Mid-infrared and near-infrared calibrations for nutritional parameters of Triticale (Triticosecale) and pea (Pisum sativum)

The objective of this study was to develop Fourier transformed mid-infrared (MidIR) and near-infrared (NIR) calibrations for acid detergent fiber (ADF), neutral detergent fiber (NDF), and total nitrogen in triticale, peas, and triticale/pea mixtures. Heterogeneous calibration-validation combinations...

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Bibliographic Details
Published in:Journal of agricultural and food chemistry Vol. 57; no. 12; p. 5136
Main Authors: Calderón, Francisco J, Vigil, Merle F, Reeves, 3rd, James B, Poss, David J
Format: Journal Article
Language:English
Published: United States 24.06.2009
Subjects:
Calibration
Edible Grain - chemistry
Nutritive Value
Pisum sativum - chemistry
Spectrophotometry, Infrared - methods
Spectroscopy, Fourier Transform Infrared - methods
ISSN:1520-5118, 1520-5118
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Summary:The objective of this study was to develop Fourier transformed mid-infrared (MidIR) and near-infrared (NIR) calibrations for acid detergent fiber (ADF), neutral detergent fiber (NDF), and total nitrogen in triticale, peas, and triticale/pea mixtures. Heterogeneous calibration-validation combinations were also tested for calibration quality. The forage samples were collected from forage plots grown following millet or wheat. Other factors included population density, forage mixtures, and nitrogen fertilizer rate. Total N always achieved a better validation R(2) than ADF and NDF, regardless of the sample set or spectral range. The ADF and NDF could not be predicted well with heterogeneous calibration/validation sets, with the exception of ADF predicted by the pea/triticale mixture in the MidIR. Using whole sample sets resulted in better predictive calibrations for the fiber analytes for both the MidIR and the NIR. This study shows that MidIR compares well with NIR for the development of ADF and total N calibrations in forages. The NIR and MidIR are both useful as quick methods for measuring total N, and they show promise for measuring ADF and total N in forage samples, but performance with NDF was less satisfactory.
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ISSN:1520-5118
1520-5118
DOI:10.1021/jf803936x