Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-26T20:18:00.882Z Has data issue: false hasContentIssue false
  • English
  • Français

Sustained release of chromic oxide in the rumen of sheep from a CR2O3-paper pellet

Published online by Cambridge University Press:  02 September 2010

J. E. Troelsen
J. E. Troelsen
Affiliation:
Experimental Farm, Research Branch, Canada Department of Agriculture, Swift Current, Saskatchewan
Get access

Summary

1. Pellets of Cr2O3-paper were administered to sheep to reveal the excretion pattern of Cr2O3 in the faeces.

2. Two sheep fed on long hay and pelleted hay for each of two 28-day periods were given a Cr2O3-paper pellet daily at 9 00 hrs. during the 15th to the 24th day inclusive in each period.

3. Total faeces were collected at hourly intervals during the 15th to the 28th day. Dry weight and concentration of Cr2O3 of each fraction was determined.

4. A balance between input and output of Cr2O3 and a minimal standard J deviation of the concentration of Cr2O3 in the faeces between hourly collections was reached in 3 days with long hay and in 2 days when the hay was given as pellets.

5. The decline in the concentration of Cr2O3 in the faeces started the day after the administration of pellets was discontinued.

6. Grinding and pelleting of the hay resulted in a doubling of the standard deviations of the concentration of Cr2O3 in the hourly faeces collections during the period of input-output equilibrium.

7. A pattern of a diurnal cyclic trend was apparent in the concentration of Cr2O3 in the hourly faeces collections, but it varied between animals and between diets.

8. Pellets of Cr2O3-paper are suggested to facilitate the administration of Cr2O3 to ruminants.

9. The effect of sampling frequency and animal replication on estimation accuracy is discussed.

Type
Research Article
Information
Animal Production , Volume 7 , Issue 2 , June 1965 , pp. 239 - 245
Copyright
Copyright © British Society of Animal Science 1965

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Corbett, J. L., Greenhalgh, J. F. D., McDonald, I., & Florence, E., 1960. Excretion of chromium sesquioxide administered as component of paper to sheep. Brit. J. Nutr., 14: 289.CrossRefGoogle Scholar
Cowlishaw, S. J., & Alder, F. E., 1963. A comparative study of paper and oil as carriers of chromium sesquioxide administered to grazing steers to determine their faecal output. J. Brit. Grassl. Soc. 18: 328.CrossRefGoogle Scholar
Dodds, M. E., & Troelsen, J. E., 1962. A faeces fraction-collector for sheep. Canad. J. Anim. Sci., 42: 118.Google Scholar
Edin, H., 1926. Medd. Nr. 309. Centralanstalten for försökväsendet pé jordbruksomrādet. Stockholm.Google Scholar
Fisher, L. J., 1962. The evaluation of the use of chromic oxide sustained release pellets in digestibility studies with ruminant animals. M.Sc. Thesis, Dept. of Animal Science, University of Saskatchewan.Google Scholar
Langlands, J. P., Corbett, J. L., McDonald, I., & Reid, G. W., 1963a. Estimation of the faeces output of grazing animals from the concentration of chromium sesquioxide in a sample of faeces. 1. Comparison of estimates from samples taken at fixed times of day with faeces outputs measured directly. Brit. J. Nutr., 17: 211.CrossRefGoogle Scholar
Langlands, J. P., Corbett, J. L., McDonald, I., & Reid, G. W., 1963b. Estimation of the faeces output of grazing animals from the concentration of chromium sesquioxide in a sample of faeces. 2. Comparison of estimates from samples taken at fixed times of day with estimates from samples collected from the sward. Brit. J. Nutr., 17: 219.Google Scholar
Pigden, W. J., & Brisson, G. J., 1957. Note on a chromium oxide pellet to provide uniform release of this indicator in the rumen of cattle. Canad. J. Anim. Sci., 37: 185.CrossRefGoogle Scholar
Snedecor, G. W., 1956. Statistical Methods. Fifth edition. The Iowa State College Press, Ames, Ia.Google Scholar
Troelsen, J. E., 1961. Preliminary observations in the use of a sustained release pellet for administration of chromic oxide to sheep in digestibility studies. Canad. J. Anim. Sci., 41: 71.CrossRefGoogle Scholar
Troelsen, J. E., 1963. Note on a chromic oxide paper pellet for administration to ruminants. Canad. J. Anim. Sci., 43: 389.CrossRefGoogle Scholar
Troelsen, J. E., 1965. A note on sustained release of chromic oxide in the rumen of sheep from a chromic oxide—dental plaster pellet. Anim. Prod., 7: 127.Google Scholar