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A study of the herbage intake and efficiency of feed utilization of grazing cattle previously fed two winter planes of nutrition

Published online by Cambridge University Press:  27 March 2009

P. B. O'Donovan ,
A. Conway  and
J. O'Shea
P. B. O'Donovan
Affiliation:
An Foras Taluntais (The Agricultural Institute), Grange, Dunsany, Co. Meath, Republic of Ireland
A. Conway
Affiliation:
An Foras Taluntais (The Agricultural Institute), Grange, Dunsany, Co. Meath, Republic of Ireland
J. O'Shea
Affiliation:
An Foras Taluntais (The Agricultural Institute), Grange, Dunsany, Co. Meath, Republic of Ireland
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Summary

An experiment was conducted using 36 Hereford × Shorthorn bullocks of about 350 kg initial live weight. Winter planes of nutrition 13 December to 23 March were ‘low’ (hay only) and ‘medium’ (hay plus 1·8 kg concentrate); the former group of 18 bullocks lost on average 21·5 kg while the latter gained 26·5 kg. Each group was then stocked at 2·5 (low), 4·3 (medium) and 6·2 (high) bullocks per hectare and rotationally grazed on 10 plots, 7 of which contained H.I.-white clover mixture and the remaining 3 contained permanent pasture. Pasture digestibility and intake were determined for 16 weekly periods between early April and the end of September. Organic matter digestibility (OMD) of grazed herbage was determined in vitro on samples obtained by means of two rumen-fistulated bullocks. One gelatin capsule containing about 10 g of chromic oxide was daily administered to each bullock to estimate organic matter output. Winter feeding planes had no significant effect on OMD, and increasing the stocking rate increased herbage OMD only during the final 6 weeks. Significantly more organic matter was ingested during the grazing season by animals which had previously been fed on a low plane of nutrition. Stocking rates also significantly affected OMI. Bullocks fed on a low plane during winter were slightly more efficient subsequently in converting herbage into live-weight gain but this was a reflection of their lower average body weight; when feed efficiency was expressed on the basis of metabolic size, bullocks fed on a medium plane were more efficient in converting feed to live-weight gain. It is concluded that the higher daily gains on pasture of bullocks previously fed on a low plane is largely the result of a significantly higher feed intake by these animals.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 78 , Issue 1 , February 1972 , pp. 87 - 95
Copyright
Copyright © Cambridge University Press 1972

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References

REFERENCES

Bohman, V. R. (1955). Compensatory growth of beef cattle; the effect of hay maturity. J. Anim. Sci. 14, 249–55.CrossRefGoogle Scholar
Greenhalgh, J. F. D., Reid, G. W., Aitken, J. N. & Florence, E. (1966). The effect of grazing intensity on herbage consumption and animal production. I. Short-term effects in strip-grazed dairy cows. J. agric. Sci., Camb. 67, 13–24.CrossRefGoogle Scholar
Greenhalgh, J. F. D., Reid, G. W. & Aitken, J. N. (1967). The effects of grazing intensity on herbage consumption and animal production. II. Longer term effects in strip-grazed cows. J. agric. Sci., Camb. 69, 217–23.Google Scholar
Greenhalgh, J. F. D. & Reid, G. W. (1969). The effect of grazing intensity on herbage consumption and animal production. III. Dairy cows grazed at two intensities on clean or on contaminated pasture. J. agric. Sci., Camb. 72, 223–8.CrossRefGoogle Scholar
Heinemann, W. W. & van Keuren, R. W. (1956). The effect of wintering plane of nutrition on subsequent gains of beef yearling steers on irrigated pasture. J. Anim. Sci. 15, 1097–1102.Google Scholar
Hull, J. L., Meyer, J. H., Bonilla, S. E. & Weitkamp, W. (1965). Further studies on the influence of stocking rate on animal and forage production from irrigated pasture. J. Anim. Sci. 24, 697–704.CrossRefGoogle ScholarPubMed
Lawrence, T. L. J. & Pearce, J. (1964). Some effects of wintering yearling beef cattle on different planes of nutrition. I. Liveweight gain, food consumption and body measurement changes during the winter period and the subsequent grazing period. J. agric. Sci., Camb. 63, 5–21.CrossRefGoogle Scholar
Meyer, J. H. & Clawson, W. J. (1964). Undernutrition and recovery from undernutrition in rats and sheep. J. Anim. Sci. 23, 214–24.Google Scholar
Meyer, J. H., Hull, J. L., Weitkamp, W. H. & Bonilla, S. (1965). Compensatory growth responses of fattening steers following various low-energy intake regimes on hay or irrigated pasture. J. Anim. Sci. 24, 29–37.Google Scholar
Minson, D. J., Taylor, J. C., Alder, F. E., Raymond, W. F., Rudman, J. E., Line, C. & Head, M. J. (1960). A method of identifying the faeces produced by individual cattle or groups of cattle grazing together. J. Br. Qrassld Soc. 15, 86–8.Google Scholar
Taylor, J. C. & Deriaz, R. E. (1963). The use of rumenfistulated steers in the direct determination of nutritive value of the ingested herbage in grazing experiments. J. Br. Grassld Soc. 18, 29–38.Google Scholar
Williams, C. H., David, D. J. & Iismaa, O. (1962). The determination of chromic oxide in faeces samples by atomic absorption spectrophotometry. J. agric. Sci., Camb. 59, 381–5.Google Scholar