Abstract：Different textured soils (sandy loam, silty clay loam and clay) from Manas County, Xinjiang were researched with indoor spectral reflectance, continuum removal was used to process soil spectra curve, and correlation analysis was made about normalized spectral reflectance and water content for modeling. The results show that different textured soils have reflectance in a order that clay>silty clay loam>sandy loam; the critical points of field capacity in sandy loam, silty clay loam and clay were 20.01%, 24.10% and 30.43% respectively, and water content was inversely proportional to spectral reflectance below such critical points while proportional above the points. Within 1 390～1 623 nm band, the negative correlation coefficients of soil water content and normalized spectra reflectance show better negative correlation and reaching significant levels, R2 of the model established for soil water content prediction exceeded mostly 0.8, and the average relative error of the model was 10%. The model could accurately reflect the soil moisture content, Its advantages such as accuracy, non-destruction and rapidness provide a new approach to measuring soil water content.
李美婷，武红旗，蒋平安*，卢响军，付彦博 . 利用土壤的近红外光谱特征测定土壤含水量[J]. 光谱学与光谱分析, 2012, 32(08): 2117-2121.
LI Mei-ting, WU Hong-qi, JIANG Ping-an*, LU Xiang-jun, FU Yan-bo . Measuring Soil Water Content by Using Near Infrared Spectral Characteristics of Soil. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(08): 2117-2121.
[1] TONG Qing-xi, ZHANG Bing, ZHENG Lan-fen(童庆禧, 张 兵, 郑兰芬). Hyperspectral Remote Sensing(高光谱遥感), 2006, 3. [2] Bowers S A, Smith S J. Soil Sci., 1972, 36: 978. [3] Liu W, Baret F, Gu X, et al. Remote Sens. Environ.，2002, 81(2-3): 238. [4] David B I, Gregory P A. Soll Sci. Soc. An1. J, 2002，66(3)：722. [5] Hummel J W, Sudduth K A, Hollinger S E. Computers and Electronics in Agriculture, 2001, 32: 149. [6] XIE Bo-cheng, XUE Xu-zhang, LIU Wei-dong, et al(谢伯承, 薛绪掌, 刘伟东, 等) . Acta Pedologica Sinica(土壤学报)，2005, 42(1): 171. [7] WU Dai-hui, FAN Wen-jie, CUI Yao-kui, et al(吴代晖, 范闻捷, 崔要奎, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2011, 30(11): 3067. [8] Liu W，Baret F，Gu X，et al. Remote Sens. Environ.，2002，81(2-3)：238. [9] WANG Jing, HE Ting, LI Yu-huan(王 静, 何 挺, 李玉环). Journal of Remote Sensing(遥感学报), 2005, 9(4): 438. [10] HUANG Chang-yong(黄昌勇). Soil Sciences(土壤学), 2000, 5. [11] LI Xiao-yin, BI Hua-xing, DIAO Rui-min, et al(李笑吟, 毕华兴, 刁锐民, 等). Scienc
