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Forage Preservation Method Influences on Tannin Concentration, Intake, and Digestibility of Sericea Lespedeza by Sheep
Author(s) -
Terrill T. H.,
Windham W. R.,
Hoveland C. S.,
Amos H. E.
Publication year - 1989
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/agronj1989.00021962008100030007x
Subject(s) - lespedeza , tannin , forage , latin square , condensed tannin , hay , chemistry , zoology , neutral detergent fiber , agronomy , lignin , hemicellulose , factorial experiment , food science , biology , rumen , botany , proanthocyanidin , biochemistry , polyphenol , mathematics , fermentation , statistics , antioxidant
Livestock do not like to graze high‐tannin (HT) sericea lespedeza [ Lespedeza cuneata (Dum‐Cours) G. Don], but readily consume it as hay. Intake and digestibility of fresh‐frozen (FF) and field‐dried (FD) HT and low‐tannin (LT) sericea were studied in a feeding trial with sheep (Ovis spp.) in a 2 ✕ 2 factorial with a 4 ✕ 4 Latin square arrangement of treatments. Tannin concentrations were 181,87,31, and 44 g kg ‐1 for HT‐FF, LT‐FF, HT‐FD, and LT‐FD sericea, respectively. There was no difference in digestibility due to preservation method, but HT‐FF was less digestible than LT‐FF [forage ✕ preservation method (P < 0.05)]. Digestibility of neutral detergent fiber, acid detergent fiber, hemicellulose, cellulose, lignin, N, neutral detergent insoluble N, acid detergent insoluble N (ADIN), and intake of HT‐FF sericea were lower than LT‐FF or the FD forages. Decreased intake and digestibility of HT‐FF sericea were related to the high tannin concentration. Elevated fecal recovery of lignin and ADIN in sheep fed HT‐FF forage resulted in negative digestibilities and may be related to formation of insoluble tannin‐protein complexes in the digestive tract. Field drying decreased analyzable tannin concentration in HT sericea.