ORIGINAL PAPER
Prediction of gas production kinetics of maize stover and ear by near infrared reflectance spectroscopy
S. Kruse 1,   A. Herrmann 1  
,   R. Loges 1,   F. Taube 1
 
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Institute of Crop Science and Plant Breeding, Grass and Forage Science/Organic Agriculture, Christian-Albrechts-University Kiel, Olshausenstr. 40, D-24098 Kiel, Germany
CORRESPONDING AUTHOR
A. Herrmann   

Institute of Crop Science and Plant Breeding, Grass and Forage Science/Organic Agriculture, Christian-Albrechts-University Kiel, Olshausenstr. 40, D-24098 Kiel, Germany
Publication date: 2008-06-24
 
J. Anim. Feed Sci. 2008;17(3):422–433
 
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ABSTRACT
This study was conducted to evaluate the potential of NIRS to predict gas production (GP) kinetics for maize ear and stover. Two approaches were applied to characterize GP kinetics: 1. describing GP profiles by fitting an exponential model and 2. by calculating GP for various incubation intervals. In the first approach, NIRS prediction equations could explain a high proportion of variability related to the fermentation rate (c), the asymptotic GP (A), and the lag phase (L) of ear samples in the calibration sub set (R²: 0.81-0.87), while for stover predictive ability was inferior. Validation showed satisfactory results only for the fermentation rate (R²: 0.81-0.88). In the second approach NIRS calibration was acceptable for GP in several incubation intervals, but validation showed satisfactory results for intervals 3-7, 7-12, and 7-16 h of stover samples only (R²>0.74). Further research is required to elucidate potential sources of error before obtaining robust NIRS equations.
 
CITATIONS (1):
1.
Determination of Methane Fermentation Yield and its Kinetics by near Infrared Spectroscopy and Chemical Composition in Maize
Christoph Grieder, Greta Mittweg, Baldev S. Dhillon, Juan M. Montes, Elena Orsini, Albrecht E. Melchinger
Journal of Near Infrared Spectroscopy
 
ISSN:1230-1388