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    • IJAFR, Volume 53, number 2, 2014
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    • Irish Journal of Agricultural & Food Research
    • IJAFR, Volume 53, number 2, 2014
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    A note on the comparison of three near infrared reflectance spectroscopy calibration strategies for assessing herbage quality of ryegrass

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    Author
    Burns, G. A.
    O'Kiely, Padraig
    Grogan, D.
    Gilliland, T. J.
    Keyword
    Calibration strategy
    Near infrared reflectance spectroscopy
    Quality
    Ryegrass
    Date
    2014
    
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    URI
    http://hdl.handle.net/11019/762
    Citation
    G.A. Burns, P. O’Kiely, D. Grogan and T.J. Gilliland. A note on the comparison of three near infrared reflectance spectroscopy calibration strategies for assessing herbage quality of ryegrass. Irish Journal of Agricultural and Food Research, 2014, 53: 199–204
    Abstract
    Perennial ryegrass (n = 1,836), Italian ryegrass (n = 137) and hybrid ryegrass (n = 103) herbage was taken from harvested plots from the Irish national variety evaluation scheme and analysed for in vitro dry matter digestibility, water soluble carbohydrate concentration, crude protein concentration and buffering capacity. Spectral data were obtained using near infrared reflectance spectroscopy and three calibration strategies (global, species-specific or local) were utilised to relate the reference values to the spectral data. The local strategy generally provided the poorest estimation of herbage composition, with global and species-specific calibration strategies producing similarly accurate estimates of each quality trait. The higher accuracy and easier maintenance of the global strategy make it the recommended calibration method for analysing quality of ryegrass.
    Funder
    Department of Agriculture, Food and the Marine
    Grant Number
    RSF 07 526
    Collections
    Grassland Science
    IJAFR, Volume 53, number 2, 2014

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