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http://dx.doi.org/10.5333/KGFS.2017.37.2.154

Studies on Predicting Chemical Composition of Permanent Pastures in Hilly Grazing Area Using Near-Infrared Spectroscopy  

Park, Hyung-Soo (Grassland & Forage Division, National Institute of Animal Science)
Lee, Hyo-Jin (GEOMEXSOFT., Ltd.)
Lee, Hyo-won (Department of Agriculture, Korea National Open University)
Ko, Han-Jong (Department of Agriculture, Korea National Open University)
Jeong, Jong-Sung (Grassland & Forage Division, National Institute of Animal Science)
Publication Information
Journal of The Korean Society of Grassland and Forage Science / v.37, no.2, 2017 , pp. 154-160 More about this Journal
Abstract
This study was conducted to find out an alternative way of rapid and accurate analysis of chemical composition of permanent pastures in hilly grazing area. Near reflectance infrared spectroscopy (NIRS) was used to evaluate the potential for predicting proximate analysis of permanent pastures in a vegetative stage. 386 pasture samples obtained from hilly grazing area in 2015 and 2016 were scanned for their visible-NIR spectra from 400~2,400nm. 163 samples with different spectral characteristics were selected and analysed for moisture, crude protein (CP), crude ash (CA), acid detergent fiber (ADF) and neutral detergent fiber (NDF). Multiple linear regression was used with wet analysis data and spectra for developing the calibration and validation mode1. Wavelength of 400 to 2500nm and near infrared range with different critical T outlier value 2.5 and 1.5 were used for developing the most suitable equation. The important index in this experiment was SEC and SEP. The $R^2$ value for moisture, CP, CA, CF, Ash, ADF, NDF in calibration set was 0.86, 0.94, 0.91, 0.88, 0.48 and 0.93, respectively. The value in validation set was 0.66, 0.86, 0.83, 0.71, 0.35 and 0.88, respectively. The results of this experiment indicate that NIRS is a reliable analytical method to assess forage quality for CP, CF, NDF except ADF and moisture in permanent pastures when proper samples incorporated into the equation development.
Keywords
Chemical composition; Hilly grazing area; NIRS; Permanent pastures;
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Times Cited By KSCI : 9  (Citation Analysis)
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