Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-12-01T09:12:59.009Z Has data issue: false hasContentIssue false
  • English
  • Français

Nitrogen metabolism in indigenous Malawi goats

Published online by Cambridge University Press:  27 March 2009

L. Reynolds
L. Reynolds
Affiliation:
University of Malawi, Bunda College of Agriculture, Box 219, Lilongwe, Malawi
Get access Rights & Permissions [Opens in a new window]

Summary

Four mature castrate Malawi goats, mean live weight 29·66 kg, were offered diets of poor quality Rhodes grass hay, or hay plus a concentrate comprising either maize bran or maize bran-cotton seed cake mixed in varying proportions, so that N intake varied from 4·76 to 20·81 g/day in a series of four metabolism trials.

By extrapolation metabolic faecal N loss was estimated to be 9·94 g/kg faecal D.M. and that of endogenous urinary N to be 0·121 g/kg W0·75. The daily maintenance requirement for nitrogen was shown by a factorial method to be 0·682 gN/kg W0·75, and by use of regression equations to be 0·688 g N/kg W0·75 or 0·314 g apparent digestible N/kg W0·75. The mean daily requirement was 8·8 g N, with a mean apparent digestibility of N of 43·4%, and a true digestibility of 80·0%.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 96 , Issue 2 , April 1981 , pp. 347 - 351
Copyright
Copyright © Cambridge University Press 1981

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

Agricultural Research Council (1965). The Nutrient Requirements of Farm Livestock, no. 2. Ruminants. London: Agricultural Research Council.Google Scholar
Akinsoyinu, A. O., Mba, A. U. & Olubayo, F. O. (1976). Crude protein requirement of West African Dwarf goats for maintenance and gain. Journal of the Association for the Advancement of Agricultural Sciences in Africa 3, 75–80.Google Scholar
Arman, P., Hopcraft, D. & McDonald, I. (1975). Nutritional studies on East African herbivores. 2. Losses of nitrogen in the faeces. British Journal of Nutrition 33, 265–276.CrossRefGoogle ScholarPubMed
Devendra, C. (1978). The digestive efficiency of goats. World Review of Animal Production 14 (1), 9–22.Google Scholar
Hironaka, R., Bailey, C. B. & Kozub, G. C. (1970). Metabolic nitrogen in ruminants estimated from dry matter excretion. Canadian Journal of Animal Science 50, 55–60.CrossRefGoogle Scholar
Itoh, M., Haryu, T., Tano, R. & Iwasaki, K. (1978). Maintenance requirements of energy and protein for castrated Japanese native goats. Bulletin of National Institute of Animal Industry (Japan) no. 33, pp. 41–50.Google Scholar
Majumdar, B. N. (1960 a). Studies on goat nutrition. Part I. Minimum protein requirements of goats for maintenance from balance studies. Journal of Agricultural Science, Cambridge 54, 329–334.CrossRefGoogle Scholar
Majumdar, B. N. (1960 b). Studies on goat nutrition. Part II. Digestible protein requirements for maintenance from balance studies. Journal of Agricultural Science, Cambridge 54, 335–340.CrossRefGoogle Scholar
Mba, A. U., Egbuiwe, C. P. & Oyenuga, V. A. (1975). Nitrogen-balance studies with Red Sokoto (Maradi) goats for the minimum protein requirements. East African Agricultural and Forestry Journal 40, 285–291.CrossRefGoogle Scholar