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Roughage Content and Particle Size: Their Effects on Size Reduction and Fiber Composition of Particles Passing Through the Gastrointestinal Tract of Sheep fed Corncob-Concentrate Diets

Roughage Content and Particle Size: Their Effects on Size Reduction and Fiber Composition of Particles Passing Through the Gastrointestinal Tract of S

Roughage Content and Particle Size: Their Effects on Size Reduction and Fiber Composition of Particles Passing Through the Gastrointestinal Tract of Sheep fed Corncob-Concentrate Diets   (Citations: 13)
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ABSTRACT Pelleted diets varying,either in content of corncobs (45.1, 35.1, 25.1, or 15.1% of the diet) or in fineness of grind of the corncob fraction (6.5, 5.4, 1.4, or .8 mm mean particle size) were fed to ruminal-, duodenal-, and ileal-cannulated sheep to evaluate,changes of digesta mean,particle size and,fiber composition,with,passage of diets through,the gastrointestinal tract. As diets decreased,in quantity,of corn- cobs,(Experiment,1) or in mean,particle size of the corncob,fraction (Experiment 2), mean particle size of diet also de- creased. Percentage,dietary,corncobs,in- fluenced,fecal mean,particle size (higher percentage,corncobs,in diets resulted,in larger,fecal mean,particle,sizes). Fecal mean,particle size was,not,affected,by mean,particle size of the corncob,fraction of the diet (Experiment,2). In both,ex- periments, fiber concentration decreased as feed, digesta, and fecal particles de- creased,in size. The only,exception,was acid,detergent,lignin content,of digesta and,fecal particles where,concentration decreased,and,then,increased,as particle
Journal: Journal of Dairy Science - J DAIRY SCI , vol. 68, no. 6, pp. 1363-1375, 1985
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