Prediction of quality varilables of Vicia species in the field by reflectance measurements

Abstract

Reflectance measurements potentially offer a more rapid and less expensive assessment of growing conditions than traditional chemical analysis using leaf tissue or plant sap. A field experiment was conducted during. 2007-2008 period to investigate relationships between canopy reflectance and nitrogen (N), phosphorus (P), potassium (P), acid detergent fiber (ADF) and neutral detergent fiber (NDF) contents of Vida sativa, Vida pannonica and Vida villosa. Measurements of canopy reflectance were made using a hand-held spectroradiometer. Linear equations between each forage variable and reflectance or first derivatives reflectance had r2 (0.14< r2