Detection of nitrogen status in FCV tobacco leaves with the spectral reflectance

Tobacco (Nicotiana tabacum L.) Leaf requires proper management of N fertilizer. Diagnostic methods of leaf optical properties can aid non-destruction and prompt N Fertilization management decision. A factorial treatment arrangement of N( 0,60,81,102,123,and 150Kg N ha-1)was used to study N concentration of leaf and associated spectral properties at Zhenzhou, China. A wide range of spectral reflectance measures (350-2500nm) were obtained from each plot using a ASD FieldSpec Pro 2500. At each reading data, single band and combination indices were generated to test for correlation with N concentration of leaf. For this study, Maximum first derivate value in the green, Normalized difference between the maximum in the green and red edge, Normalized difference between the 570nm and 670nm(NRI), ratio of second derivative value at 712nm and first derivative at 688nm, value of the first derivate value at 2160nm were significant. After testing and calibration, these may prove useful in predicting N concentration of leaf. This electronic document is a “live” template. The various components of your paper [title, text, heads, etc.] are already defined on the style sheet, as illustrated by the portions given in this document. KeywordsSpectral Reflectance; nitrogen; FCV tobacco; ground remote sensing ; spectra detection