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Eating and ruminating behaviour in cattle given forages differing in fibre content

Published online by Cambridge University Press:  02 September 2010

M. N. McLeod  and
B. R. Smith
M. N. McLeod
Affiliation:
CSIRO Division of Tropical Crops and Pastures, Cunningham Laboratory, St Lucia, Queensland 4067, Australia
B. R. Smith
Affiliation:
CSIRO Division of Tropical Crops and Pastures, Cunningham Laboratory, St Lucia, Queensland 4067, Australia
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Abstract

A study was made of the effect of fibre level in forages on eating and rumination behaviour. Eight forage diets were prepared from the leaf and stem fractions of two grasses and two legumes and were given at hourly intervals to four steers under steady-state conditions. Eating and rumination behaviour were measured automatically by recording changes in intra-oesophageal pressure.

Mean voluntary intake of leaf was higher than that of the stem fractions (9·9 v. 5·6 kg/day; P < 0·001). This was associated with a shorter mean retention time in the rumen of the leaf than that of the stem fractions (21·4 v. 30·6 h; P < 0·001) and a lower concentration (g/100 g dry matter (DM)) of fibre (52-0 neutral-detergent fibre (NDF) and 30·5 acid-detergent fibre (ADF) v. 68·2 NDF and 45·3 ADF). Similar values (P > 0·05) between diets were found for both the water and DM contents of the rumen (60·1 kg, 7·8 kg). Voluntary intake was not related to either.

No difference was found between forage diets in the mean time (132 min) and number (18·7) of periods spent eating each day (P > 0·05). Legume leaf fractions were eaten at a faster rate (g/min) than either the grass leaf or the stem fractions. Voluntary intake was related to the rate at which food was eaten (r = 0·89; P < 0·01) but no relationship was found with the time taken to eat food (r = –0·14; P>0·05). Eating rate was related to the level of both NDF (r = –0·91; P < 0·01) and ADF (r = –0·96; P < 0·001).

Differences between diets were found in rumination times (mean 425 min; P < 001), the number of boluses regurgitated during each period (27·6; P < 0·05) and during each day (485; P < 0·001), and in the weight of boluses (455 g; P < 0·05). No differences (P > 0·05) were found between diets in the mean number of rumination periods each day (17·6), the mean time spent ruminating during each period (24·3 min), the mean rate at which boluses were regurgitated (53·2 s per bolus), the interval between boluses (5·1 s), and the DM in a bolus (27·5 g). Rumination time and the number of boluses regurgitated either per period or per day were not related to the fibre content of the diet (P > 0·05).

The regurgitated boluses from leaf fractions were chewed less than the stem fractions (43·7 v. 54·7 chews per bolus). The regurgitated boluses of lucerne leaf were chewed at a faster rate (1·13 chews per s; P > 0·05) than regurgitated digesta of the other diets which were chewed at similar rates (0·97 chews per s; P > 0·05). The total number of rumination chews made each day by animals given lucerne leaf (12 300) was much lower (P < 0·001) than that by animals given the other fractions (25 300). The number of chews made on each bolus was related to fibre levels in the diets (NDF, r = 0·78, P < 0·05; ADF, r = 0·91, P < 0·01).

It is concluded that the voluntary intake of high-fibre diets is not always restricted by rumen fill or rumination. The ease with which forage is eaten should be investigated as a factor influencing intake of fibrous forages.

Type
Papers
Information
Animal Production , Volume 48 , Issue 3 , June 1989 , pp. 503 - 511
Copyright
Copyright © British Society of Animal Science 1989

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References

REFERENCES

Campling, R. C. and Balch, C. C. 1961. Factors affecting the voluntary intake of food by cows. 1. Preliminary observations on the effect, on the voluntary intake of hay, of changes in the amount of the reticulo-ruminal contents. British Journal of Nutrition 15: 523–530.CrossRefGoogle Scholar
Dulphy, J. P., Remond, B. and Theriez, M. 1980. Ingestive behaviour and related activities in ruminants. In Digestive Physiology and Metabolism in Ruminants (ed. Ruckebusch, Y. and Thivend, P.), pp. 103–122. AVI Publishing Company, Connecticut.Google Scholar
Forbes, J. M., Wright, J. A. and Bannister, A. 1972. A note on rate of eating in sheep. Animal Production 15: 211–214.Google Scholar
Freer, M., Campling, R. C. and Balch, C. C. 1962. Factors affecting the voluntary intake of food by cows. 4. The behaviour and reticular motility of cows receiving diets of hay, oat straw and oat straw with urea. British Journal of Nutrition 16: 279–295.CrossRefGoogle ScholarPubMed
Frisch, J. E. and Vercoe, K. E. 1977. Food intake, eating rate, weight gains, metabolic rate and efficiency of feed utilization in Bos taurus and Bos indicus crossbred cattle. Animal Production 25: 343–358.Google Scholar
Fujihara, T. and Nakao, T. 1982. Eating and rumination behaviour in sheep given silage made from the fibrous residue of broad bean (Vicia faba L.). Journal of Agricultural Science, Cambridge 98: 237–240.Google Scholar
Gill, J., Campling, R. C. and Westgarth, D. R. 1966. A study of chewing during eating in the cow. British Journal of Nutrition 20: 13–23.Google Scholar
Harumoto, T. and Kato, M. 1978. Effect of crude fibre content in the diets on ruminating behaviour of sheep. Bulletin of the Faculty of Agriculture, Shimane University 12: 26–30.Google Scholar
Jaster, E. H. and Murphy, M. R. 1983. Effects of varying particle size of forage on digestion and chewing behaviour of dairy heifers. Journal of Dairy Science 66: 802–810.Google Scholar
Kennedy, P. M. 1985. Effect of rumination on reduction of particle size of rumen digesta by cattle. Australian Journal of Agricultural Research 36: 819–828.CrossRefGoogle Scholar
McLeod, M. N. 1986. Physical and biological factors controlling the reduction of feed particles in the ruminant. Ph.D. Thesis, University of Queensland, Brisbane, Australia.Google Scholar
McLeod, M. N. and Minson, D. J. 1988. Large particle breakdown by cattle eating ryegrass and alfalfa. Journal of Animal Science 66: 992–999.Google Scholar
Minson, D. J. 1966. The apparent retention of food in the reticulo-rumen at two levels of feeding by means of an hourly feeding technique. British Journal of Nutrition 20: 765–773.CrossRefGoogle ScholarPubMed
Minson, D. J. and Cowper, J. L. 1966. Diurnal variations in the excretion of faeces and urine by sheep fed once daily or at hourly intervals. British Journal of Nutrition 20: 757–764.Google Scholar
Poppi, D. P., Minson, D. J. and Ternouth, J. H. 1981. Studies of cattle and sheep eating leaf and stem fractions of grasses. I. The voluntary intake, digestibility and retention time in the reticulo-rumen. Australian Journal of Agricultural Research 32: 99–108.CrossRefGoogle Scholar
Stevens, C. E. and Sellers, A. F. 1968. Rumination. In Handbook of Physiology, Section 6: Alimentary Canal. Volume 5: Bile; Digestion; Ruminal Physiology (ed. Code, C. F.), pp. 2699–2704. American Physiological Society, Washington.Google Scholar
Stobbs, T. H. and Cowper, J. L. 1972. Automatic measurement of the jaw movements of dairy cows during grazing and rumination. Tropical Grasslands 6: 107–112.Google Scholar
Van soest, P. J. 1982. Nutritional Ecology of the Ruminant, p. 336. O. and B. Books, Corvallis, USA.Google Scholar
Van soest, P. J. and Wine, R. H. 1967. Use of detergents in the analysis of fibrous feeds. IV. Determination of plant cell-wall constituents. Journal of the Association of Official Agricultural Chemists 50: 50–55.Google Scholar
Welch, J. G. 1982. Rumination, particle size and passage from the rumen. Journal of Animal Science 54: 885–894.Google Scholar