scholarly journals Influence of Fiber Content and Concentrate Level on Chewing Activity, Ruminal Digestion, Digesta Passage Rate and Nutrient Digestibility in Dairy Cows in Late Lactation

2005 ◽  
Vol 18 (8) ◽  
pp. 1116-1124 ◽  
Author(s):  
M. Tafaj ◽  
V. Kolaneci ◽  
B. Junck ◽  
A. Maulbetsch ◽  
H. Steingass ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Nutrient Digestibility ◽  
Fiber Content ◽  
Passage Rate ◽  
Digesta Passage ◽  
Ruminal Digestion ◽  
Concentrate Level ◽  
Chewing Activity

Fermentation and degradation in the rumen of dairy cows fed on diets consisting of silage from an intensively managed sward and silages from semi-natural grasslands

2004 ◽  
Vol 142 (1) ◽  
pp. 79-88 ◽  
Author(s):  
M. H. BRUINENBERG ◽  
H. VALK ◽  
P. C. STRUIK ◽  
A. M. VAN VUUREN
Keyword(s):  
Fatty Acids ◽  
Dairy Cows ◽  
Clearance Rate ◽  
Volatile Fatty Acids ◽  
Grassland Management ◽  
Pool Size ◽  
Passage Rate ◽  
Natural Grasslands ◽  
Intensively Managed ◽  
Ruminal Digestion

To assess the effect of grassland management on the ruminal digestion of silages, four lactating dairy cows, fitted with a rumen cannula, were fed diets consisting of concentrates and different grass silages. The grass silages consisted of intensively managed grass (IM) in variable proportions replaced by silages harvested from a ‘species-poor’ grassland managed to stimulate nesting of birds (SPP) or from a grassland managed to increase plant species diversity (SPR). The roughage part of the diets was composed completely of IM (100IM), or 200 g/kg (in dry matter) of IM replaced by SPP (20SPP) or 600 g/kg of IM replaced by SPP (60SPP), or SPR (60SPR). The pH in the rumen was highest on 60SPR and lowest on 100IM and 20SPP (P<0·05), whereas volatile fatty acids (VFA) concentrations were lowest on 60SPP and 60SPR and highest on 100IM (P<0·05). No differences in the ratio non-glucogenic: glucogenic volatile fatty acids were observed among the diets. The NH3 concentration was highest on 100IM and 20SPP and lowest on 60SPR (P<0·05), reflecting differences in CP intake. The concentration of uric acid in the urine (mg per kg metabolic body weight) was highest on 100IM (P<0·05). Rumen pool size of OM and DM did not differ among treatments, but pool size of NDF and IADF were highest on 60SPR (P<0·05). Passage rate was high on 100IM and 60SPR, but no significant differences with the other treatments were established. Also, no significant differences were observed in rates of degradation. Clearance rate of large particles was highest on 60SPP and differed significantly from 60SPR (P<0·05) only. No differences were observed in clearance rate of small particles. In conclusion, for most rumen fermentation characteristics measured in the study, no noticeably aberrant behaviour of the silages from semi-natural grassland was observed.

scholarly journals Effects of viscosity and fermentability of dietary fibre on nutrient digestibility and digesta characteristics in ileal-cannulated grower pigs

2011 ◽  
Vol 106 (5) ◽  
pp. 664-674 ◽  
Author(s):  
Seema Hooda ◽  
Barbara U. Metzler-Zebeli ◽  
Thavaratnam Vasanthan ◽  
Ruurd T. Zijlstra
Keyword(s):  
Dietary Fibre ◽  
Crude Protein ◽  
Latin Square ◽  
Strong Relationship ◽  
Nutrient Digestibility ◽  
Curvilinear Relationship ◽  
Passage Rate ◽  
Ileal Digestibility ◽  
Digesta Viscosity ◽  
Digesta Passage

Relative contributions of two functional properties, viscosity and fermentability of dietary fibre, on apparent ileal digestibility (AID), apparent total tract digestibility (ATTD), digesta passage rate, N retention and SCFA concentration have not been established. Thus, eight ileal-cannulated pigs randomised in a double 4 × 4 Latin square were fed four diets based on maize starch and casein supplemented with 5 % of actual fibre in a 2 × 2 factorial arrangement: low-fermentable, low-viscous cellulose (CEL); low-fermentable, high-viscous carboxymethylcellulose (CMC); high-fermentable, low-viscous oat β-glucan (LBG); high-fermentable, high-viscous oat β-glucan (HBG). Viscosity and fermentability interacted to affect (P < 0·001) digesta viscosity and AID and ATTD of nutrients. These properties tended to interact to affect (P < 0·10) digesta passage rate and butyrate. Pigs fed the CMC diet had the lowest (P < 0·05) digesta passage rate and the highest (P < 0·001) AID of energy, crude protein and DM, and ATTD of energy and DM. Post-ileal DM digestibility was highest (P < 0·001) for pigs fed the CEL and HBG diets. Post-ileal DM digestibility had a negative, curvilinear relationship with the AID of energy and crude protein (R2 0·85 and 0·72, respectively; P < 0·001). Digesta viscosity had a less strong relationship with the AID of energy and crude protein (R2 0·45 and 0·36, respectively; P < 0·001). In conclusion, high-viscous, low-fermentable dietary fibre increases the proportion of a diet that is digested in the small intestine by reducing digesta passage rate.

scholarly journals Silage Chop Length and Hay Supplementation on Milk Yield, Chewing Activity, and Ruminal Digestion by Dairy Cows

2006 ◽  
Vol 89 (9) ◽  
pp. 3599-3608 ◽  
Author(s):  
J.J. Couderc ◽  
D.H. Rearte ◽  
G.F. Schroeder ◽  
J.I. Ronchi ◽  
F.J. Santini
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Ruminal Digestion ◽  
Chewing Activity

scholarly journals Effect of a different concentrate-forage sequence on digesta passage rate, faeces traits and milk features of dairy cows

2007 ◽  
Vol 6 (sup1) ◽  
pp. 257-259
Author(s):  
G. Bertoni ◽  
P. Bani ◽  
M.G. Maianti ◽  
R. Lombardelli ◽  
L. Sarti
Keyword(s):  
Dairy Cows ◽  
Passage Rate ◽  
Digesta Passage

scholarly journals Change of digesta passage rate in dairy cows after different acute stress situations

2007 ◽  
Vol 6 (sup1) ◽  
pp. 377-379 ◽  
Author(s):  
E. Trevisi ◽  
R. Lombardelli ◽  
A. Minuti ◽  
G. Bertoni
Keyword(s):  
Dairy Cows ◽  
Acute Stress ◽  
Passage Rate ◽  
Digesta Passage

0459 Effect of digestible fiber content of barley silage on lactation performance and chewing activity of lactating dairy cows in comparison with corn silage

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 219-219
Author(s):  
B. Refat ◽  
D. A. Christensen ◽  
J. J. McKinnon ◽  
J. Nair ◽  
A. D. Beattie ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Fiber Content ◽  
Corn Silage ◽  
Lactation Performance ◽  
Lactating Dairy Cows ◽  
Barley Silage ◽  
Chewing Activity
Sign in / Sign up

Export Citation Format

Share Document