Supplementing barley or rapeseed meal to dairy cows fed grass-red clover silage: II. Amino acid profile of microbial fractions

2002 ◽  
Vol 80 (8) ◽  
pp. 2188 ◽  
Author(s):  
M. Korhonen ◽  
S. Ahvenjärvi ◽  
A. Vanhatalo ◽  
P. Huhtanen
Keyword(s):  
Amino Acid ◽  
Dairy Cows ◽  
Red Clover ◽  
Rapeseed Meal ◽  
Amino Acid Profile

Supplementing barley or rapeseed meal to dairy cows fed grass-red clover silage: II. Amino acid profile of microbial fractions1

2002 ◽  
Vol 80 (8) ◽  
pp. 2188-2196 ◽  
Author(s):  
M. Korhonen ◽  
S. Ahvenjärvi ◽  
A. Vanhatalo ◽  
P. Huhtanen
Keyword(s):  
Amino Acid ◽  
Dairy Cows ◽  
Red Clover ◽  
Rapeseed Meal ◽  
Amino Acid Profile

scholarly journals Digestion of feed amino acids in the rumen and small intestine of dairy cows measured with nylon-bag techniques

1997 ◽  
Vol 77 (1) ◽  
pp. 83-97 ◽  
Author(s):  
W. M. van Straalen ◽  
J. J. Odinga ◽  
W. Mostert
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Dairy Cows ◽  
Palm Kernel ◽  
Amino Acid Profile ◽  
Considerable Effect ◽  
Maize Silage ◽  
Total N ◽  
Grass Silage ◽  
Silage Maize

The disappearance of total N, non-protein-N and amino acid-N after washing, rumen incubation and intestinal passage of sugarbeet pulp, maize-gluten feed, maize feed meal, palm kernel meal, soyabean hulls, soyabean meal, grass silage, maize silage and concentrate was measured in four dairy cows using nylon-bag techniques. Disappearance of amino acid-N after washing varied between feedstuff's from 14 to 69% of feed amino acid-N, and was lower than disappearance of non-protein-N. For sugarbeet pulp, grass silage and maize silage, washing had a considerable effect on the amino acid profile. Disappearance of amino acid-N after rumen incubation was also lower than non-protein-N and varied between feedstuffs from 25 to 73% of feed amino acid-N. Rumen incubation had only a small effect on the amino acid profile of the residue after washing. Disappearance of amino acid-N in the intestine varied between feedstuffs from 70 to 99% of rumen undegraded amino acid-N, and was higher than the disappearance of non-protein-N. Intestinal incubation showed a considerable effect on the amino acid profile for all feedstuffs. It was concluded that protein that was assumed to escape rumen degradation and was absorbable in the intestine was higher in amino acids and methionine, and lower in non-amino acid-N and glutamic acid and proline compared with protein in the feedstuff.

Chemical composition, in situ degradable coefficients, and ruminal and post-ruminal dry matter and crude protein disappearances of rapeseed meal

2007 ◽  
Vol 2007 ◽  
pp. 163-163
Author(s):  
Mozhgan Mazhari ◽  
Mohsen Danesh Mesgaran
Keyword(s):  
Amino Acid ◽  
Chemical Composition ◽  
Dairy Cows ◽  
Crude Protein ◽  
Dry Matter ◽  
Rapeseed Meal ◽  
Amino Acid Balance

Several experiments have been conducted on the value of rapeseed meal (RSM) for dairy cows (Laarveld et al., 1976). The crude protein (CP) content of RSM is almost high (360-420 g kg-1 of DM) with a good amino acid balance. The in situ degradability of RSM was extensively studied (Kendall et al., 1991). The aim of the present study was to determine the chemical composition, in situ degradable coefficients, and ruminal and post-ruminal dry matter (DM) and CP disappearances of an Iranian variety of rapeseed meal (SLM sp.).

Effect of dietary methionine supplementation on hoof horn growth in primiparous cows

1998 ◽  
Vol 1998 ◽  
pp. 200-200
Author(s):  
J. A. Metcalf ◽  
C. Marsh ◽  
A. M. Johnston ◽  
S. A. May ◽  
C. T. Livesey
Keyword(s):  
Amino Acid ◽  
Milk Production ◽  
Block Design ◽  
Rapeseed Meal ◽  
Amino Acid Profile ◽  
Major Protein ◽  
Horn Growth ◽  
Increase Milk Production ◽  
Soya Bean Meal ◽  
Sulphur Amino Acids

Horn growth rate does not appear to be related to the amino acid profile of the major protein source for dairy cattle (Offer, Logue & Roberts, 1997), but it is possible that sulphur amino acids are limiting in early lactation, when the homeorhetic drive to milk production is most extreme. Supplementation of a high production ration for dairy cows with protected methionine should increase milk production, and allow any sulphur amino acid limitation on horn growth to be alleviated (Mengal, Galbraith, Souri & Scaife, 1997).A total of 60 in-calf Holstein heifers were divided into two groups in a randomised block design. The study commenced approximately three weeks pre-calving until 26 weeks post calving, and animals were housed in one of three systems for the duration. Two diets were formulated based on a grass silage:maize silage mixture (50:50 DM basis), with rolled wheat, soya bean meal, sugar beet feed and rapeseed meal and were offered from approximately five days post calving for the remainder of the 26 week period.

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