Microbial composition and omasal flows of bacterial, protozoal, and nonmicrobial amino acids in lactating dairy cows fed fresh perennial ryegrass (Lolium perenne L.) not supplemented or supplemented with rolled barley

Dineen, Michael; McCarthy, B.; Dillon, P.; Matthews, Chloe; Ross, Deborah; Amburgh, M.E. Van

doi:10.3168/jds.2020-19203

Cited by 5 publications

(1 citation statement)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…volatile fatty acids, AAs from microbial protein). To attain a greater understanding of the site of digestion and nutrient supply in Irish pasture-fed lactating dairy cows, digesta flow studies incorporating duodenal or omasal sampling were performed (O'Mara et al, 1997;Younge et al, 2004;Dineen et al, 2020Dineen et al, , 2021a. These studies have highlighted a number of key characteristics in regard to the nutritive value of pasture; immature pasture is highly digestible with the majority of digestion occurring prior to the omasum/ duodenum; extensive ruminal digestion of immature PRG N/ AA occurs suggesting that cows consuming such diets exhibit a large dependence on microbial AA to support metabolisable AA supply; measurement of the rumen pool size of cows fed highly digestible immature pasture indicates that rumen distension does not limit DMI; and consumption of immature pasture stimulates high ruminal liquid passage rate which may affect microbial metabolism and protein synthesis.…”

Section: Quantifying the Nutritive Value Of Pasturementioning

confidence: 99%

Developments in nutrition for pasture-based cattle and sheep systems in Ireland

Patton

Dineen

Keady

et al. 2022

Irish Journal of Agricultural and Food Research

Self Cite

View full text Add to dashboard Cite

For ruminant production systems, the requirement to meet specific nutrient targets in the animal’s diet must be balanced with the aim of achieving high utilisation of forage in the overall feed budget. A focus of research and extension in an Irish industry context has been to meet these objectives using grazed pasture as the predominant forage source. This has prompted investigation to improve understanding of the components defining forage nutritive value, as well as the management factors affecting its intake and utilisation by animals. Similarly, quantifying the animal performance responses to varying type, rate and timing of dietary supplementation has been an important area of investigation. This review summarises some of the principal outcomes and developments over recent years across beef, sheep and dairy production systems. In addition, ruminant production systems are increasingly challenged to reduce potential environmental impacts by mitigating nutrient and gaseous emissions across their production cycles. Current and emerging research with regard to this issue, and enteric methane production in particular, is discussed.

show abstract

Section: Quantifying the Nutritive Value Of Pasturementioning

confidence: 99%

Developments in nutrition for pasture-based cattle and sheep systems in Ireland

Patton

Dineen

Keady

et al. 2022

Irish Journal of Agricultural and Food Research

Self Cite

View full text Add to dashboard Cite

show abstract

Predicting fibre digestibility in Holstein dairy cows fed dry-hay-based rations through machine learning

Cavallini,

Raffrenato,

Mammi

et al. 2023

animal

View full text Add to dashboard Cite

Irish Grassland Research — main achievements and advancements in the past 60 yrs and where to progress to next

O’Donovan

Dillon

Conaghan

et al. 2022

Irish Journal of Agricultural and Food Research

Self Cite

View full text Add to dashboard Cite

In the last 60 yr Irish grassland production has increased substantially in no small part due to high-quality fundamental grassland research. Increased production from grassland has arisen from improved understanding (research and practice) of soil and plant nutrition, plant physiology and variety improvement, while improved understanding of feed evaluation, ruminant nutrition, grazing management and silage technology has contributed to increased utilisation of grassland. Annual grass DM production varies from 12.7 to 15.0 t DM/ha based on Department of Agriculture, Food and the Marine grass variety trials. More recent data from PastureBase Ireland indicate that average annual grass production (2020) on efficient dairy and dry stock farms is 13.5 and 10.0 t DM/ha, respectively. Ireland is now one of the world leaders in grassland research, particularly in the area of grazing utilisation, the development and use of grassland databases, decision support systems and grass selection indices for grass varieties. Future pasture-based systems must extend beyond food production to deliver additional benefits to farmers, to consumers and the wider society. Future systems will require more robust grazing animals with healthier functional traits, more diverse swards supporting improved animal performance and require fewer fertiliser and chemical inputs, and will support more biodiversity and enhanced carbon storage.

show abstract

Microbial composition and omasal flows of bacterial, protozoal, and nonmicrobial amino acids in lactating dairy cows fed fresh perennial ryegrass (Lolium perenne L.) not supplemented or supplemented with rolled barley

Cited by 5 publications

References 59 publications

Developments in nutrition for pasture-based cattle and sheep systems in Ireland

Developments in nutrition for pasture-based cattle and sheep systems in Ireland

Predicting fibre digestibility in Holstein dairy cows fed dry-hay-based rations through machine learning

Irish Grassland Research — main achievements and advancements in the past 60 yrs and where to progress to next

Contact Info

Product

Resources

About