02004naa a2200205 a 450000100080000000500110000800800410001902400420006010000180010224501090012026000090022950001120023852012570035065300270160765300090163465300260164365300190166970000140168877300960170210495672019-09-30       2004    bl uuuu     u00u1 u    #d7 a10.1016/j.anifeedsci.2003.08.0012DOI1 aCOZZOLINO, D.  aExploring the use of near infrared reflectance spectroscopy (NIRS) to predict trace minerals in legumes.  c2004  aArticle history: Received 28 January 2003 / Received in revised form 23 July 2003 / Accepted 5 August 2003.  aAbstract: The use of near infrared reflectance spectroscopy (NIRS) was explored to predict trace mineral concentrations in two legumes. Samples (332), composite of white clover (n=97) and lucerne (n=235), from different locations in Uruguay representing a wide range of soil types, were analysed for sodium (Na), sulphur (S), copper (Cu), iron (Fe), manganese (Mn), zinc (Zn), and boron (B). The samples were scanned in reflectance in a monochromator instrument (400?2500 nm). Calibration models (n=262) were developed using modified partial least squares regression (MPLS) based on cross-validation and tested using a validation set (n=70). Two mathematical treatments of the spectra were compared (first and second derivative). The highest coefficients of determination in calibration (RCAL2) and the lowest standard errors of cross-validation (SECV) were obtained using second derivative. The RCAL2 and SECV were 0.83 (SECV: 0.8) for Na and 0.86 (SECV: 2.5) for S in g kg?1 DM; 0.80 (SECV: 4.4), 0.80 (SECV: 10.6), 0.78 (SECV: 22.9), 0.76 (SECV: 0.83) and 0.57 (SECV 25.7) for B, Zn, Mn, Cu and Fe in mg kg?1 DM on a dry weight, respectively. Sulphur (SEP: 5.5), sodium (SEP: 1.2) and boron (SEP 4.2) were well predicted by NIRS on a validation set.  aLEGUMES FORAGE QUALITY  aNIRS  aPARTIAL LEAST SQUARES  aTRACE MINERALS1 aMORON, A.  tAnimal Feed Science and Technology, Volume 111, Issues 1?4, 12 January 2004, Pages 161-173.