基于吸收特征参数的有机质含量光谱估算模型研究  

Studying on Retrieval of Soil Organic Matter Content Using the Absorption Spectra

作　　者：贺军亮[1] 蒋建军[2] 周生路[3] 赵旭阳[1] 李朝阳[1] 

机构地区：[1]石家庄学院资源与环境系,050035 [2]南京师范大学地理科学学院,210097 [3]南京大学地理与海洋学院,210008

出　　处：《农机化研究》2009年第3期30-33,共4页Journal of Agricultural Mechanization Research

基　　金：国家重点基础研究发展规划(973)项目(2002CB410800);教育部博士点专项基金项目(20050319003);石家庄学院基金重点项目(2007)

摘　　要：连续统去除法是简便、准确而有效地提取光谱吸收特征参数的方法之一。为此,研究利用ASD FieldSpec Pro地物光谱仪在自然环境条件下对不同有机质含量的土壤样本进行光谱测量,提取特征吸收面积来评价与有机质含量的关系,发现基于包含有机质含量敏感波段在内的450～580nm波段范围特征吸收面积建立的有机质含量对数诊断模型预测精度较高。结果表明,土壤有机质吸收特征参数估算模型为土壤肥力的快速测定提供了新的途径。TContinuum-removal is an effective method in soil spectral analysis. In this study,the spectra of soils samples were measured by an ASD PRO FR2500 in the 350~2500nm regions in the field.Then the hyperspectral reflectance data were transformed to absorption spectra.According to the result of the regression analysis,it is observed that there is a strong absorption around 511 nm due to organic matter. Based on the absorption area in the 450~580 nm regions,the content of organic matter is calculated accurately. The retrieval model of the absorption spectra area provides a new approach to the soil fertility monitoring.

关 键 词：土壤 有机质 高光谱 吸收特征参数 连续统去除 

分 类 号：S158.2[农业科学—土壤学]