Physiological factors affecting the voluntary intake of feed by cows: A review

Journet, M.; Rémond, Bernard

doi:10.1016/0301-6226(76)90030-0

Cited by 73 publications

(26 citation statements)

References 42 publications

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“…This should be reflected by typical concomitant changes of at least BHB, NEFA, and insulin. However, due of the metabolic demands of lactation, high-yielding cows usually eat more constantly than non-lactating animals as long as feed is available (Journet and Remond, 1976;Grummer et al, 2004). Furthermore, environmental conditions, social rank of individual cows in the herd, bunk space available per cow, and milking regime interact with patterns of feed intake.…”

Section: Discussionmentioning

confidence: 99%

Intraday variation of metabolic key indicators in serum of dairy cows between week 2 antepartum and week 12 postpartum

Wiedemann¹,

Horstmann²,

Marion³

et al. 2013

CZECH J ANIM SCI

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ABSTRACT:Metabolic diseases during early lactation in dairy cows can be routinely diagnosed assessing key indicators in blood. The objectives of the present study were to characterize the impact of interindividual along with intraday variation on specific metabolites and to investigate the effect of the sampling time point relative to calving. Serum samples of four high-yielding, clinically healthy, multiparous dairy cows (body weight 589 ± 27 kg) were obtained in 3-h intervals during 24-h intervals throughout the transition period and early lactation (week -2 antepartum (ap), weeks 1, 2, 3, 5, 7, and 12 postpartum (pp)). The lowest intraday variation (less than 15%) as indicated by relative coefficients of variation (CV) was found for glucose, cholesterol, and aspartate aminotransferase (AST). Intraday variation characterized by a CV between 15 and 30% was typical of urea, β-hydroxybutyrate (BHB), total bilirubin, and non-esterified fatty acids (NEFA). The highest intraday variation (CV > 30%) was assessed for insulin. Week relative to calving had significant influence on interindividual means of BHB, NEFA, insulin, and cholesterol in blood, but did not affect the interindividual variation of all parameters investigated. No significant intraday variation patterns were found. It is concluded that the considerable intraday variation of especially BHB and NEFA has to be taken into account in herd health monitoring for estimating the proportional outcome in respect to animals exceeding thresholds for specific metabolic key parameters.

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Section: Discussionmentioning

confidence: 99%

Intraday variation of metabolic key indicators in serum of dairy cows between week 2 antepartum and week 12 postpartum

Wiedemann¹,

Horstmann²,

Marion³

et al. 2013

CZECH J ANIM SCI

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“…Les (Chen et al, 1992 ;Cecava et Parker, 1993) ou affectés de manière très modérée (Amos et Evans, 1976 ;Cecava et al, 1988) par la nature de la source d'azote dégradable lorsque l'urée représente moins de 30 % de l'azote total du régime, ce qui a été le cas dans notre étude. En fait, le remplacement de l'N uréique par de la caséine n'accroît l'efficacité des synthèses que dans le cas de régimes synthétiques ne contenant pratiquement pas de protéines (Hume, 1970 ; Kellaway, 1979 (Hoover, 1986 (Huber et al, 1976 ;Journet et Rémond, 1976). De même, de nombreuses études conduites sur des bovins alimentés avec des foins pauvres en MAT (< 9-10 %) ont mis…”

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Effet du niveau et de la nature de l'azote dégradable sur la digestion ruminale d'un régime à base d'ensilage de maïs chez la vache laitière

Peyraud¹,

Liboux²,

Vérité³

1997

Reprod. Nutr. Dev.

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“…Dans le cas d'une distribution unique d'aliment le matin, Metz (1975), contrairement à Suzuki et Hidari (19731, observe Dulphy, Rémond et Thériez, 1979 ;Jaster et Murphy, 19831, mais les périodes de rumination sont évidemment rythmées par la distribution de l'aliment (Campling, 1966 ;Journet et Rémond, 1976 ;Doreau et Rémond, 1982 Dulphy, 1980 ;Dulphy et Carle, 1986). Les (Dulphy et Michalet-Doreau, 1983) (Ruckebusch, 1963) Faverdin, 1985 ;Gill, Campling et Westgarth, 1966 (Gatel, 1984 (Freer, Campling et Freer et Campling, 1965 (Freer, Campling et Hidari, 1970 (Faverdin, 1985).…”

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L'ingestion alimentaire chez les ruminants : modalités et phénomènes associés

Dulphy¹,

Faverdin²

1987

Reprod. Nutr. Dévelop.

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Summary. Food intake in ruminants : modalities and associated phenomena.This paper synthesizes the literature on modalities of food intake in ruminants and their main associated phenomena.Firstly, circadian distribution of feeding and ruminating activities has been examined. Ruminants spend a large part of their time chewing. Their meals have been described in detail ; changes in rates of intake, time spent eating, the effect of restricting the amount fed or the period of feed accessibility have been discussed. When food is distributed, the animals have a « long » meal. These meals have been analysed in relation to the type of animal and the feed offered. The other meals (« small » meals) have been briefly described.The paper next examines the phenomena associated with meals, or induced by them, and implied in the control of food intake. Forestomach motricity varies according to ruminant feeding behavior and plays a basic role in digesta transit. Rumen content varies with the meal and its chemical composition due to the arrival in the rumen of food, water and saliva. Rumination may require 600 to 650 min/day and is important in the comminution and sorting of rumen particles.The digestive phenomena associated with meals are related to control of intake. The influence of rumen fill has been thoroughly discussed.Finally, main humoral changes due to intake have been reviewed. The influence of volatile fatty acids (VFA) and metabolites has been discussed as well as the role of glucose, amino acids and fatty acids. Among the hormones, insulin and glucagon seem to play an important role in controlling food intake. The amounts of gastrointestinal hormones increase during intake and may also play an important part.Despite a net improvement in the knowledge of phenomena related to intake, much still remains to be done in setting up models to describe these phenomena in (Gatel, 1984 Buéno, 1972). Plusieurs articles de synthèse ont été consacrés à la motricité du réticulo-rumen (Reid, 1963 ;Wyburn, 1979 ; Ruckebusch, Buéno et Fioramonti, 19811. (Balch, 1958 ;Reid, 1963 ; Waghorn et Reid, 1977, tabl. 4 (Piton, 1975) et donc selon les besoins de l'animal (Tulloh et Pond et al., 1984 (Campling, Freer et Balch, 1963) : elle baisse si la proportion de concentré dans la ration augmente (Bines et Davey, 1970). Cependant, l'amplitude des variations est souvent faible (Thornton et Minson, 1972Laredo et Minson, 19731, même pour des fourrages très différents, en l'absence de facteurs limitants tels que l'inappétibilité de l'aliment, une carence en azote ou un excès de concentré dans la ration. Dans le cas d'ensilages mal conservés ou à brins longs, le niveau des contenus à la fin des grands repas est plus faible que pour les ensilages de bonne qualité (Dulphy, Béchet et Thomson, 1975

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Physiological factors affecting the voluntary intake of feed by cows: A review

Cited by 73 publications

References 42 publications

Intraday variation of metabolic key indicators in serum of dairy cows between week 2 antepartum and week 12 postpartum

Intraday variation of metabolic key indicators in serum of dairy cows between week 2 antepartum and week 12 postpartum

Effet du niveau et de la nature de l'azote dégradable sur la digestion ruminale d'un régime à base d'ensilage de maïs chez la vache laitière

L'ingestion alimentaire chez les ruminants : modalités et phénomènes associés

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