[1]WU Yajuan,LIU Tingxi,TONG Xin,et al.Hyperspectral Characteristics of Artemisia halodeudrou Communities in Different Succession Stages in Horqin Sandy Land[J].Research of Soil and Water Conservation,2020,27(06):160-167.
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Hyperspectral Characteristics of Artemisia halodeudrou Communities in Different Succession Stages in Horqin Sandy Land
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 06
Page number:
160-167
Column:
目次
Public date:
2020-10-20
- Title:
- Hyperspectral Characteristics of Artemisia halodeudrou Communities in Different Succession Stages in Horqin Sandy Land
- Keywords:
- Artemisia halodeudrou; community succession; continuum removal; first derivation; Mahalanobis distance
- CLC:
- Q145; TP7
- DOI:
- -
- Abstract:
- As one of the main vegetation community species in arid and semi-arid areas, the rapid and accurate identification of Artemisia halodeudrou is beneficial to the effective utilization of vegetation resources in alpine areas. In order to study the sustainable utilization of vegetation resources in arid and semi-arid areas, the main objective of this study is to study the species diversity of Artemisia halodeudrou in Horqin Sandy Land. The community succession of Artemisia halodeudrou succession was divided into four stages and the characteristics of ‘same subject with different spectra' were studied. The method of continuum removal and first derivative reflectance were used to deal with the original spectral data. The Mahalanobis distance method was used to determine the significant difference between the original spectrum and the transform spectrum. The results showed that: at the same time, with the succession of Artemisia communities, the reflectivity of red edge continued to rise; in September, the community entered the wilting period, and the overall curve was lower than that in May; compared the spectral characteristics of Artemisia communities at different succession stages after first derivative transformation and continuum removal, the first derivative spectrum of the community showed significant differences in peak, peak shape and absorption peak positions; red edge and absorption depth could be used for recognition, and the best time for recognition was September; Mahalanobis distance could scientifically and quickly extract characteristic bands with significant differences between communities; the dimensional reduction effect was achieved by spectral transformation, and the recognition accuracy was improved; among them, the dimension reduction effect of the first derivative transformation in September was the best, and the identification effect was the best. The first derivative method and continuum removal method were used to weaken the influence of soil background, and provided the better method to enhance the reflectance characteristics and the difference of characteristic bands; at the same time, Mahalanobis distance range could express the positions of bands with significant differences under different spectral transforms, which was helpful to study vegetation identification in arid and semi-arid areas.
- References:
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Last Update:
2020-10-20