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Protein, Crude Fiber, Tannin, and Oxalate Concentrations of Some Introduced Astragalus Species 1
Author(s) -
Davis A. M.
Publication year - 1973
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1973.00021962006500040025x
Subject(s) - tannin , medicago sativa , forage , oxalate , biology , botany , fiber , condensed tannin , medicago , hay , neutral detergent fiber , astragalus , horticulture , chemistry , proanthocyanidin , biochemistry , medicine , polyphenol , alternative medicine , organic chemistry , traditional chinese medicine , pathology , gene , antioxidant
A collection of Astragalus accessions was grown for seed increase and preliminary evaluation at Wawawai, Washington. This presented a unique opportunity to evaluate them for forage quality components. Those selected were: concentration of protein (N ✕ 6.25), crude fiber, tannin, and oxalate; and presence or absence of alkaloids. Analyses of the 46 Astragalus accessions, representing 33 species and four unidentified accessions, showed a ranged of 9.8 to 21.7% protein, 15.5 to 33.9% crude fiber, .05 to 20.3 mg/g tannin and .44 to 2.66% oxalates. Species with more than 18% protein and less than 28% crude fiber (i.e., equal to good alfalfa ( Medicago sativa L.) hay) and acceptable levels of oxalates and tannins were: A coluteocarpus Boiss., A. dactylocarpus Boiss., A. galegiformis L., A. peduncularis Royle, A. tephrosioides Boiss., and one unidentified accession (P. I. 314361). The only species having measurable amounts of alkaloids was A. calycinus Bieb.