Feeding hay rich in water-soluble carbohydrates improves ruminal pH without affecting rumination and systemic health in early lactation dairy cows

2018 ◽  
Vol 103 (2) ◽  
pp. 466-476 ◽  
Author(s):  
Fenja Klevenhusen ◽  
Maria-Theresia Kleefisch ◽  
Qendrim Zebeli
Keyword(s):  
Dairy Cows ◽  
Water Soluble ◽  
Soluble Carbohydrates ◽  
Early Lactation ◽  
Ruminal Ph ◽  
Water Soluble Carbohydrates ◽  
Systemic Health

Milk production and N partitioning in early lactation dairy cows offered perennial ryegrass containing a high concentration of water soluble carbohydrates

2001 ◽  
Vol 2001 ◽  
pp. 6-6 ◽  
Author(s):  
J. M. Moorby ◽  
L. A. Miller ◽  
R. T. Evans ◽  
N. D. Scollan ◽  
M. K. Theodorou ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Protein Production ◽  
Water Soluble ◽  
Soluble Carbohydrates ◽  
Early Lactation ◽  
High Concentration ◽  
Waste Products ◽  
N Partitioning ◽  
Water Soluble Carbohydrates

The efficiency of utilisation of grass nitrogen for milk protein production tends to be low, because rumen fermentable energy sources limit the amount of diet amino acids that are incorporated into microbial protein. As a consequence, absorption of ammonia from the rumen and excretion of high-N waste products is considerable. Previous studies (Miller et al., 1999) have shown that the efficiency of use of feed N can be increased in late-lactation dairy cows by feeding ryegrass bred to contain a high concentration of water soluble carbohydrates (WSC). The objective of this study was to investigate milk production and N partitioning in early lactation dairy cows using the same high WSC ryegrass variety, AberDove.

Milk production and composition of dairy cows grazing two perennial ryegrass cultivars allocated in the morning and afternoon

2017 ◽  
Vol 57 (7) ◽  
pp. 1507 ◽  
Author(s):  
A. Chen ◽  
R. H. Bryant ◽  
G. R. Edwards
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Perennial Ryegrass ◽  
Nutritive Value ◽  
Morphological Characteristics ◽  
Ground Level ◽  
Water Soluble ◽  
Soluble Carbohydrates ◽  
Above Ground Level ◽  
Water Soluble Carbohydrates

The objective of the study was to evaluate the effect of perennial ryegrass cultivar and timing of herbage allocation on herbage nutritive value and milk production of mid-lactation dairy cows. An autumn grazing trial using 48 Friesian × Jersey spring-calving cows was conducted over 10 days. Twelve groups of four cows were allocated to three replicates of four treatments, namely, two perennial ryegrass cultivars (AberMagic or Prospect) offered either after milking in the morning (0830 hours) or afternoon (1630 hours). Cows were offered a daily herbage allowance of 30 kg DM/cow above ground level. There were no significant differences in sward structure and morphological characteristics between cultivars, except for Prospect having a lower average tiller mass (43.1 mg) than AberMagic (48.4 mg). The concentration of water-soluble carbohydrates (WSC) and organic matter digestibility in DM (DOMD) was greater in AberMagic (180 g/kg, 74.2%) than in Prospect (153 g/kg, 71.4%). Herbage DM percentage, WSC concentration and DOMD were lower in the morning than in the afternoon (18.8% vs 22.3% DM; 154 vs 179 g/kg WSC; 72.1% vs 73.5% DOMD). Herbage DM intake (12.0 kg/cow.day), milk yield (17.2 kg/cow.day) and milksolids yield (1.60 kg/cow.day) did not differ significantly among treatments. Cultivar choice and timing of allocation influenced herbage WSC concentration and digestibility, but did not alter milksolids production.

scholarly journals Milk Production, Milk Quality, and Behaviour of Dairy Cows Grazing on Swards with Low and High Water-Soluble Carbohydrates Content in Autumn: A Pilot Trial

Animals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1012 ◽  
Author(s):  
Verónica M. Merino ◽  
Oscar A. Balocchi ◽  
M. Jordana Rivero
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Pilot Trial ◽  
High Water ◽  
Nutritional Composition ◽  
Water Soluble ◽  
Soluble Carbohydrates ◽  
High Sugar ◽  
Fertilisation Rate ◽  
Water Soluble Carbohydrates

Grazing ruminant systems can be sustainably intensified by improving efficiency while reducing their environmental impact. The objective of the present study was to examine the potential of pastures differing in water-soluble carbohydrates (WSC) and crude protein (CP) contents to affect milk production and composition as well as the behaviour of cows grazing perennial ryegrass (PRG) swards. By modifying the nitrogen (N) fertilisation rate (83 and 250 kg/ha per year) and the defoliation frequency (two or three leaves per tiller) in combination with cultivar selection (high-sugar vs. standard cultivars), we obtained two swards differing in WSC and CP contents. The two contrasting swards were each grazed by six dairy cows in nine daily strips in autumn. Pasture samples were collected to determine herbage mass and quality. Cow behaviour was recorded by direct observation. Herbage offered and apparently consumed were similar between swards (averaging 37.3 and 18.2 kg/cow, respectively), although the residual was lower in the high-sugar sward (1735 vs. 2143 kg/ha). Cows spent less time grazing in the high-sugar sward (66.9% v. 71.6%), but the rumination times was similar (14.6%). Milk production and composition were similar between groups, suggesting that high-quality pastures would require a greater difference in nutritional composition to affect animal performance.

Sign in / Sign up

Export Citation Format

Share Document