Species and variety of herbage affects release of cell contents during ingestive mastication in dairy cows fed indoors

Acosta, A.; Boudon, Anne; Peyraud, Jean‐Louis

doi:10.1016/j.anifeedsci.2006.03.006

Cited by 7 publications

(17 citation statements)

References 35 publications

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“…fragment size, biomechanical properties and structural fibre concentration). This finding is in agreement with that of Acosta et al (2007) who observed no difference in the FW of boli from cows consuming different forages (ryegrass, tall fescue and white clover). Mean FW of the boli in this experiment was greater than that observed by Acosta et al (2007) (169 v. 132 g), but mean BW of cows in this experiment was also greater.…”

Section: Discussionsupporting

confidence: 93%

“…Sampling and measurements on the ingested boli Methodology for boli collection was based on that described by Acosta et al (2007) and Boudon et al (2006). Ingestive boli were sampled during the commencement, near the middle and at the end of the first feeding bout of the meal.…”

Section: Sward Management and Animal Feedingmentioning

confidence: 99%

“…Waghorn and Clark (2004) reported 50% to 80% of plant cells were ruptured through mastication in ruminants. Most plant nitrogen and all non-fibre carbohydrates (NFC) are stored within the plant cell (Sanderson and Wedin, 1989;Acosta et al, 2007), therefore the extent and pattern of cell rupture and subsequent release of nutrients will impact on their delivery to the rumen microflora and host. Studies investigating nutrient release from temperate grass and clover forage masticated by dairy cows, show 20% to 30% of intracellular nitrogen and 30% to 50% of NFC is released during ingestion (Boudon and Peyraud, 2001;Boudon et al, 2006;Acosta et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Most plant nitrogen and all non-fibre carbohydrates (NFC) are stored within the plant cell (Sanderson and Wedin, 1989;Acosta et al, 2007), therefore the extent and pattern of cell rupture and subsequent release of nutrients will impact on their delivery to the rumen microflora and host. Studies investigating nutrient release from temperate grass and clover forage masticated by dairy cows, show 20% to 30% of intracellular nitrogen and 30% to 50% of NFC is released during ingestion (Boudon and Peyraud, 2001;Boudon et al, 2006;Acosta et al, 2007). Differing physical attributes and chemical composition of forages are likely to affect the extent of comminution and nutrient release, however, no clear relationship between these and forage physical or chemical characteristics were reported in previous studies.…”

Section: Introductionmentioning

confidence: 99%

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Characteristics of boli formed by dairy cows upon ingestion of fresh ryegrass, lucerne or chicory

Minneé

Waghorn

Gregorini

et al. 2019

Animal

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This study examined the comminution of fresh herbage, subsequent nutrient release, and the characteristics of swallowed boli from three physically and chemically contrasting forages during ingestive mastication by dairy cows. The extent and pattern of nutrient release will determine their availability to rumen microflora, and potentially influence their efficiency of use. The forages evaluated were perennial ryegrass (ryegrass, Lolium perenne L., cv Alto AR37), lucerne (Medicago sativa L., cv Torlesse) and chicory (Cichorium intybus L., cv Choice). Experimental design was a 3×3 cross-over with three forages and three consecutive 1-day measurement periods, conducted twice. Six non-lactating, pregnant, multiparous Holstein-Friesian×Jersey cows (Bos taurus) were used, with the first cross-over applied to three mature (10.1±0.61 years old; BW 631±64 kg) cows, and the second to three young (4.8±0.02 years; BW 505±19 kg) cows. Fresh cut forage was offered to the cows following partial rumen evacuation. Swallowed boli were collected directly at the cardia at the commencement, middle and end of the first feeding bout of the first meal of the day. Forage species did not affect the fresh weight of ingested boli (mean 169 g, P=0.605) but the proportion of saliva in boli varied between forage. Boli of chicory contained the greatest amount of herbage material and least amount of saliva, whereas ryegrass boli were the opposite. Boli fresh weight tended to increase as time in the meal progressed, but the age of the cow was not shown to affect any boli characteristics or nutrient release. Particle size reduction was affected by forage, with 31%, 38% and 35% of chicory, lucerne and ryegrass herbage reduced to <2 mm. There was little evidence of relationship between comminution and any physical or chemical characteristic of the forage, except in ryegrass where extent of comminution was moderately correlated with herbage strength. Proportional release of herbage soluble carbohydrate exceeded that of N during mastication. Differences in loss of N were moderately correlated with the amount of N in the herbage (R 2=0.53) but herbage comminution was not strongly correlated with release of either N or carbohydrate. These findings illustrate the complex animal×forage interactions that occur during mastication, and that it is not possible to infer nutrient loss from herbage based on herbage characteristics as the driver for this differ between species.

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Section: Discussionsupporting

confidence: 93%

Section: Sward Management and Animal Feedingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characteristics of boli formed by dairy cows upon ingestion of fresh ryegrass, lucerne or chicory

Minneé

Waghorn

Gregorini

et al. 2019

Animal

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“…Additionally, absorption rates of VFA across the rumen wall may have been increased at night due to a lower rumen fluid volume, resulting in a higher effective surface area for absorption (Dijkstra et al, 1993). Small increases in the VFA pool immediately after the beginning of grazing are expected due to a low efficiency of chewing during eating (Boudon et al, 2006;Acosta et al, 2007). Ingestive chewing is one of the main reasons to release soluble nutrients from feeds (Chilibroste et al, 2007).…”

Section: Resultsmentioning

confidence: 99%

Foraging behavior and ruminal fermentation of dairy cows grazing ryegrass pasture alone or with white clover

Filho

Peyraud

Delagarde

2012

Pesq. agropec. bras.

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-The objective of this work was to evaluate the influence of pasture composition and regrowth age on the relationship between feeding behavior and ruminal fermentation in dairy cows grazing perennial ryegrass with or without white clover. The experiment was carried out in a 2x2 factorial arrangement, with two sward types and two ages of regrowth. Swards of perennial ryegrass sown alone (PRG) and of perennial ryegrass mixed with white clover (GC) were evaluated. Twelve late-lactation Holstein cows, fistulated at the rumen, were distributed in a 4x4 latin square experimental design with four 12-day periods. Daily distribution of grazing was similar in the PRG and the GC swards, but the concentration of rumen volatile fatty acids (VFA) was higher and the proportion of propionate was lower on mixed swards during the day. Daily distribution of grazing was similar in pastures of different ages. However, in the oldest swards, rumen fluid pH increased and VFA concentration decreased after evening milking. Time spent grazing does not influence ruminal fermentation, which depends on the changes that occur as different sward layers are grazed.Index terms: Lolium perenne, Trifolium repens, digestion, grazing, grazing time. Comportamento ingestivo e fermentação ruminal em vacas leiteiras em pasto de azevém com e sem trevo brancoResumo -O objetivo deste trabalho foi avaliar a influência da composição do dossel do pasto e da idade de rebrota sobre as relações entre as atividades de ingestão e a fermentação ruminal em vacas leiteiras, em pasto de azevém perene com ou sem trevo branco. Doze vacas da raça Holandesa, em final de lactação, fistuladas no rúmen, foram distribuídas em delineamento experimental de quadrado latino 4x4, com quatro períodos de 12 dias, em arranjo fatorial 2x2, com dois tipos de pasto -azevém perene em cultivo solteiro (AZ) e de azevém perene consorciado com trevo branco (TB) -e duas idades de rebrota. A distribuição diária do pastejo foi semelhante nos pastos AZ e TB, mas a concentração ruminal de ácidos graxos voláteis (AGV) foi maior e a proporção de propionato foi menor nos pastos em associação, ao longo do dia. A distribuição das atividades de pastejo foi semelhante nos pastos com idades diferentes. Entretanto, nos pastos mais velhos, o pH ruminal aumentou e a concentração de AGV diminuiu após a ordenha da tarde. O tempo de pastejo tem pouca influência sobre a fermentação ruminal, a qual depende de alterações que ocorrem à medida que os diferentes estratos são pastejados.Termos para indexação: Lolium perenne, Trifolium repens, digestão, pastejo, tempo de pastejo.

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Fermentation, degradation and microbial nitrogen partitioning for three forage colour phenotypes within anthocyanidin‐accumulating Lc‐alfalfa progeny

et al. 2012

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Species and variety of herbage affects release of cell contents during ingestive mastication in dairy cows fed indoors

Cited by 7 publications

References 35 publications

Characteristics of boli formed by dairy cows upon ingestion of fresh ryegrass, lucerne or chicory

Characteristics of boli formed by dairy cows upon ingestion of fresh ryegrass, lucerne or chicory

Foraging behavior and ruminal fermentation of dairy cows grazing ryegrass pasture alone or with white clover

Fermentation, degradation and microbial nitrogen partitioning for three forage colour phenotypes within anthocyanidin‐accumulating Lc‐alfalfa progeny

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