基于灰度关联-岭回归的荒漠土壤有机质含量高光谱估算
S127%S153.6+21; 为改善高光谱技术对荒漠土壤有机质的估测效果,该文采集了以色列Seder Boker地区的荒漠土壤,经预处理、理化分析后将土样分为砂质土和黏壤土2类,再通过光谱采集、处理得到6种光谱指标:反射率(reflectivity,REF)、倒数之对数变换(inverse-log reflectance,LR)、去包络线处理(continuum removal,CR)、标准正态变量变换(standard normal variable reflectance,SNV)、一阶微分变换(first order differential reflectance,FDR)和二阶微分...
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| Published in | 农业工程学报 Vol. 34; no. 14; pp. 124 - 131 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
西北农林科技大学中国旱区节水农业研究院,杨凌 712100%本古里安大学 Blaustein 沙漠研究所,思德博克 84990%西北农林科技大学中国旱区节水农业研究院,杨凌,712100
15.07.2018
西北农林科技大学水利与建筑工程学院,旱区农业水土工程教育部重点实验室,杨凌 712100 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.11975/j.issn.1002-6819.2018.14.016 |
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| Abstract | S127%S153.6+21; 为改善高光谱技术对荒漠土壤有机质的估测效果,该文采集了以色列Seder Boker地区的荒漠土壤,经预处理、理化分析后将土样分为砂质土和黏壤土2类,再通过光谱采集、处理得到6种光谱指标:反射率(reflectivity,REF)、倒数之对数变换(inverse-log reflectance,LR)、去包络线处理(continuum removal,CR)、标准正态变量变换(standard normal variable reflectance,SNV)、一阶微分变换(first order differential reflectance,FDR)和二阶微分变换(second order differential reflectance,SDR).通过灰度关联(gray correlation,GC)法确定SNV、FDR、SDR为敏感光谱指标,采用偏最小二乘回归(partial least squares regression,PLSR)法和岭回归(ridge regression,RR)法,构建基于敏感光谱指标的土壤有机质高光谱反演模型,并对模型精度进行比较.结果表明:砂质土有机质含量的反演效果要优于黏壤土;基于SNV指标建立的模型决定系数R2和相对分析误差RPD均为最高、均方根误差RMSE最低,所以SNV是土壤有机质的最佳光谱反演指标;对SNV-PLSR模型和SNV-RR模型综合比较得出,SNV-RR模型仅用全谱4%左右的波段建模,实现了更为理想的反演效果:其中,对砂质土有机质的预测能力极强(Rp2为0.866,RMSE为0.610 g/kg、RPD为2.72),对黏壤土有机质的预测能力很好(Rp2为0.863,RMSE为0.898 g/kg、RPD为2.37).荒漠土壤有机质GC-SNV-RR反演模型的建立为高光谱模型的优化、土壤有机质的快速测定提供了一种新的途径. |
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| AbstractList | S127%S153.6+21; 为改善高光谱技术对荒漠土壤有机质的估测效果,该文采集了以色列Seder Boker地区的荒漠土壤,经预处理、理化分析后将土样分为砂质土和黏壤土2类,再通过光谱采集、处理得到6种光谱指标:反射率(reflectivity,REF)、倒数之对数变换(inverse-log reflectance,LR)、去包络线处理(continuum removal,CR)、标准正态变量变换(standard normal variable reflectance,SNV)、一阶微分变换(first order differential reflectance,FDR)和二阶微分变换(second order differential reflectance,SDR).通过灰度关联(gray correlation,GC)法确定SNV、FDR、SDR为敏感光谱指标,采用偏最小二乘回归(partial least squares regression,PLSR)法和岭回归(ridge regression,RR)法,构建基于敏感光谱指标的土壤有机质高光谱反演模型,并对模型精度进行比较.结果表明:砂质土有机质含量的反演效果要优于黏壤土;基于SNV指标建立的模型决定系数R2和相对分析误差RPD均为最高、均方根误差RMSE最低,所以SNV是土壤有机质的最佳光谱反演指标;对SNV-PLSR模型和SNV-RR模型综合比较得出,SNV-RR模型仅用全谱4%左右的波段建模,实现了更为理想的反演效果:其中,对砂质土有机质的预测能力极强(Rp2为0.866,RMSE为0.610 g/kg、RPD为2.72),对黏壤土有机质的预测能力很好(Rp2为0.863,RMSE为0.898 g/kg、RPD为2.37).荒漠土壤有机质GC-SNV-RR反演模型的建立为高光谱模型的优化、土壤有机质的快速测定提供了一种新的途径. |
| Author | 张智韬 陈俊英 王海峰 Arnon Karnieli 韩文霆 |
| AuthorAffiliation | 西北农林科技大学水利与建筑工程学院,旱区农业水土工程教育部重点实验室,杨凌 712100;西北农林科技大学中国旱区节水农业研究院,杨凌 712100%本古里安大学 Blaustein 沙漠研究所,思德博克 84990%西北农林科技大学中国旱区节水农业研究院,杨凌,712100 |
| AuthorAffiliation_xml | – name: 西北农林科技大学水利与建筑工程学院,旱区农业水土工程教育部重点实验室,杨凌 712100;西北农林科技大学中国旱区节水农业研究院,杨凌 712100%本古里安大学 Blaustein 沙漠研究所,思德博克 84990%西北农林科技大学中国旱区节水农业研究院,杨凌,712100 |
| Author_FL | Wang Haifeng Chen Junying Zhang Zhitao Han Wenting Arnon Karnieli |
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| Keywords | 模型 岭回归 有机质 遥感 灰度关联 荒漠土壤 高光谱 |
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| Publisher | 西北农林科技大学中国旱区节水农业研究院,杨凌 712100%本古里安大学 Blaustein 沙漠研究所,思德博克 84990%西北农林科技大学中国旱区节水农业研究院,杨凌,712100 西北农林科技大学水利与建筑工程学院,旱区农业水土工程教育部重点实验室,杨凌 712100 |
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| Title | 基于灰度关联-岭回归的荒漠土壤有机质含量高光谱估算 |
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