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http://dx.doi.org/10.5333/KGFS.2011.31.4.415

Evaluation of Field Application of Portable Near Infrared Reflectance Spectrometer (NIRS) for Quality Evaluation of Italian Ryegrass Silages  

Park, Hyung-Soo (National Institute of Animal Science RDA)
Lee, Sang-Hoon (National Institute of Animal Science RDA)
Kim, Jong-Gun (National Institute of Animal Science RDA)
Choi, Ki-Choon (National Institute of Animal Science RDA)
Seo, Sung (National Institute of Animal Science RDA)
Kim, Won-Ho (National Institute of Animal Science RDA)
Lee, Hyo-Won (Korea National Open University)
Lim, Young-Chul (National Institute of Animal Science RDA)
Publication Information
Journal of The Korean Society of Grassland and Forage Science / v.31, no.4, 2011 , pp. 415-422 More about this Journal
Abstract
This study evaluated the feasibility of using a portable near infrared reflectance spectrometer working in the 900~1,600 nm range for the measurement of quality-related parameters (moisture, pH, Acid detergent fiber (ADF), Neutral detergent fiber (NDF), Crude protein (CP), lactic acid) in intact silage. The calibration result for the Phazir (handheld, Polychromix) was compared with the result for the Spectrastar (Lab. based, Unity). A total of 67 Italian ryegrass silages were used to build calibration models using different spectral signal pre-treatments and the partial least squares regression (PLS) method. The good calibration statistics in two instruments was obtained for moisture content of Italian ryegrass silages with over $R^2$ = 0.95. The Phazir spectrometer was less accurate in measuring of ADF, NDF and CP contents. The Spectrastar instrument yielded greater precision for pH and lactic acid content; statistic values were over $R^2$ = 0.82 and the standard error of calibration (SEC) = 0.21% and 0.24%. Thus, the NIR measurement of forage quality in the field by portable NIR analyzers was shown not to be feasible, but additional investigations are required to discern the key instrumental and operational parameters that may influence the portable NIR measurement.
Keywords
NIRS; Forage quality; Portable NIRS; Field application;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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