Hostname: page-component-77c89778f8-5wvtr Total loading time: 0 Render date: 2024-07-23T21:45:13.600Z Has data issue: false hasContentIssue false
  • English
  • Français

The effect of hexoestrol on nitrogen retention of lambs and on ration digestibility

Published online by Cambridge University Press:  06 May 2016

T. R. Preston ,
V. Rochanasaroj  and
Isoline Gee
T. R. Preston
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeenshire
V. Rochanasaroj
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeenshire
Isoline Gee
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeenshire
Get access

Extract

It is now widely accepted that the subcutaneous implantation of stilboestrol or hexoestrol increases the rate of live-weight gain in lambs and cattle. In sheep it is generally considered that for a feeding period of up to 12 weeks a single implantation of hormone produces an adequate growth response. Perry et al.(1951), Stephens & Thompson (1952) and Bell et al.(1954) reported no advantage from repeated implantations during the experimental period. In a series of experiments at this Institute (Preston & Gee, 1957a) it has been noticed that the major part of the increased weight gain takes place during the first six weeks after hexoestrol implantation.

Type
Research Article
Information
Proceedings of the British Society of Animal Production , Volume 1958 , 1958 , pp. 13 - 17
Copyright
Copyright © The British Society of Animal Production 1958

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

Bell, T. D., Smith, W. H., & Erhart, A. B., 1954. The effect of stilbestrol upon lamb performance in the feedlot.J. Anim. Sci., 13: 425.Google Scholar
Brooks, C. C., Garner, G. B., Muhrer, M. E., & Pfander, W. F., 1953. The effect of fat and diethylstilbestrol on cellulose digestion by sheep rumen microorganisms. J. Anim. Sci., 12: 909.(Soc. Proc.)Google Scholar
Clegg, M. T., & Cole, H. H., 1954. The action of stilbestrol on the growth response in ruminants. J. Anim. Sci., 13: 108.Google Scholar
Erwin, E. S., Dyer, I. A., & Ensminger, M. E., 1956. Effects of chlortetracycline, inedible animal fat, stilbestrol and high and low quality roughage on performance of yearling steers. II. Digestibility of dry matter, crude fibre, crude protein, and ether extract.J. Anim. Sci. 15: 717.Google Scholar
Jordan, R. M., 1953. Effect of stilbestrol on suckling and fattening lambs. J. Anim. Sci., 12: 670.Google Scholar
Lorenz, F. W., 1954. Effects of oestrogens on domestic fowl and applications in the poultry industry. Vitamins & Hormones, 12: 235.Google Scholar
Mullick, D. N., Murty, V. N., & Kehar, N. D., 1953. Effect of stilbestrol and thiouracil on the utilisation of nutrients in sheep. J. Anim. Sci., 12: 950. (Soc. Proc.)Google Scholar
Perry, T. W., Andrews, F. N., & Beeson, W. M., 1951. The effects of stilbestrol on suckling lambs.J. Anim. Sci., 10: 602.CrossRefGoogle Scholar
Preston, T. R., & Gee, I., 1957a. Unpublished data.Google Scholar
Preston, T. R., & Gee, I., 1957b. Effect of hexoestrol on carcass composition and efficiency of food utilization in fattening lambs.Nature, 179:247.CrossRefGoogle Scholar
Richardson, D., Baker, F. H., Good, D. L., & Cox, R. F., 1955. The value of stilbestrol in beef cattle rations, wintering phase. Circ. Kans. agric. Exp. Sta., No. 320.Google Scholar
Stephens, W. H., & Thompson, D. S., 1952. The effects of stilboestrol on lambs. Pt. I. The effect on suckling lambs. Tasm. J. Agric, 23: 291.Google Scholar
Whitehair, C. K., Gallup, W. D., & Bell, M. C, 1953. Effect of stilbestrol on ration digestibility and on calcium, phosphorus and nitrogen retention in lambs.J.Anim. Sci., 12: 331.Google Scholar