Short Communication: Effects of feeding Falcon or Tyto whole plant barley silage on milk production and feed efficiency

2014 ◽  
Vol 94 (1) ◽  
pp. 151-153 ◽  
Author(s):  
M. Oba ◽  
M. L. Swift
Keyword(s):  
Milk Production ◽  
Feed Efficiency ◽  
Short Communication ◽  
Lactating Cows ◽  
Lactating Dairy Cows ◽  
Communication Effects ◽  
Whole Plant ◽  
Important Quality ◽  
Barley Silage

Oba, M. and Swift, M. L. 2014. Short Communication: Effects of feeding Falcon or Tyto whole plant barley silage on milk production and feed efficiency. Can. J. Anim. Sci. 94: 151–153. Eight lactating dairy cows were fed diets containing either Falcon or Tyto whole-plant barley silage (Hordeum vulgare; WPBS) in a crossover design to study effects on milk production and feed efficiency. The in vitro fibre digestibility (IVFD) of Falcon and Tyto WPBS was 61.6 and 57.2%, respectively. Cows consuming the Falcon WPBS utilized feed more efficiently compared with those consuming the Tyto WPBS (1.44 vs. 1.32 kg milk kg−1dry matter intake) although milk yield was not affected. This research demonstrates that IVFD may be an important quality indicator of WPBS when balancing diets for high producing lactating cows.

scholarly journals Short communication: Effects of dietary addition of N-carbamoylglutamate on milk composition in mid-lactating dairy cows

2018 ◽  
Vol 101 (12) ◽  
pp. 10985-10990 ◽  
Author(s):  
F.F. Gu ◽  
S.L. Liang ◽  
Z.H. Wei ◽  
C.P. Wang ◽  
H.Y. Liu ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Short Communication ◽  
Milk Composition ◽  
Lactating Dairy Cows ◽  
Communication Effects

Effects of sources of carbohydrate and protein given at low levels with grass silage ad libitum on the performance of lactating dairy cows

1995 ◽  
Vol 1995 ◽  
pp. 163-163
Author(s):  
K. Aston ◽  
R.J. Dewhurst ◽  
W.J. Fisher ◽  
D.W.R. Davies ◽  
A.B. McAllan
Keyword(s):  
Milk Production ◽  
Live Weight ◽  
Rapeseed Meal ◽  
Grass Silage ◽  
Lactating Cows ◽  
Lactating Dairy Cows ◽  
Production Experiment ◽  
Low Levels ◽  
Main Effects ◽  
Degradable Protein

An effective strategy for milk production is to supplement silage with small amounts of high-protein concentrate based on mixed carbohydrate sources and fish and soyabean meals (Aston et al 1992). Recent work at Trawsgoed by Sargeant and McAllan (1993) using growing steers given high-digestibility grass silage supplemented with rapeseed meal (a source of highly rumen degradable protein) produced similar live-weight gains to those obtained with fish meal. Jacobs and McAllan (1992) concluded that microbial protein yield is greater when the more degradable protein source is given, indicating a better balance in the supply of nitrogen and energy nutrients within the rumen. Lactating cows given grass silage diets have a high requirement for Metabolisable Protein (MP). The source of rumen fermentable carbohydrate may be important when MP supply is derived from degradable dietary protein and hence microbial growth. This study therefore examined the effects of varying the sources of carbohydrate and protein in low levels of concentrate given with high-digestibility grass silage. The main effects observed in the milk production experiment are presented here.

The effects of anAspergillus oryzaeextract containing alpha-amylase activity on ruminal fermentation and milk production in lactating Holstein cows

2005 ◽  
Vol 81 (3) ◽  
pp. 365-374 ◽  
Author(s):  
J. M. Tricarico ◽  
J. D. Johnston ◽  
K. A. Dawson ◽  
K. C. Hanson ◽  
K. R. McLeod ◽  
...  
Keyword(s):  
Milk Production ◽  
Amylase Activity ◽  
Latin Square ◽  
Alpha Amylase ◽  
Holstein Cows ◽  
Ruminal Fermentation ◽  
Nutrient Metabolism ◽  
Lactating Cows

AbstractThe effects of anAspergillus oryzaeextract containing alpha-amylase activity (Amaize™, Alltech Inc., Nicholasville, KY) were examinedin vivoandin vitro. A lactating cow study employed 20 intact and four ruminally fistulated Holstein cows in a replicated 4 × 4 Latin-square design to examine the effects of four concentrations of dietary Amaize™ extract on milk production and composition, ruminal fermentation and serum metabolite concentrations. The treatment diets contained 0, 240, 480 or 720 alpha-amylase dextrinizing units (DU) per kg of total mixed ration (TMR) (dry-matter basis). The supplemental alpha-amylase increased the yields of milk (P= 0·02), fat (P= 0·02) and protein (P= 0·06) quadratically. The maximum milk yield was obtained when 240 DU per kg of TMR were offered. Ruminalin situstarch disappearance was not affected by alpha-amylase supplementation in lactating cows or ruminally cannulated steers. Supplemental alpha-amylase extract reduced the molar proportion of propionate in the rumen of steers (P= 0·08) and lactating cows (P= 0·04), and in rumen-simulating cultures (P= 0·04). The supplement also increased the molar proportions of acetate (P= 0·06) and butyrate (P= 0·05), and the serum beta-hydroxybutyrate (P= 0·01) and non-esterified fatty acid (P= 0·03) concentrations in lactating cows. The improvements in milk production appear to be a consequence of the effects of alpha-amylase on ruminal fermentation and the potential changes in nutrient metabolism that result from them. We conclude that supplemental alpha-amylase may be given to modify ruminal fermentation and improve milk and component yield in lactating Holstein cattle.

Effects of sources of carbohydrate and protein given at low levels with grass silage ad libitum on the performance of lactating dairy cows

1995 ◽  
Vol 1995 ◽  
pp. 163-163
Author(s):  
K. Aston ◽  
R.J. Dewhurst ◽  
W.J. Fisher ◽  
D.W.R. Davies ◽  
A.B. McAllan
Keyword(s):  
Milk Production ◽  
Live Weight ◽  
Rapeseed Meal ◽  
Grass Silage ◽  
Lactating Cows ◽  
Lactating Dairy Cows ◽  
Production Experiment ◽  
Low Levels ◽  
Main Effects ◽  
Degradable Protein

An effective strategy for milk production is to supplement silage with small amounts of high-protein concentrate based on mixed carbohydrate sources and fish and soyabean meals (Aston et al 1992). Recent work at Trawsgoed by Sargeant and McAllan (1993) using growing steers given high-digestibility grass silage supplemented with rapeseed meal (a source of highly rumen degradable protein) produced similar live-weight gains to those obtained with fish meal. Jacobs and McAllan (1992) concluded that microbial protein yield is greater when the more degradable protein source is given, indicating a better balance in the supply of nitrogen and energy nutrients within the rumen. Lactating cows given grass silage diets have a high requirement for Metabolisable Protein (MP). The source of rumen fermentable carbohydrate may be important when MP supply is derived from degradable dietary protein and hence microbial growth. This study therefore examined the effects of varying the sources of carbohydrate and protein in low levels of concentrate given with high-digestibility grass silage. The main effects observed in the milk production experiment are presented here.

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.

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