COMPARISON OF ORAL AND DUODENAL ADMINISTRATION OF SUNFLOWER SEED OIL AND SOYBEAN PROTEIN TO SHEEP

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Abstract
Two supplements, sunflower seed oil and purified soybean protein, and two routes of administration, oral and infusion into the duodenum, were used in Latin square design experiments to determine nutrient digestibility and nitrogen balance. The design provided for four treatments: oral oil–oral protein, oral oil–duodenal protein, duodenal oil–oral protein, and duodenal oil–duodenal protein.Oral, in comparison to duodenal, administration of oil resulted in lower digestibility of crude fiber, higher digestibility of fat, and higher; nitrogen retention; these effects were independent of the route of protein administration. The only significant treatment effect for route of protein administration was higher fermentation rate of rumen contents in the oral protein–oral oil treatment.