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Cited by 133Ruminant Nutrition and Digestive PhysiologyPasture and Agricultural SystemsAnimal Nutrition and Physiology

Particle breakdown and rumen digestion of fresh ryegrass (Lolium perenne L.) and lucerne (Medicago sativa L.) fed to cows during a restricted feeding period

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Waghorn, G. C., Shelton, I. D., Thomas, V. J.·1989·British Journal of Nutrition
DOI 10.1079/bjn19890127
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Abstract

1. Five rumen-fistulated cows were given freshly cut ryegrass (Lolium perenne L.) and lucerne (Medicago sativa L.), on separate occasions, to compare rates of particle breakdown and aspects of rumen fermentation. 2. Cattle were required to consume their daily allowance (offered ad lib.) in two 2 h feeding periods daily. 3. During the first 2 h feeding period, dry matter (DM) intakes of ryegrass (4.75 kg) and lucerne (4.85 kg) were similar. Eating reduced 46% of ryegrass and 61 % of lucerne to a size able to pass a 2 mm sieve (P < 0.001). Rumen DM particles retained on the 2 and 4 mm sieves had a low probability of passage out of the rumen, and accounted for only 6 % of faecal DM with both feeds. 4. Ryegrass was cleared from the rumen more slowly than lucerne. During eating, rumen DM particles which could not pass the 2 mm sieve increased from 323 to 511 g/kg for ryegrass and from 201 to 389 g/kg for lucerne. The rate of particle size reduction for lucerne stem was similar to that for ryegrass. 5. When lucerne was eaten the increases in rumen volatile fatty acid (VFA) and ammonia concentrations were much greater than for ryegrass (P < 0.001). The proportions of plant chlorophyll released during eating were similar for both feeds (0.570 and 0.607), but 2 h after eating 22.3 g had been released from lucerne (79.1 %) compared with 15.0 g from ryegrass (63.8%). The flux of water from the rumen to the omasum was similar for ryegrass (10.2 litres/h) and lucerne (12.7 litres/h) during eating, but declined to 6.0 litres/h after eating with the lucerne diet.

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  • In general, a positive relationship exists between forage intake and forage digestibility.

    “In general, a positive relationship exists between forage intake and forage digestibility.87 -89”

    From Nutritive value of maize silage in relation to dairy cow performance and milk quality (2015) · cites this paper as [88]

    The Chemical analyses of feeds section reports similar dry-matter intakes for ryegrass and lucerne, while Particle size reduction and clearance discusses rumen clearance and fermentation. Neither section establishes a general positive relationship between forage intake and forage digestibility; searches for 'digestibility' and 'intake and digestibility' found no passage stating it. Page numbers were unavailable in our copy. (LLM, conf=0.74)

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Authors
Waghorn, G. C., Shelton, I. D., & Thomas, V. J.
Venue
British Journal of Nutrition
Publisher
Cambridge University Press (CUP)
Published
1989-03
Volume
61
Issue
2
Pages
409-423
ISSN
  • 0007-1145 (ISSN-L)
  • 1475-2662
DOI
10.1079/bjn19890127
OpenAlex
W2020593238
Semantic Scholar
b7425b0df5dd50463f05e664c11112d10ec99b31
Cited by
133
References
6
Citations by year
2025: 2 · 2023: 1 · 2022: 3 · 2021: 5 · 2020: 5 · 2019: 2 · 2018: 4 · 2017: 4 · 2016: 7 · 2015: 4 · 2014: 7 · 2013: 3 · 2012: 3
FWCI
6.00
Type
journal article
Language
en
Open access
Licence
www.cambridge.org/core/terms (unspecified, 6582 d)
Locations
  • British Journal Of Nutrition (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Ruminant Nutrition and Digestive Physiology
  • Life Sciences › Agricultural and Biological Sciences › Forestry › Pasture and Agricultural Systems
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
Keywords
particle breakage, rumen digestion, ryegrass, alfalfa, perennial ryegrass, feed restriction, feeding frequency, rumen fermentation, volatile fatty acids, ammonia, dry matter intake
MeSH terms
Medicago sativa, Ammonia, Animals, Animal Feed, Body Water, Cattle, Chlorophyll, Digestion, Fatty Acids, Volatile, Gastrointestinal Contents, Gastrointestinal Transit, Poaceae, Hydrogen-Ion Concentration, Lolium, Rumen

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