Activités alimentaires et méryciques de moutons recevant des foins à l'auge

Dulphy, J.P.; Demarquilly, C.; Dudilieu, M.; Jailler, Marie

doi:10.1051/animres:19920208

Cited by 1 publication

(1 citation statement)

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“…Therefore, steers consuming both traditional and textured diets showed greater total chewing activity than steers fed either corn cob or both alfalfa cube diets. This effect of supplementation with long hay increasing time spent ruminating and total chewing activity is in agreement with observations on dairy cows fed at 85% of ad libitum , as well as with observations under ad libitum access to diet showing that increasing CF or NDF contents induced larger daily and unitary ruminating and total chewing times (Dulphy and Demarquilly 1992;Embrechts and Deswysen 1992).…”

Section: Resultssupporting

confidence: 91%

Quantitative analysis of nycterohemeral eating and ruminating patterns in beef cattle fed pelleted concentrates with or without supplemental roughage

Deswysen¹,

Dutilleul²,

Fischer³

et al. 1997

Can. J. Anim. Sci.

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. 1997. Quantitative analysis of nycterohemeral eating and ruminating patterns in beef cattle fed pelleted concentrates with or without supplemental roughage. Can. J. Anim. Sci. 77: 375-384. The effects of five diets on nycterohemeral pattern of chewing behaviour were evaluated in 10 Hereford steers according to a replicated 5 × 5 Latin square design. Steers had ad libitum access to diets, fed once daily at 09:00 h and chewing behaviour was continuously measured for 4 d. Dietary treatments were: 1) traditional diet -80% pelleted concentrate (control) and 20% long timothy hay; 2) 80% control concentrate and 20% alfalfa cubes; 3) 90% control concentrate and 10% alfalfa cubes; 4) a completely pelleted diet with corn cobs; 5) 80% textured concentrate and 20% long timothy hay. Spectral analysis of hourly time spent either eating or ruminating was performed using the finite Fourier transform to decompose the 24-h total dispersion of chewing into 12 RC. Nycterohemeral patterns of time spent eating and ruminating different diets were mainly explained by RC 1, 2 and 3. RC 1 was relatively more important than the others in explaining total daily dispersion of time spent eating traditional completely pelleted with corn cobs and textured diets, while RC 1 and 3 presented similar relative importance for both alfalfa cube diets. Relative importance of RC 1 of time spent eating each diet was related positively to VI of diet DM (r = 0.88, P = 0.047) and NDF (r = 0.92, P = 0.027). Nycterohemeral eating and ruminating patterns of individual steers were mostly explained by RC 1, 2 and 3. Relative importance of RC 11 and 12 of time spent ruminating were related positively to VI by steers of DM (respectively, r = 0.81, P = 0.004 and r = 0.63, P = 0.052) and NDF (respectively, r = 0.69, P = 0.027 and r = 0.67, P = 0.034). Overall, these relationships suggest that with once daily feeding of concentrate-based diets a larger VI is achieved with a more important one main nycterohemeral eating period associated to regular relative important two-hourly rumination periods, these latter are probably enhancing continuity of digesta flow and nutrients uptake.Key words: Beef cattle, nycterohemeral chewing, finite Fourier transform Deswysen, A. G., Dutilleul, P., Fischer, V. et Campbell, C. P. 1997. Analyse quantitative du comportement alimentaire et mérycique nycthéméral chez des bouvillons affouragés de concentrés en pellets avec ou sans supplément de fourrage grossier. Can. J. Anim. Sci. 77: 375-384. Les effets de cinq rations sur l'évolution nycthémérale du comportement masticatoire furent évalués sur 10 bouvillons de race Hereford selon un schéma expérimental en double carré latin 5 × 5. Les bouvillons furent affouragés ad libitum, une fois par jour à 9:00 h et le comportement masticatoire fut mesuré en continu durant quatre jours. Les cinq rations utilisées furent: 1) ration traditionnelle: 80 % de concentré en pellets (contrôle) et 20 % de foin de fléole, 2) 80 % de concentré contrôle et 20 % de cubes de luzerne, 3) 90 % de concentré cont...

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Section: Resultssupporting

confidence: 91%