Effects of Alkaline Hydrogen Peroxide Treatment of Wheat Straw on Site and Extent of Digestion in Sheep

摘要: Two experiments (4 X 4 Latin squares) were conducted, using four multiple-cannulated wethers (mean body weight, 65 kg), to determine effects of treating wheat straw (WS) with alkaline solutions (pH 11.5) hydrogen peroxide (AHP; .26 g peroxide/g WS) on site and extent nutrient digestion in sheep. Diets contained either 33 37% (low or 70 72% (high AHP-treated (T) non-treated (C) WS. Treatment WS AHP resulted increased acid detergent fiber cellulose concentrations decreased lignin (ADL) compared In Exp. 1, intakes held constant at approximately 1,044 dry matter (DM)/d. When fed diets, digested more (P less than .05) DM, neutral (NDF) the stomach (54.8, 47.4, 51.6 20.0%; 65.6, 68.8, 51.5 37.2%; 66.6, 74.2, 45.2 40.7% intake, respectively, for low WS-T, high WS-C diets) total tract (83.0, 74.8, 68.4 50.0%; 81.8, 81.0, 53.9 42.1%; 85.2, 86.9, 50.2 47.6%, diets), had lower ruminal pH when diets. 2, same diets similar those but ad libitum intake. Wethers consumed feed diet other three (2,234, 2,526, 2,271 1,297 g/d respectively). Digestibilities NDF higher sheep treated (82.7, 70.7, 58.0%; 78.6, 72.9, 49.4 51.6%; 78.0, 84.0, 53.8 37.5%, diets). Fluid particulate dilution rates rumen .08) (8.21, 8.56, 6.96 6.81%/h; 6.06, 6.73, 4.05 3.15%/h, The treatment was successful overcoming major barriers microbial degradation gastrointestinal wethers.