| 基于近红外光谱分析的土壤全氮含量估测研究 |
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| 引用本文： | 张娟娟,熊淑萍,时 雷,马新明,王 高.基于近红外光谱分析的土壤全氮含量估测研究[J].土壤,2015,47(4):653-657. |
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| 作者姓名： | 张娟娟 熊淑萍 时 雷 马新明 王 高 |
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| 作者单位： | 河南农业大学信息与管理科学学院 |
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| 基金项目： | 河南科技攻关项目（112102110030）、河南省教育厅项目(14A210002)和公益性行业（农业）科研专项经费(201303109-6)资助 |
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| 摘 要： | 应用近红外光谱分析技术对比研究基于土壤风干样本和鲜样来预测全氮含量的可行性。选取水稻土为研究对象,首先分析了不同水分土壤的光谱特征,显示随水分含量增加,吸光度升高,且鲜样的吸光度高于干样。通过比较不同预处理方法,对土壤干鲜样分别采用逐步多元回归(SMLR)和偏最小二乘法(PLSR)建立了相应的近红外模型。结果表明,利用近红外光谱均可预测干鲜土壤样本的全氮含量,特别是利用偏最小二乘法建立的标定模型,预测精度高,反演性较好,鲜样和干样外部验证决定系数分别达到0.89和0.91,相对误差仅为6.92%和5.92%,研究结果可以为田间土壤全氮含量的估测提供技术依据和参考。
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| 关 键 词： | 近红外光谱 土壤 全氮 PLSR SMLR |
| 收稿时间： | 2013/12/1 0:00:00 |
| 修稿时间： | 2014/6/15 0:00:00 |
Soil Nitrogen Content Prediction with Near Infrared Spectroscopy |
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| ZHANG Juan-juan,XIONG Shu-ping,SHI Lei,MA Xin-ming and WANG Gao.Soil Nitrogen Content Prediction with Near Infrared Spectroscopy[J].Soils,2015,47(4):653-657. |
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| Authors: | ZHANG Juan-juan XIONG Shu-ping SHI Lei MA Xin-ming and WANG Gao |
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| Institution: | Henan Agricultural University |
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| Abstract: | The present work was focused on analyzing the feasibility of predicting N content in humid and dry soil with Near Infrared Spectroscopy (NIRS). Firstly, the spectral characteristics of paddy soil in southern China were studied, and the effects of different moisture contents on soil spectrum were analyzed. With moisture increasing, spectral absorbance hoisted and humid soil showed higher absorbance than dry soil by adopting the pretreatment methods of spectrum, the calibration models were established with PLSR and SMLR. The result showed that soil total nitrogen whether with humid or dry sample can be predicted using near infrared spectroscopy, especially model established by PLSR with high accuracy. From external validation, Rv2 and RMSEP of dry soil and humid soil were o.89 and 0.91, 6.92% and 5.92%, respectively. It may provide technical support and reference for soil total nitrogen content in the field. |
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| Keywords: | Near Infrared Spectral Soil N PLSR SMLR |
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