scholarly journals Effects of the Pattern of Energy Supply on the Efficiency of Nitrogen Utilization for Microbial Protein Synthesis in the Non-Lactating Cows Consuming Grass Silage

2000 ◽  
Vol 13 (7) ◽  
pp. 962-966 ◽  
Author(s):  
K. H. Kim ◽  
S. S. Lee ◽  
B. T. Jeon ◽  
C. W. Kang
Keyword(s):  
Protein Synthesis ◽  
Energy Supply ◽  
Nitrogen Utilization ◽  
Microbial Protein ◽  
Microbial Protein Synthesis ◽  
Grass Silage ◽  
Lactating Cows

The effect of carbohydrate supplementation of grass silage on rumen microbial protein synthesis using rumen simulation continuous culture

1996 ◽  
Vol 1996 ◽  
pp. 214-214
Author(s):  
J.W. Joo ◽  
W.J. Maeng ◽  
J.E. Cockburn ◽  
A.B. McAllan ◽  
H. Park ◽  
...  
Keyword(s):  
Protein Synthesis ◽  
Continuous Culture ◽  
Microbial Activity ◽  
Microbial Protein ◽  
Additional Energy ◽  
Carbohydrate Supplementation ◽  
Rumen Microbes ◽  
Microbial Protein Synthesis ◽  
Grass Silage

Grass silage is considered to be asynchronous in the supply of energy and nitrogen to the rumen microbes. It is thought that this contributes towards the reduced quantities and efficiencies of rumen microbial protein synthesis frequently observed in animals feed on such diets (Beever, 1993). Additional energy from carbohydrates may help to ameliorate this situation. A rumen simulated continuous culture (RSCC) system was used to study the influence of supplementation of grass silage with various carbohydrate sources on rumen microbial activity.

Rumen fermentation and microbial protein synthesis in cattle given intraruminal infusions of lactic acid with a grass silage based diet

1992 ◽  
Vol 119 (3) ◽  
pp. 411-418 ◽  
Author(s):  
S. Jaakkola ◽  
P. Huhtanen
Keyword(s):  
Protein Synthesis ◽  
Lactic Acid ◽  
Volatile Fatty Acids ◽  
Control Diet ◽  
Basal Diet ◽  
Rumen Fermentation ◽  
Microbial Protein ◽  
Acid Fermentation ◽  
Microbial Protein Synthesis ◽  
Grass Silage

SUMMARYFour Friesian bulls with ruminal and duodenal cannulae were used in a 4 × 4 Latin square experiment to study the effects of lactic acid (LA) on rumen fermentation and microbial protein synthesis. On a dry matter (DM) basis (g/kg), the basal diet comprised grass silage (700), barley (240) and rapeseed meal (60) and it was given at the rate of 7·1 kg DM/day. LA was infused continuously into the rumen at the rates of 0 (L0), 40 (L40), 80 (L80) or 120 (L120) g/kg basal diet DM.The molar proportion of propionate in the rumen volatile fatty acids (VFA) increased linearly (P < 0.001) and that of acetate, isovalerate, caproate (P < 0.01) and isobutyrate (P < 005) decreased linearly with an increasing rate of LA infusion. At the same time there was a linear decrease (P < 0.05) in the number of rumen protozoa. When the metabolic fate of infused LA was calculated on a molar basis, 0.21 of lactic acid was converted to acetate, 0·52 to propionate and 0.27 to butyrate.Infusion of LA into the rumen had no effect on the site or extent of the digestion of basal diet organic matter (OM) and neutral detergent fibre (NDF). LA diets tended to have a lower microbial N flow at the duodenum (71·4 v. 85·8 g N/day) and lower synthetic efficiency in the rumen (14·4 v. 20.4 g N/kg OM apparently fermented) when compared with the control diet. The ratio of duodenal non-ammonia N to N intake was highest with the control diet and lowest with L40, the effect of the LA rate being quadratic (P < 0·05). The results suggest that propionate was the main end-product of lactic acid fermentation in the rumen with the grass silage based diet. Lactic acid had no value as an energy source for microbial protein synthesis.

scholarly journals IMBANGAN HIJAUAN DAN KONSENTRAT DALAM RANSUM TERHADAP RESPON FERMENTASI RUMEN DAN SINTESIS PROTEIN MIKROBA PEDET SAPI BALI CALON INDUK

2018 ◽  
Vol 21 (2) ◽  
pp. 60
Author(s):  
BUDIASA I K. M. ◽  
N. N. SURYANI ◽  
I W. SUARNA
Keyword(s):  
Protein Synthesis ◽  
Energy Supply ◽  
Block Design ◽  
Microbial Protein ◽  
Host Animal ◽  
Microbial Protein Synthesis ◽  
Randomized Block Design ◽  
Average Body ◽  
Average Body Weight

In order to fulfill the domestic meat requirements and reduce imports so government continually develop localbeef cattle based on their quantity and quality of meat. Among the local cattle in Indonesia, Bali cattle is the mostfavourite cattle (32.31%) considering on its meat quality. There were 12 calves used in this research with 100 kgof average body weight. The treatments were diet with 40% concentrate and 60% king grass (A); 45% concentrateand 55% king grass (B); 50% concentrate and 50% king grass (C); 55% concentrate and 45% king grass (D). Theexperiment was design in a completely randomized block design with four treatments and three replicates. Thevariables measured were rumen fermentation as of pH, NH3, total and pastial of VFA (acetic acid, propionic acidand butyric acid), microbial protein synthesis and protozoa populations. It showed that treatment D produce thehighest NH3 and total VFA, 14.66 mMol, and 165.38 mMol respectively compared to other treatments. Propionicacid was 27.87 mMol the highest in treatment D and 368.62 g/h/d microbial protein synthesis. It can be concludedthe higher proportion of concentrate in the bali heifer calves so the more energy supply, in this case, SPM availabilityfor the host animal is higher.

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