J. Anim Sci.
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J. Anim Sci. 1970. 31:794-798.
© 1970 American Society of Animal Science
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Effects of Saliva and Drying Temperature on Composition and Digestibility of Forage Samples Collected through Esophageal Fistulas1

K. M. Barth, J. E. Chandler2, M. E. Fryer and H. C. Wang3

University of Tennessee, Knoxville,4

Abstract

Five fresh legume and four fresh grass samples were fed to two esophageal-fistulated steers and collected through the fistulas. Care was taken that the whole sample was consumed, thus preventing selective eating. Replicate samples (control) were not subjected to saliva contamination and were compared with fistula samples in regard to percentage of ash, crude protein, acid-detergent fiber, acid-insoluble lignin and in vitro dry matter digestibility. The effects of drying temperature (45 and 65 C) on chemical constituents and in vitro dry matter digestibility of control and fistula samples were also studied.

Fistula samples were significantly (P<.01) higher in ash (dry matter basis), acid-detergent fiber and acid-insoluble lignin (organic matter basis) than control samples. In vitro dry matter digestibility of only the legume fistula samples was significantly (P<.05) lower than that of the legume control samples when samples were dried at 45 C. At the higher drying temperature (65 C) control samples were significantly (P<.05) higher in acid-insoluble lignin and fistula samples were significantly (P<.05) lower in ash than their respective sample dried at 45 C. Samples obtained from the two esophageal-fistulated steers differed significantly (P<.05) only in percentage of ash and acid insoluble lignin.

Footnotes

1 This manuscript is published with the permission of the Dean of the University of Tennessee Agricultural Experiment Station, Knoxville.

2 Present address: Smith, Cline and French, Chester, Pennslyvania.

3 Present address: International Milling Company, New Ulm. Minnesota.

4 Department of Animal Husbandry-Veterinary Science.






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