，coefficient of determination for the calibration set）、交叉验证均方根误差（RMSECV，root mean square error in cross validation）、验证集决定系数（r2，coefficient of determination for the validation set）、预测均方根误差（RMSEP，root mean squared error of prediction）、验证集标准差与预测均方根误差的比值（RPD，the ratio of the standard deviation in the validation set over the root mean squared error of prediction）。部分指标（即含水率、总有机质、水溶性有机碳、pH值）的校正与验证采用二阶导数结合SNV方法，其余指标的校正与验证仅采用二阶导数。