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Near Infrared Reflectance Analysis of Total Nonstructural Carbohydrate Concentration in Tropical Grasses 1
Author(s) -
Brown W. F.,
Piacitelli C. K.,
Mislevy P.
Publication year - 1987
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1987.0011183x002700040036x
Subject(s) - cynodon , biology , digitaria , near infrared reflectance spectroscopy , zoology , dry matter , near infrared spectroscopy , agronomy , veterinary medicine , neuroscience , medicine
Near infrared reflectance spectroscopy (NIRS) has been used for the rapid chemical analysis of feed. This research investigated the use of NIRS to analyze total nonstructural carbohydrate (TNC) concentration in stem bases and roots of Cynodon, Hemarthria, Digitaria , and Paspalum tropical grasses from six experiments. Conventional TNC analysis was conducted and NIRS equations were developed from selected samples (85–280) representing all treatments evaluated in an experiment. Standard errors of calibration and analysis ranged from 11.3 to 18.7 g kg ‐1 dry matter (DM). Coefficients of determination via NIRS ranged from 0.53 to 0.92. Mean biases ranged from −1.5 to 4.4 g kg ‐1 DM. A subset of samples representing all treatments evaluated in each experiment was selected to develop a general NIRS‐TNC equation. Validation results were similar to those from each experiment, indicating that a general NIRS‐TNC equation could analyze TNC concentration of a specific group of samples with the same accuracy as an equation developed from that specific group.