Details

Autor(en) / Beteiligte

• Norman, R.C
• Coblentz, W.K
• Hubbell, D.S. III
• Ogden, R.K
• Coffey, K.P
• Caldwell, J.D
• Rhein, R.T
• West, C.P
• Rosenkrans, C.F. Jr

Titel

Effects of Storage Conditions on the Forage Quality Characteristics and Ergovaline Content of Endophyte-Infected Tall Fescue Hays

Ist Teil von

• Crop science, 2007-07, Vol.47 (4), p.1635-1646

Ort / Verlag

Madison, WI: Crop Science Society of America

Erscheinungsjahr

2007

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Throughout the southern Ozark Highlands, endophyte-infected tall fescue [Lolium arundinaceum (Schreb.) Darbysh] hay often is stored outdoors, without cover. At two research sites (Fayetteville and Batesville, AR), the effects of unprotected storage were assessed for large round bales of tall fescue hay packaged at three diameters (approximately equal to 1.1, 1.4, and 1.7 m). Bales were stored over winter either inside or outside on wooden pallets and then sampled at three depths (0-0.15 m, 0.15-0.31 m, and 0.31-0.46 m). At both locations, bale diameter had no effect (p > 0.05) on dry matter (DM) recovery or nutritive value. Generally, there was little deterioration of nutritive value during the storage period, regardless of treatment; however, some interactions (p <or= 0.041) of storage location and sampling depth were observed at each experimental site. Ruminal disappearance kinetics of DM exhibited some statistical differences (p <or= 0.030) in response to treatment; however, their relative magnitude was generally small, and there was little evidence to suggest biological relevance. After storage, concentrations of ergovaline were not affected (p > 0.05) by baling treatment at Batesville (overall mean 256 microgram kg-1); however, this was a 27.3% reduction from the initial concentration immediately after mowing. At Fayetteville this reduction was even greater, falling by 79.4% between standing forage (539 microgram kg-1) and samples taken from baled hay after storage (111 microgram kg-1). At both sites, bales stored outside on wooden pallets exhibited relatively small changes in nutritive value, disappearance kinetics, and ergovaline at the bale surface relative to the internal portions of the bale.