The effect of concentrate supplements differing in ruminal protein degradability on milk production and blood metabolite concentrations of dairy cows grazing perennial ryegrass pasture

2000 ◽  
Vol 64 (2-3) ◽  
pp. 183-191 ◽  
Author(s):  
F.P O’Mara ◽  
J.J Murphy ◽  
M Rath
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Perennial Ryegrass ◽  
Blood Metabolite ◽  
Metabolite Concentrations ◽  
Ruminal Protein Degradability ◽  
Protein Degradability

scholarly journals Effect of precalving and postcalving dietary energy level on performance and blood metabolite concentrations of dairy cows throughout lactation

2011 ◽  
Vol 94 (2) ◽  
pp. 808-823 ◽  
Author(s):  
R.A. Law ◽  
F.J. Young ◽  
D.C. Patterson ◽  
D.J. Kilpatrick ◽  
A.R.G. Wylie ◽  
...  
Keyword(s):  
Energy Level ◽  
Dairy Cows ◽  
Dietary Energy ◽  
Blood Metabolite ◽  
Metabolite Concentrations

The effect of perennial ryegrass ploidy and white clover inclusion on milk production of dairy cows

2020 ◽  
Vol 60 (1) ◽  
pp. 143 ◽  
Author(s):  
Bríd McClearn ◽  
Trevor Gilliland ◽  
Clare Guy ◽  
Michael Dineen ◽  
Fergal Coughlan ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Perennial Ryegrass ◽  
White Clover ◽  
Application Rate ◽  
Dairy Farmers ◽  
Increase Milk Production ◽  
Grazing Systems ◽  
Fertiliser Application ◽  
Grazing Dairy Cows

Grazed grass is considered the cheapest feed available for dairy cows in temperate regions, and to maximise profits, dairy farmers must utilise this high-quality feed where possible. Recent research has reported that including white clover (Trifolium repens L.) in grass swards can have a positive effect on milk production. The aim of the present study was to quantify the effect of tetraploid and diploid perennial ryegrass (Lolium perenne L.; PRG) swards sown with and without white clover on the milk production of grazing dairy cows. Four grazing treatments were used for the study; tetraploid-only PRG swards, diploid-only PRG swards, tetraploid PRG with white clover swards and diploid PRG with white clover swards. Thirty cows were assigned to each treatment and swards were rotationally grazed at a stocking rate of 2.75 cows/ha and a nitrogen-fertiliser application rate of 250 kg/ha annually. There was no significant effect of ploidy on milk production. Over the present 4-year study, cows grazing the PRG–white clover treatments had greater milk yields (+597 kg/cow.year) and milk-solid yield (+48 kg/cow.year) than cows grazing the PRG-only treatments. This significant increase in milk production suggests that the inclusion of white clover in grazing systems can be effectively used to increase milk production of grazing dairy cows.

The effects of bacterial inoculation of unwilted and wilted grass silages on digestibility by sheep and intake and performance by dairy cows

1996 ◽  
Vol 1996 ◽  
pp. 66-66
Author(s):  
T. Yan ◽  
D.C. Patterson ◽  
F.J. Gordon
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Perennial Ryegrass ◽  
Bacterial Inoculation ◽  
Bacterial Inoculants ◽  
And Performance ◽  
Two Parameters

In a previous study carried out at this Institute the application of a bacterial inoculant to unwilted grass at ensiling produced significant increases in silage DM intake and milk production across 3 harvests, while the use of the inoculant with wilted grass silages indicated no benefits in those two parameters (Yan, Patterson and Gordon, 1995). The reason for the lack of improvement when the inoculant was used with wilted grass silages was unclear, but could partially reflect greater potential rates of aerobic deterioration with wilted inoculated than wilted untreated silages during the feeding-out period. The present study was designed to further investigate the effects of inoculation of both unwilted and wilted grass silages.A set of four silages, comprising unwilted and wilted material, both with and without application of one of four bacterial inoculants at ensiling, was prepared from perennial ryegrass swards on each of 8 harvesting occasions during 1994.

Feeding diets with fodder beet decreased methane emissions from dry and lactating dairy cows in grazing systems

2017 ◽  
Vol 57 (7) ◽  
pp. 1445 ◽  
Author(s):  
Arjan Jonker ◽  
David Scobie ◽  
Robyn Dynes ◽  
Grant Edwards ◽  
Cecile De Klein ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Perennial Ryegrass ◽  
Pastoral Systems ◽  
Hordeum Vulgare L ◽  
Fodder Beet ◽  
Ch4 Emissions ◽  
Lactating Cows ◽  
Carbohydrate Concentration ◽  
Lactating Dairy Cows

Fodder beet (Beta vulgaris L.) has a very high readily fermentable carbohydrate concentration, which could affect rumen fermentation and reduce enteric methane (CH4) emissions. The objective of the current study was to estimate CH4 emissions from dry dairy cows grazing either fodder beet supplemented with perennial ryegrass (Lolium perenne L.)-dominated pasture silage (6 kg DM/cow/day; FB+Sil) or forage kale (Brassica oleracea L.) supplemented with barley (Hordeum vulgare L.) straw (3 kg DM/cow/day; kale+Str; dry cows, Experiment 1), and from dairy cows in early lactation grazing perennial ryegrass-dominated pasture alone (pasture) or supplemented with fodder beet bulbs (3 kg DM/cow/day; past+FB; lactating cows; Experiment 2). Methane measurements were performed using GreenFeed units (C-Lock Inc., Rapid City, SD, USA) for 40 days in August–September 2015 (Experiment 1) and for 22 days in November–December 2015 (Experiment 2), from 45 and 31 Holstein–Friesian × Jersey dairy cows in Experiments 1 and 2, respectively. Dry cows grazing FB+Sil in Experiment 1 produced 18% less CH4 (g/day) and had 28% lower CH4 yield (g/kg DM intake; P < 0.001) than did cows grazing kale+Str. Lactating cows grazing past+FB in Experiment 2 produced 18% less CH4 and had 16% lower CH4 intensity (g/kg fat and protein-corrected milk production; P < 0.01) than did cows grazing pasture alone, while milk production and composition were similar for the two groups. In conclusion, feeding fodder beet at ~50% and 20% of the diet of dry and lactating dairy cows in pastoral systems can mitigate CH4 emissions.

scholarly journals Correlation of blood metabolite concentrations and body condition scores with persistent postpartum uterine bacterial infection in dairy cows

2016 ◽  
Vol 62 (5) ◽  
pp. 457-463 ◽  
Author(s):  
Mohamed Elshabrawy GHANEM ◽  
Erisa TEZUKA ◽  
Kouya SASAKI ◽  
Masahiro TAKAHASHI ◽  
Norio YAMAGISHI ◽  
...  
Keyword(s):  
Bacterial Infection ◽  
Dairy Cows ◽  
Body Condition ◽  
Blood Metabolite ◽  
Metabolite Concentrations ◽  
Body Condition Scores

Milk production of ewes rearing single and twin lambs at two times of year and associated plasma insulin, prolactin and blood metabolite concentrations

1984 ◽  
Vol 1984 ◽  
pp. 14-14
Author(s):  
J. Bass ◽  
J.M. Doney ◽  
S.M. Rhind
Keyword(s):  
Milk Production ◽  
Plasma Insulin ◽  
Blood Metabolites ◽  
Seasonal Differences ◽  
Blood Metabolite ◽  
Metabolite Concentrations ◽  
Nutrient Partitioning ◽  
Endocrine Status

While the functions of many hormones controlling milk production are known, there is little information concerning the inter-relationships between different hormones and between hormones and blood metabolites. The aim of this work was to investigate milk production, endocrine status and associated nutrient partitioning throughout lactation, in Greyface ewes rearing either single or twin lambs. Experiments were performed with ewes lambing in January and April. The seasonal differences in prolactin concentrations permits investigation of the importance of differences in concentrations of this hormone in the control of nutrient partitioning and milk production.

Sign in / Sign up

Export Citation Format

Share Document