scholarly journals Effects of Varying Dietary Forage Particle Size in Two Concentrate Levels on Chewing Activity, Ruminal Mat Characteristics, and Passage in Dairy Cows

2007 ◽  
Vol 90 (4) ◽  
pp. 1929-1942 ◽  
Author(s):  
Q. Zebeli ◽  
M. Tafaj ◽  
I. Weber ◽  
J. Dijkstra ◽  
H. Steingass ◽  
...  
Keyword(s):  
Particle Size ◽  
Dairy Cows ◽  
Chewing Activity

Effects of lucerne hay and barley grain particle sizes on chewing activity, rumen pH and milk composition of Holstein dairy cows

2007 ◽  
Vol 2007 ◽  
pp. 130-130
Author(s):  
A.R. Bayat ◽  
R. Valizadeh ◽  
A.A. Nasserian
Keyword(s):  
Particle Size ◽  
Dairy Cows ◽  
Milk Fat ◽  
Milk Composition ◽  
Barley Grain ◽  
Particle Sizes ◽  
Milk Fat Depression ◽  
Rumen Ph ◽  
Maize Grain ◽  
Chewing Activity

NRC (2001) recommended 250 g/kg dietary neutral detergent fibre (NDF) with a minimum of 190 g/kg dietary forage NDF to prevent milk fat depression. This recommendation does not account for the differences in forage particle size. The forage particle size requirements of dairy cows fed barley grain-based diets can differ from those fed maize grain-based diets (Yang and Beauchemin, 2006). The objective of this experiment was to evaluate the effects of lucerne hay and barley grain particle sizes on chewing activity, rumen pH, milk yield and milk composition using barley grain-based diets.

scholarly journals Effect of Total Mixed Ration Particle Size on Rumen pH, Chewing Activity, and Performance in Dairy Cows

2003 ◽  
Vol 16 (12) ◽  
pp. 1755-1762 ◽  
Author(s):  
M. M. Schroeder ◽  
H. W. Soita ◽  
D. A. Christensen ◽  
G. R. Khorasani ◽  
J. J. Kennelly
Keyword(s):  
Particle Size ◽  
Dairy Cows ◽  
Total Mixed Ration ◽  
Rumen Ph ◽  
And Performance ◽  
Chewing Activity

scholarly journals Effects of Alfalfa Particle Size and Specific Gravity on Chewing Activity, Digestibility, and Performance of Holstein Dairy Cows

2004 ◽  
Vol 87 (11) ◽  
pp. 3912-3924 ◽  
Author(s):  
A. Teimouri Yansari ◽  
R. Valizadeh ◽  
A. Naserian ◽  
D.A. Christensen ◽  
P. Yu ◽  
...  
Keyword(s):  
Particle Size ◽  
Specific Gravity ◽  
Dairy Cows ◽  
And Performance ◽  
Chewing Activity ◽  
Holstein Dairy Cows

The effect of reducing alfalfa hay cut length on TMR particle size distribution, rumen pH and chewing activity of cows in early lactation using Penn State Particles Separator(PSPS)

2005 ◽  
Vol 2005 ◽  
pp. 75-75
Author(s):  
A. Khezri ◽  
A. Nikkhah ◽  
A. Zare Shahneh ◽  
M. H. Fooladi
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Rumen Ph ◽  
Alfalfa Hay ◽  
Penn State ◽  
Nutritional Needs ◽  
Particle Length ◽  
Chewing Activity ◽  
Proper Length

The ability of a ration to meet the nutritional needs of a high yielding dairy cow requires understanding of both the chemical and physical characteristics of the ration (NRC, 2001). Having the proper particle size distribution (2 to 8 percent of the particles on the upper sieve, 30 to 50 percent on the middle and lower sieves, and no more than 20 percent on the bottom pan) of feeds is an important part of ration formulation. Chopping the crop at the proper length produces forages that can be combined to achieve the desired particle length in a TMR. The dairy cow’s need for increasingly higher levels of energy have led to diets relatively high in concentrates. However, cows still require adequate fibre in the ration to function properly (Allen, 2000). Adequate forage particle length is necessary for proper rumen function and reduced forage particle size has been shown to decrease the time spent chewing and cause a trend toward decreased rumen pH. When cows spend less time chewing, they produce less saliva, which is needed to buffer the rumen. The objective of this study was to evaluate the effects of reducing alfalfa hay length of cut on TMR particle size distribution, rumen pH and chewing activity using penn state particles separator.

scholarly journals Milk Fat Depression in Dairy Cows: Role of Particle Size of Alfalfa Hay

1990 ◽  
Vol 73 (7) ◽  
pp. 1823-1833 ◽  
Author(s):  
R.J. Grant ◽  
V.F. Colenbrander ◽  
D.R. Mertens
Keyword(s):  
Particle Size ◽  
Dairy Cows ◽  
Milk Fat ◽  
Milk Fat Depression ◽  
Alfalfa Hay

scholarly journals Effect of straw particle size on the behavior, health, and production of early-lactation dairy cows

2018 ◽  
Vol 101 (7) ◽  
pp. 6375-6387 ◽  
Author(s):  
R.E. Coon ◽  
T.F. Duffield ◽  
T.J. DeVries
Keyword(s):  
Particle Size ◽  
Dairy Cows ◽  
Early Lactation ◽  
Behavior Health

scholarly journals Feeding forages with reduced particle size in a total mixed ration improves feed intake, total-tract digestibility, and performance of organic dairy cows

2019 ◽  
Vol 102 (10) ◽  
pp. 8839-8849 ◽  
Author(s):  
Andreas Haselmann ◽  
Katharina Zehetgruber ◽  
Birgit Fuerst-Waltl ◽  
Werner Zollitsch ◽  
Wilhelm Knaus ◽  
...  
Keyword(s):  
Particle Size ◽  
Dairy Cows ◽  
Feed Intake ◽  
Total Mixed Ration ◽  
Organic Dairy ◽  
And Performance
Sign in / Sign up

Export Citation Format

Share Document