文献类型： 会议论文

第一作者： S. W. I Made Anom

作者： S. W. I Made Anom ¹ ; S. Shibusawa ¹ ; A. Sasao ¹ ; K. Sakai ¹ ; H. Sato ¹ ; S. Hirako ² ; S. Blackmore ³ ;

作者机构： 1.Faculty of Agriculture Tokyo University of Agriculture and Technology Fuchu, Tokyo, Japan

2.Omron Institute of Life Science Co. Ltd. Kyoto, Japan

3.Department of Agricultural ScienceThe Royal Veterinary and Agricultural University Taastrup, Denmark

关键词： Spatial variability;soil parameters;real-time spectrophotometer

会议名称： International Conference on Precision Agriculture

主办单位：

页码： 245/1-245/17

摘要： Soil reflectance, within the wavelength range 400 nm to 1700 nm, was collected using the real-time soil spectrophotometer, and investigated to describe the soil parameter variability in the field. The sub-soil images were also recorded to study the relation between image feature and soil reflectance. Moving average smoothing, Kubelka-Munk transformation and multiple scatter correction were applied to the soil reflectance; and correlation analyses and stepwise multi linear regressions were carried outto the original, the 1st derivative and the 2nd derivative. The RGB and H.S.I analyses were carried out on the sub-soil images. The results indicated that the derivative increased the correlation, and the 2nd derivative gave the best prediction in determination of the soil parameters. Correlation was found between image features and soil reflectance or soil parameters, but the correlation coefficients were relatively low and the correlation depended on the soil type. The soil parameter maps describingthe variability distribution in the field had been generated by block kriging with the 2nd derivative spectral reflectance.

分类号： S-794