The potential of near-infrared reflectance spectroscopy to analyse soil chemical and physical characteristics
The potential of near-infrared reflectance spectroscopy to analyse soil chemical and physical characteristics
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DOI：
10.1017/s0021859602002836
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发表时间：
2003-02-01
影响因子：
2
通讯作者：
Morón, A
中科院分区：
文献类型：
--
作者：
Cozzolino, D;Morón, A
利用近红外反射光谱法（NIRS）对土壤样品中的粉粒、砂粒、粘粒、钙（Ca）、钾（K）、钠（Na）、镁（Mg）、铜（Cu）和铁（Fe）进行了分析。来自乌拉圭（南美洲）的不同土壤样品共332个。在NIRS 6500（NIRSystems，银Spring，MD，USA）中以反射率扫描样品。应用交叉验证以避免模型的过拟合。校正决定系数（R-cal（2））和交叉验证标准误差（SECV）分别为0.80（SECV：6.8）、0.84（SECV：6.0）和0.90（SECV：3.6）。K、Ca、Mg的R-cal（2）和SECV分别为0.80（SECV：0.1）、0.95（SECV：2.9）和0.90（SECV：0.8），Cu和Fe的R-cal（2）和SECV分别为0.86（SECV：0.82）和0.92（SECV：25.5）。结果表明，近红外光谱技术具有分析速度快、成本低等优点，在土壤常规分析中具有很大的应用潜力。
Near-infrared reflectance spectroscopy (NIRS) was used for the analysis of soil samples for silt, sand, clay, calcium (Ca), potassium (K), sodium (Na), magnesium (Mg), copper (Cu) and iron (Fe). A total of 332 samples of different soils from Uruguay (South America) were used. The samples were scanned in a NIRS 6500 (NIRSystems, Silver Spring, MD, USA) in reflectance. Cross validation was applied to avoid overfitting of the models. The coefficient of determination in calibration (R-cal(2)) and the standard errors in cross validation (SECV) were 0.80 (SECV : 6.8), 0.84 (SECV : 6.0),0.90 (SECV : 3.6) in per cent for sand, silt and clay respectively. For both macro and microelements the R-cal(2) and SECV were 0.80 (SECV: 0.1), 0.95 (SECV: 2.9),0.90 (SECV 0.8), for K, Ca, Mg in g/kg respectively, and 0.86 (SECV: 0.82) and 0.92 (SECV : 25.5) for Cu and Fe in mg/kg. It was concluded that NIRS has a great potential as an analytical method for soil routine analysis due to the speed and low cost of analysis.