Potential of Near-Infrared Reflectance Spectroscopy (NIRS) to Predict Nutrient Composition of Bromus tomentellus

Journal of Rangeland Science

مقاله 4، دوره 2، شماره 4، دی 2012، صفحه 635-641   

نوع مقاله: Research and Full Length Article

نویسندگان

Hossein Arzani¹؛ Anvar Sour^{* 2}؛ Javad Motamedi³

¹Faculty of Natural Resources, University of Tehran

²Range Management, From Natural Resources Faculty University of Tehran

³Department of Natural Resources, University of Urmia

چکیده

Determination of forage quality of available species is one of the fundamental
factors for the management of rangelands. Near-Infrared Reflectance Spectroscopy (NIRS)
was used to analysis the Nitrogen (N), Acid Detergent Fiber (ADF), Dry Matter
Digestibility (DMD) and Metabolizable Energy (ME) content of three phenological stages
(vegetative, flowering and seeding) of Bromus tomentellus samples in grazing pastures of
Iran. The sample set consisted of 40 samples for calibration and 23 samples for validation
was used to prediction N, ADF, DMD and ME, separately. The samples were measured by
reflectance NIR in a 950-1650 nm range. Calibration models between chemical data and
NIR spectra were produced using the method of Partial Least Squares (PLS). The
coefficients of determination (R2) and standard error of cross validation (SECV) were 0.94
(SECV: 0.208%), 0.98 (SECV: 1.76%), 0.98 (SECV: 1.97%), and 0.97 (SECV: 0.34%) for
N, ADF, DMD and ME, respectively. The results obtained from this study indicated that
NIRS had a potentiality to be used in predict the N, ADF, and the estimated DMD and ME
of forage samples content.

کلیدواژه‌ها

Range management؛ Animal nutrition؛ N؛ ADF؛ DMD؛ ME؛ Bromus tomentellus؛ Near-Iinfrared Reflectance Spectroscopy (NIRS)