摘要
选取我国东北黑土作为研究对象,研究其光谱特性并分析黑土主要参数与近红外光谱的相关性。通过比较东北黑土和北方潮土光谱特征的差异,显示当水分含量较高时,两种土壤的光谱特性差别不是很明显,当水分含量较低时,受土壤质地的影响,两种土壤的吸光度光谱及微分光谱均有很大差异。土壤水分值和吸收光谱有很大相关系数,土壤全氮与光谱呈现出了一定的相关性,提高土样全氮含量的方差,可以获得高的相关系数;由于黑土中有机质的含量很高,使基于土壤有机质的光谱吸收达到饱和,二者之间呈现较低的相关性。
The spectral characteristics of black soil in northeast China were studied, and the difference of the characteristics was discussed between the black soil and the grey-brown alluvial soil in northern China. Results showed that the spectral characteristics of the two types of soil with higher moisture content were very alike, while the NIR absorbance spectra and the first derivative spectra of the two types of soil exhibited great difference with lower moisture content. The possible reason was the influence of soil texture. The correlation analysis between the main soil parameters and NIR absorbance spectra of raw soil samples was conducted. There was a high correlation between soil moisture content and absorbance spectra And correlation was observed between soil TN（total nitrogen） and absorbance spectra However, it was not observed for soil organic matler（SOM） since SOM of black soil in northeast China was higher, and the spectral absorbance of SOM attained saturation.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2007年第8期1502-1505,共4页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(30370812)资助
关键词
近红外光谱
微分光谱
东北黑土
NIR absorbanee spectra
First derivative spectra
Black soil in northeast China
