2016/02/16 by Jingzhong Li, Yongmei Liu, Chonghui Mo +3 · 1 citation
Agricultural and Biological Sciences · Environmental Science · #Biology #Botany #Environmental science #Ethnobotanical and Medicinal Plants Studies #Geography #Leaf area index #Multispectral image #Normalized Difference Vegetation Index #Phytochemistry and Biological Activities #Remote Sensing in Agriculture #Remote sensing
paper · pdf · doi:10.3390/rs8020148
openalex publication_date 2016/02/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/22
Stellera chamaejasme L. (S. chamaejasme) is one of the primary toxic grass species (poisonous plants) distributed in the alpine meadows of Qinghai Province, China. In this study, according to the distinctive phenological characteristics of S. chamaejasme, the spectral differences between S. chamaejasme in the full-bloom stage and other pasture grasses were analyzed and the red, blue, and near-infrared bands of IKONOS image were determined as the diagnostic bands of S. chamaejasme recognition. Feature indexes related to S. chamaejasme were established using the diagnostic bands, and \(NDVIblue = (ρnir − ρblue)/(ρnir + ρblue)\) obtained as S. chamaejasme sensitive index based on the linear regression analysis between the indexes derived from field spectra and the actual cover fraction of S. chamaejasme communities. The distribution area of S. chamaejasme was extracted by using the index \(NDVIblue\) derived from IKONOS multispectral image in Qilian County of Qinghai Province, China and the verified result reached an overall accuracy of 90.71%. The study indicated that high resolution multispectral satellite images (such as IKONOS images) had significant potential in remote sensing recognition of toxic grass species.