Comparison of methods of estimating the digestibility of range forage and browse. Wilson, A. D., Weir, W. C., & Torell, D. T. J. Anim. Sci., 32(5):1046–1050, 1971. abstract bibtex Abstract: The apparent digestibility of grass, grass-clover, chamise (Adenostoma fasciculatum) and interior live oak (Quercus wislizenii) range, as grazed by sheep on three occasions, was determined by lignin ratio, two-stage in vitro digestion, in vitro digestion of cell walls, summative equation, and fecal nitrogen. For the grass and grass-clover range, dry matter digestibilities were 60% or higher and general agreement was obtained between methods. For the browse forages, dry matter digestibilities were within the range 40% to 60% or higher and there was less agreement between methods. Lignin ratio gave consistently low and fecal nitrogen consistent high estimates of digestibility. The two-stage in vitro procedure gave slightly lower estimates than the cell wall in vitro procedure and the summative equation. The use of standard or permanganate methods of lignin analysis gave less reliable estimates of digestibility than did the acid-detergent method.
@article{wilson_comparison_1971,
title = {Comparison of methods of estimating the digestibility of range forage and browse},
volume = {32},
shorttitle = {Comparison of methods of estimating the digestibility of range forage and browse},
abstract = {Abstract: The apparent digestibility of grass, grass-clover, chamise (Adenostoma fasciculatum) and interior live oak (Quercus wislizenii) range, as grazed by sheep on three occasions, was determined by lignin ratio, two-stage in vitro digestion, in vitro digestion of cell walls, summative equation, and fecal nitrogen. For the grass and grass-clover range, dry matter digestibilities were 60\% or higher and general agreement was obtained between methods. For the browse forages, dry matter digestibilities were within the range 40\% to 60\% or higher and there was less agreement between methods. Lignin ratio gave consistently low and fecal nitrogen consistent high estimates of digestibility. The two-stage in vitro procedure gave slightly lower estimates than the cell wall in vitro procedure and the summative equation. The use of standard or permanganate methods of lignin analysis gave less reliable estimates of digestibility than did the acid-detergent method.},
number = {5},
journal = {J. Anim. Sci.},
author = {Wilson, A. D. and Weir, William C. and Torell, Donald T.},
year = {1971},
keywords = {1971, Torell, D. T., Weir, W. C., Wilson, A. D., chamise, digestibility, dry matter, digestibility, forage, digestibility, in vitro, fecal nitrogen, lignin ratio technique, nitrogen, fecal, oak, interior live, sheep, diet},
pages = {1046--1050}
}
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