The effects of sequence of feed allocation within the day on microbial protein production and diet digestibility in lambs fed barley or sugar beet based diets

2000 ◽  
Vol 2000 ◽  
pp. 96-96
Author(s):  
J. M. Richardson ◽  
L. A. Sinclair ◽  
R. G. Wilkinson
Keyword(s):  
Sugar Beet ◽  
Protein Production ◽  
Microbial Protein ◽  
Protein Supply

Feeding lambs diets formulated to be synchronous in terms of hourly energy and protein supply to the rumen has been reported to improve the efficiency of energy utilisation (Richardsonet al.1999). In a previous study Sinclairet al.(1995) reported that the efficiency of microbial protein production was improved when animals were fed a synchronous diet. The objectives of the present study were to investigate whether the changes in metabolism reported by Richardsonet al.(1999) may be related to rumen microbial protein production and diet digestibility.

The effect of supplementing ammonia-treated straw with sugar beet pulp or barley on rumen kinetics and microbial protein production

1992 ◽  
Vol 1992 ◽  
pp. 216-217
Author(s):  
S. A. Abdulrazak ◽  
X. B. Chen ◽  
E. R. Ørskov
Keyword(s):  
Sugar Beet ◽  
Protein Production ◽  
Control Diet ◽  
Latin Square ◽  
Sugar Beet Pulp ◽  
Microbial Protein ◽  
Fresh Weight Basis ◽  
Digestible Organic Matter ◽  
Outflow Rate ◽  
Beet Pulp

Data reported in the literature indicate that the efficiency of microbial protein production to ruminants vary considerably, i.e. 14-49 g microbial N/kg digestible organic matter apparently fermented in the rumen (ARC, 1984). This variation could be due to the effects of several factors, e.g. different types of feeds, rumen digesta outflow rate. The present experiment was conducted to examine whether there were differences between types of carbohydrate feedstuffs, e.g. ammonia-treated straw, barley and sugar beet pulp, as energy sources for the synthesis of microbial protein in sheep.Four Blackface x Suffolk wethers (body weight 39-42 kg) fitted with a rumen cannula were used. The animals were housed in metabolic cages and were offered 800 g/day of ammonia-treated straw (control) with or without supplementation with sugar beet pulp or barley at 20%, and 40% on fresh weight basis (SBP20, SBP40, B20 and B40 respectively). A 4 x 5 latin square design was used. The control diet also contained 20 g urea, 20 g casein, 3.4 g Na2SO4 and 10 g mineral & vitamin mixture per kg DM. Its N and ash contents were 25.6 and 74.1 g/kg DM respectively.

The effect of supplementing straw with barley or unmolassed sugar-beet pulp on microbial protein supply in sheep estimated from urinary purine derivative excretion

1992 ◽  
Vol 55 (3) ◽  
pp. 413-417 ◽  
Author(s):  
X. B. Chen ◽  
S. A. Abdulrazak ◽  
W. J. Shand ◽  
E. R. Ørskov
Keyword(s):  
Sugar Beet ◽  
Block Design ◽  
Live Weight ◽  
Sugar Beet Pulp ◽  
Barley Straw ◽  
Microbial Protein ◽  
Purine Derivative ◽  
Total Diet ◽  
Beet Pulp ◽  
Protein Supply

AbstractFour sheep (live weight 39 to 42 kg) fitted with rumen cannulas were offered ammonia-treated barley straw alone (control) or supplemented with unmolassed sugar-beet pulp or rolled barley at 0·20 or 0·40 of the total diet on a fresh weight basis (SBP20, SBP40, B20 and B40, respectively) using a 4 × 5 randomized block design. Total diet intakes were 710, 873, 1054, 843 and 1021 g dry matter per day for control, SBP20, SBP40, B20 and B40 respectively. The intake of straw was depressed significantly with SBP40 and B40 (P < 0·05). Rumen pH and ammonia concentration decreased, and total volatile fatty acid concentrations increased (P < 0·05) with increasing level of supplementation for both supplements. Rumen liquid outflow rate was affected little by the supplementation although this measurement for B40 was significantly higher than that for the other treatments. Microbial protein supply, estimated from urinary excretion of purine derivatives, increased significantly with the increasing amounts of supplements (4·5, 6·7, 8·5, 7·1 and 9·0 (s.e.d. 0·73) g N per day for control, SBP20, SBP40, B20 and B40 respectively) (P < 0·05). The calculated efficiency of microbial protein production was 12·8, 14·2, 14·3, 15·7 and 14·5 (s.e.d. 1·45) g N per kg digestible organic matter intake (DOMI) for the five treatments. Although this value was lowest with the control, differences between treatments were not significant (P > 0·05). It seems that microbial protein yield per unit DOMI for a diet based on ammonia-treated straw could not be improved substantially by supplementation with sugar-beet pulp or barley.

Technical note: Evaluation of urinary purine derivatives in comparison with duodenal purines for estimating rumen microbial protein supply in sheep1

2017 ◽  
Vol 95 (2) ◽  
pp. 884-891 ◽  
Author(s):  
G. V. Kozloski ◽  
C. M. Stefanello ◽  
L. Oliveira ◽  
H. M. N. Ribeiro Filho ◽  
T. J. Klopfenstein
Keyword(s):  
Technical Note ◽  
Microbial Protein ◽  
Purine Derivatives ◽  
Protein Supply

scholarly journals Forage cactus associated with different fiber sources for lactating Sindhi cows: intake, digestibility and microbial protein production

2014 ◽  
Vol 43 (10) ◽  
pp. 530-536
Author(s):  
Carla Aparecida Soares Saraiva ◽  
Severino Gonzaga Neto ◽  
Maria Fernanda Soares Queiroz ◽  
Lara Toledo Henriques ◽  
Edilson Paes Saraiva ◽  
...  
Keyword(s):  
Protein Production ◽  
Microbial Protein

Purine derivatives in spot urine samples and plasma of sheep: a possible index of microbial protein supply

1993 ◽  
Vol 1993 ◽  
pp. 5-5 ◽  
Author(s):  
X. B. Chen ◽  
Adriana T. Mejia ◽  
D. J. Kyle ◽  
E. R. Ørskov
Keyword(s):  
Urinary Excretion ◽  
Feed Intake ◽  
Urine Samples ◽  
Plasma Samples ◽  
Microbial Protein ◽  
Purine Derivatives ◽  
Feeding Regime ◽  
Spot Urine ◽  
Alternative Index ◽  
Protein Supply

In ruminants, daily urinary excretion of purine derivatives (PD) reflects the absorption of microbial purines and can be used as an index of microbial protein supply (Chen, Ørskov and Hovell, 1991). The application could be extended to farm conditions if measurements based on spot urine samples or plasma could serve as an alternative index. The objective of this study was to examine whether PD concentrations in spot urine or plasma samples vary diurnally during a given feeding regime and if they reflect differences in daily PD excretion induced by varying feed intake.

Rumen microbial protein supply to sheep given diets containing either urea or casein as the main N source

1992 ◽  
Vol 1992 ◽  
pp. 215-215
Author(s):  
X. B. Chen ◽  
C. X. Gu ◽  
W. X. Zhang ◽  
E. R. Ørskov
Keyword(s):  
Live Weight ◽  
Basal Diet ◽  
Microbial Protein ◽  
Host Animal ◽  
Rumen Microbes ◽  
Feed Formulation ◽  
N Source ◽  
Ruminant Diets ◽  
Protein Supply ◽  
N Requirement

The ability of rumen microbes to synthesize protein from ammonia-N enables the use of non-protein-N as a N source in ruminant diets. The strategy for feed formulation therefore would be to meet the microbial N requirement with a cheap N source (such as urea) and to increase the proportion of dietary protein for use directly by the host animal. There has been some indication that the efficiency of rumen microbial protein synthesis could be higher if protein N is provided (Stock, Klopfenstein, Brink, Britton and Harmon, 1986). The objective of this experiment was to compare the use of urea and casein as a source of rumen degradable nitrogen (RDN) for the production of microbial protein in sheep.Five male Blackface x Suffolk lambs (33-42 kg live weight) fitted with rumen cannula were used. The animals were fed a restricted amount (721 g DM/day) of a low-N basal diet with or without supplementation with either urea or casein.

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