Spectral Characterization and N Content Prediction of Soil with Different Particle Size and Moisture Content
BAO Yi-dan1,HE Yong1,FANG Hui1*,Annia Garcia Pereira1，2
1. College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China 2. Mechanization Faculty, Havana Agricultural University, Cuba
Abstract：The present work was focused on analyzing the influence of moisture content, particle size, light source incidence angle and observation height on a loamy mixed soil spectra. Meanwhile, prediction models for N content with different moisture and particle sizes were obtained, and the influence of these properties on N prediction was studied. The future applicability of NIR spectroscopy as a technique able to make prediction on the spot was analyzed. Observation height 100 mm and light source angle 45° were chosen to present a sharpest spectra. Moisture content and particle size were found to affect strongly the absorbance of the spectra, and an accurate N prediction was obtained when the particle sizes varied from 0.5-1.0，1.0-2.0 and 2-5 mm with r of 0.82，0.81 and 0.81, respectively. Poor N prediction was obtained when the soil kept its natural moisture with r of 0.57 and SECV of 3.06 compared with the performance when it was dry with r of 0.81 and SECV of 2.40.
鲍一丹1,何勇1,方慧1*,Annia Garcia Pereira1，2 . 土壤的光谱特征及氮含量的预测研究[J]. 光谱学与光谱分析, 2007, 27(01): 62-65.
BAO Yi-dan1,HE Yong1,FANG Hui1*,Annia Garcia Pereira1，2 . Spectral Characterization and N Content Prediction of Soil with Different Particle Size and Moisture Content . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(01): 62-65.
[1] Ben-Dor E, Banin A. Soil Sci. Soc. Am. J., 1995，59: 364. [2] HE Xu-sheng(何绪生). Review of China Agricultural Science and Technology(中国农业科技导报), 2004，6(4): 71. [3] WANG Duo-jia, ZHOU Xiang-yang, JIN Tong-ming, et al(王多加, 周向阳, 金同铭, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2004, 24(4): 447. [4] Williams P, Norris K H. Near-Infrared Technology in the Agriculture and Food Industries, 2nd Edition, St. Paul: The American Association of Cereal Chemists. 2001(Chapter 9). [5] XU Guang-tong, YUAN Hong-fu, LU Wan-zhen(徐广通, 袁洪福, 陆婉珍). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2000, 20(2): 134. [6] Dalal R C, Henry R J. Soil Sci. Soc. Am. J., 1986, 50: 120. [7] Krisnan P J, Alexandes D, Butler B J. Soil Sci. Am. J., 1980, 44: 1282. [8] Fox R H, Shenk J S, Piekielek W P, et al. Agronomy Journal, 1993, 85: 1049. [9] Lobell D B, Asner G P. Soil Science Society of America Journal, 2002, 66: 722. [10] SUN Jian-ying, LI Min-zan, ZHENG Li-hua, et al(孙建英，李民赞，郑立华，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2006，26(3)：426.
