Predicción de la composición química y fibra detergente neutro de rye grass italiano (Lolium multiflorum Lam) mediante espectroscopía de reflectancia en infrarrojo cercano (NIRS)

Translated title of the contribution: Prediction of chemical composition and neutral detergent fibre of Italian ryegrass (Lolium multiflorum lam) by near infrared spectroscopy (NIRS)

Bezada Q. Sandra, Arbaiza F. Teresa, Fernando Demetrio Carcelen Caceres, Felipe Antonio San Martin Howard, López L. Christian, Rojas E. Jean, Rivadeneira Virginia, Espezúa F. Oscar, Jorge Ernesto Guevara Vasquez, Vélez M. Víctor

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5 Scopus citations

Abstract

The aim of this study was to generate calibration equations to predict the nutritional chemical composition of the Italian rye grass (RG) (Lolium multiflorum Lam) by near infrared spectroscopy (NIRS). A total of 75 samples of RG of different harvesting weeks were collected from the IVITA Research Center in Huancayo (Peru). Spectrum capture was performed using NIRS and the chemical analysis was done for reference of the following components: crude protein (CP), ether extract (EE), total ash (CZ), crude fibre (CF) and neutral detergent fibre (NDF). A calibration and validation model by partial least squares (PLS) was developed and the correlation coefficient (R), coefficient of determination (R2), root mean square error of calibration (RMSEC), root mean square error of prediction (RMSEP), ratio range with error (RER) and residual predictive deviation (RPD) were used as statistics of accuracy and precision. Proximate analysis means were: PC = 19.02%, EE = 4.53%, CZ = 12.79%, FC = 16.50% and NDF 60.98%. High values of R2 and low values of RMSEC and RMSEP were obtained for PC (0.96, 1.02, 1.19), EE (0.94, 0.29, 1.05), CZ (0.90, 0.57, 0.92) and NDF (0.90, 1.01, 1.25, respectively). The largest RER (22.34) and RPD (4.90) were obtained for EE. It is concluded that the calibration and validation equations obtained by NIRS enable optimal quantitative prediction of PC, EE, CZ and NDF in Italian rye grass (Lolium multiflorum Lam).

Translated title of the contributionPrediction of chemical composition and neutral detergent fibre of Italian ryegrass (Lolium multiflorum lam) by near infrared spectroscopy (NIRS)
Original languageSpanish
Pages (from-to)538-548
Number of pages11
JournalRevista de Investigaciones Veterinarias del Peru
Volume28
Issue number3
DOIs
StatePublished - 1 Jul 2017
Externally publishedYes

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