Effect of the esophageal fistula on chemical composition of feeds

TitleEffect of the esophageal fistula on chemical composition of feeds
Publication TypeConference Paper
Year of Publication1968
AuthorsKiesling H.E., Nelson A.B., Herbel C.H.
Conference NameJournal of Animal Science
Date Published1968
Keywordschemical composition, esophageal fistula, feeds
AbstractOrganic matter recovery of seven feeds collected through esophageal fistulae of three steers varied from 87.5 to 95.2% and averaged 90.4%. The seven feeds were alfalfa hay, tobosa hay, 70% alfalfa-30% milo pellet, 20% alfalfa-80% concentrate mixture, 20% cottonseed hulls-80% concentrate mixture, ground milo and cottonseed meal. The fistual samples were significantly higher in ash for all feeds except cottonseed meal, higher in protein for ground milo and higher in A.O.A.C. fiber for alfalfa hay; but, they were lower in ether extract for the alfalfa-milo pellet, alfalfa-concentrate mixture, cottonseed hulls-concentrate mixture and ground milo, and lower in A.O.A.C. fiber for tobosa hay. Fistula samples of grazed forage contained significantly more silica, ash, protein, ether extract, detergent fiber and detergent lignin but less A.O.A.C. fiber than hand-plucked samples obtained from seven pastures of tobosa [Hilaria mutica (Buckl.) Benth.]. Because of relatively high silica content of the samples (8.0%), chemical composition was compared on a silica-free basis. There were seven pastsure treatments and pasture differences were significant for all constituents except ash. Pasture x method interaction was significant for ash and protein. Detergent fiber was significantly higher than A.O.A.C. fiber for both hand-plucked and fistula samples in all pastures.