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Long- and short-term effects on intake of pelleting a roughage for sheep

Published online by Cambridge University Press:  02 September 2010

J. F. D. Greenhalgh  and
G. W. Reid
J. F. D. Greenhalgh
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
G. W. Reid
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
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Summary

1. Four groups of eight castrated male lambs, weighing initially about 37 kg, were fed ad libitum for 18 weeks on: C, chopped dried grass throughout; P, pelleted grass throughout; C/P (or P/C), the two forms alternated every 3 weeks; or C + P, both forms on offer.

2. Daily dry-matter intake (g/kg W0·75) was 58·2 for treatment C and 814 for treatment P; thus the long-term difference in intake was 40%. However, in the alternated sheep, dry-matter intake was 53·6 g/kg W0·75 for chopped grass and 86·5 g for pelleted; this short-term difference (61%) was significantly greater than the long-term difference. Dry-matter intake for treatment C+P was 84·9 g/kg W0·75; after the first week, chopped grass comprised only 10% of this. Dry-matter digestibility coefficients (%) were: C, 740; P, 61·4 and C+P, 62·0.

3. The sheep were killed in week 19 and the dimensions of digestive organs and their contents were adjusted to an animal of 50 kg empty body weight. The weight of the reticulo-rumen was greater for C (1·30 kg) than for P (0·94) or C+ P (1·05), C/P and P/C being inter-mediate (1·15). The water-filled volume of the rumen was proportional to weight, except that C/P (alternated sheep finishing on pelleted grass) had low volumes. Reticulo-rumen fill was greater for C (7·28 kg) than for P (3·97) or C+ P (4·53), P/C (5·90) and C/P (4·34) being intermediate. There were no other significant differences in organs or contents.

4. Gains in empty-body weight (g/day) were: C, 112; P, 181; C/P and P/C, 126; C + P, 195.

Type
Research Article
Information
Animal Production , Volume 19 , Issue 1 , August 1974 , pp. 77 - 86
Copyright
Copyright © British Society of Animal Science 1974

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References

REFERENCES

Campling, R. C. and Freer, M. 1966. Factors affecting the voluntary intake of food by cows. 8. Experiments with ground, pelleted roughages. Br. J. Nutr. 20: 229–244.CrossRefGoogle ScholarPubMed
Greenhalgh, J. F. D. and Reid, G. W. 1973a. The food intake and growth of lambs given chopped and/or pelleted dried grass. Proc. Br. Soc. Anim. Prod. 2: 68–69.Google Scholar
Greenhalgh, J. F. D. and Reid, G. W. 1973b. The effects of pelleting various diets on intake and digestibility in sheep and cattle. Anim. Prod. 16: 223–233.Google Scholar
Greenhalgh, J. F. D. and Wainman, F. W. 1972. The nutritive value of processed roughages for fattening cattle and sheep. Proc. Br. Soc. Anim. Prod. (New Series) 1: 61–72.CrossRefGoogle Scholar
Harrison, H. N., Warner, R. G., Sander, E. G. and Loosli, J. K. 1960. Changes in the tissue and volume of the stomachs of calves following the removal of dry feed or consumption of inert bulk. j. Dairy Sci. 43: 1301–1312.CrossRefGoogle Scholar
Hinders, R. G. and Owen, F. G. 1968. Ruminal and post-ruminal digestion of alfalfa fed as pellets or long hay. J. Dairy Sci. 51: 1253–1257.CrossRefGoogle Scholar
Hodgson, J. 1971. The development of solid food intake in calves. 3. The relation between solid food intake and the development of the alimentary tract. Anim. Prod. 13: 449–460.Google Scholar
Hodgson, J. 1973. The effect of the physical form of the diet on the consumption of solid food by calves and the distribution of food residues in their alimentary tracts. Anim. Prod. 17: 129–138.Google Scholar
Large, R. V. 1964. The development of the lamb with particular reference to the alimentary tract. Anim. Prod. 6: 169–178.Google Scholar
Pritchard, G. I. and Heaney, D. P. 1963. Effects of pelleting rations on distribution of ingesta in the alimentary tract of sheep. Can. J. Anim. Sci. 43: 226–236.CrossRefGoogle Scholar
Stobo, I. J. F., Roy, J. H. B. and Gaston, H. J. 1966. Rumen development in the calf. 1. The effect of diets containing different proportions of concentrates to hay on rumen development. Br. J. Nutr. 20: 171–188.CrossRefGoogle ScholarPubMed
Tayler, J. C. 1959. A relationship between weight of internal fat, ‘fill’ and the herbage intake of grazing cattle. Nature, Lond. 184: 2021–2022.CrossRefGoogle Scholar
Van Niekerk, A. I., Greenhalgh, J. F. D. and Reed, G. W. 1973. Importance of palatability in determining the feed intake of sheep offered chopped and pelleted hay. Br. J. Nutr. 30: 95–105.CrossRefGoogle ScholarPubMed
Warner, R. G. and Flatt, W. P. 1965. Anatomical development of the ruminant stomach. In Physiology of Digestion in the Ruminant (ed. Dougherty, R. W.). Butterworths, Washington.Google Scholar