Pedosphere 13(3): 193--198, 2003
ISSN 1002-0160/CN 32-1315/P
©2003 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Physico-chemical properties and laboratory hyperspectral reflectance of coastal saline soil in Shangyu city of Zhejiang province, China |
| SHI Zhou, HUANG Ming-Xiang and LI Yan |
| Institute of Agricultural Remote Sensing and Information System, Zhejiang University, Hangzhou 310029 (China) |
| ABSTRACT |
| 45 and 50 composite soil samples were collected, respectively, from two agricultural fields, that were enclosed and reclaimed from coastal tidal-flat areas in 1996 and 1984 respectively, in Shangyu of Zhejiang Province, China, to investigate the physico-chemical properties and the hyperspectral characteristics of the saline soils and to make an assessment on their relationships. The reflectance spectra of saline soils were measured using a spectroradiometer in laboratory. The mean spectral curves of the saline soils from the two sites different in reclamation year showed that the saline soil taken from the recently reclaimed land with higher salinity demonstrated a lower reflectance intensity in the spectral region from about 550 nm to 2300 nm. In addition, nine absorption bands, i.e., 488 nm, 530 nm, 670 nm, 880 nm, 940 nm, 1400 nm, 1900 nm, 2 200 nm and 2 300 nm, were chosen as the spectral bands to investigate the relationships between soil physico-chemical properties by means of Pearson correlation analysis. Finally, the first two principal components were calculated from nine absorption bands and used to discriminate the saline soil samples taken from two sampled fields. The results indicate that it is feasible to detect physico-chemical properties of saline soils from fields reclaimed for varying time periods on the basis of the hyperspectral data. |
| Key Words: coast, hyperspectral, reclamation, saline soils |
| Citation: Shi, Z., Huang, M. X. and Li, Y. 2003. Physico-chemical properties and laboratory hyperspectral reflectance of coastal saline soil in Shangyu city of Zhejiang province, China. Pedosphere. 13(3): 193-198. |
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