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The survival feeding of pregnant and lactating beef cows on all-sorghum grain rations: the effects of two levels of grain and early weaning of the calves

Published online by Cambridge University Press:  27 March 2009

J. G. Morris
J. G. Morris
Affiliation:
Animal Research Institue, Queensland Department of Primary Industries, Brisbane, Australia
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Summary

Forty-six cows in store condition (mean ± S.E. body weight of 366 ± 8 kg) were fed individually either 3 or 4 kg of coarsely rolled sorghum grain/head/day for the last 100 days of pregnancy and the subsequent 70 days after parturition. Eleven of the cows on each level of feeding had their calves weaned at 3 days of age.

For the last 100 days of pregnancy, 3 kg of grain/head/day was an adequate ration for survival, but cows fed this ration lost a mean of 34 kg of body weight over this period compared to 8 kg by cows fed 4 kg of grain/head/day. Only 78% of the cows fed 3 kg grain/day survived to 70 days after parturition, whereas all cows fed 4 kg/day survived. There was a 44% incidence of retained placentae and metritis in cows fed 3 kg grain/day whereas those fed 4 kg/day had only an 18% incidence. Weaning of the calves at 3 days of age reduced the body weight loss of the cows by a mean of 40 kg over the first 70 days of lactation, but the effect was less for cows fed 3 kg grain (27 kg) than for those fed 4 kg grain (53 kg).

Birth weight of the calves was not affected by the level of grain fed to the cows, but calves weaned and given 3 kg of milk/day plus a 50/50 creep of lucerne chaff and sorghum grain grew faster than calves not weaned and given only a sorghum grain creep.

The omission of a source of calcium in the grain ration resulted in no apparent adverse clinical effects in the cows. The Na:K ratio of the saliva indicated that nine of the cows had been depleted of Na.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 75 , Issue 3 , December 1970 , pp. 479 - 484
Copyright
Copyright © Cambridge University Press 1970

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References

Agricultural Research Council (1965). The Nutrient Requirements of Farm Livestock, no. 2. Ruminants. Technical Reviews and Summaries. London: Agricultural Research Council.Google Scholar
Blair-West, J. R., Coghlan, J. P., Denton, D. A., Goding, J. R. & Wright, R. D. (1964). In Salivary Glands and Their Secretions (ed. Sreebny, L. M. and Meyer, J.), pp. 253–79. New York: Macmillan.CrossRefGoogle Scholar
Blair–West, J. R., Bott, E., Boyd, G. W., Coghlan, J. P., Denton, D. A., Goding, J. R., Weller, S., Wintour, M. & Wright, R. D. (1965). In Physiology of Digestion in the Ruminant (ed. Dougherty, R. W.), p. 198. Washington: Butterworth.Google Scholar
Denton, D. A. (1956). The effect of Na+ depletion on the Na+:K+ ratio of the parotid saliva of sheep. J. Physiol., Lond. 131, 516.CrossRefGoogle Scholar
Hungerford, T. G. (1967). Diseases of Livestock, 6th ed., p. 202. Sydney: Angus and Robertson Ltd.Google Scholar
Morris, J. G. (1958). Drought feeding studies with cattle and sheep. 3. A preliminary note on the use of sorghum as a drought fodder for cattle grain. Qd J. agric. Sci., 15, 195.Google Scholar
Morris, J. G. (1968 a). Feeding heifers for survival on whole and cracked sorghum grain under simulated drought conditions. Aust. J. exp. Agric. Anim. Husb. 8, 668.CrossRefGoogle Scholar
Morris, J. G. (1968 b). The survival feeding of beef cattle during drought. Proc. Aust. Soc. Anim. Prod. 7, 20.Google Scholar
Morris, J. G. & Gartner, R. J. W. (1967). Finishing steers on high-grain rations. Effect of type of silage, level of urea, vitamin A and cobalt supplementation on body-weight gain, feed efficiency and carcass composition. J. agric. Sci., Camb. 68, 1.CrossRefGoogle Scholar
Morris, J. G. & Gartner, R. J. W. (1970 a). The sodium requirements of growing steers given an all–sorghum grain ration. Brit. J. Nutr. (In the Press.)CrossRefGoogle Scholar
Morris, J. G. & Gartner, R. J. W. (1970 b). The survival feeding of pregnant and lactating cows under simulated drought conditions on all-sorghum grain rations with and without added calcium Aust. J. exp. Agric. Anim. Husb. (In the Press).CrossRefGoogle Scholar
Roberts, S. J. (1956). Veterinary Obstetrics and Genital Diseases, p. 266. Ann Arbor, Michigan: Edwards Brothers, Inc.Google Scholar
Ronning, M., Berousek, E. R., Kuhlman, A. H. & Gallup, D. (1953). The carotene requirements for reproduction in Guernsey cattle. J. Dairy Sci. 36, 52.CrossRefGoogle Scholar
Ryley, J. W. (1961). Drought feeding studies with cattle. 6. Sorghum silage, with and without urea, as a drought fodder for cattle in late pregnancy and early lactation. Qd J. agric. Sci. 18, 409.Google Scholar
Ryley, J. W. & Gartner, R. J. W. (1962). Drought feeding studies with cattle. 7. The use of sorghum grain as a drought fodder for cattle in late pregnancy and early lactation. Qd J. agric. Sci. 19, 309.Google Scholar
Ryley, J. W., Gartner, R. J. W. & Morris, J. G. (1960). Drought feeding studies with cattle. 5. The use of sorghum grain as a drought fodder for nonpregnant heifers. Qd J. agric. Sci. 17, 339.Google Scholar
Southcott, W. H. & Mcclymont, G. L. (1960 a). Drought feeding of cattle. I. Comparison of hay-grain and all-grain rations: with observations on vitamin A status. Aust. J. agric. Res. 11, 439.CrossRefGoogle Scholar
Southcott, W. H. & McClymont, G. L. (1960 b). Drought feeding of cattle. II. Comparison of daily and weekly feeding of all-grain rations: with observations on vitamin A status. Aust. J. agric. Res. 11, 445.CrossRefGoogle Scholar
Underwood, E. J. (1966). The Mineral Nutrition of Livestock. Food and Agriculture Organization of the United Nations—Commonwealth Agricultural Bureaux.Google Scholar