The effect of fermentable nitrogen availability on in vitro gas production and degradability of NDF

@article{Nagadi2000TheEO,
  title={The effect of fermentable nitrogen availability on in vitro gas production and degradability of NDF},
  author={Sameer Attiyah Nagadi and Mario Herrero and Neil S. Jessop},
  journal={Animal Feed Science and Technology},
  year={2000},
  volume={87},
  pages={241-251}
}
Abstract Effects of harvesting ruminal micro-organisms from ruminal fluid on patterns of gas production were investigated in experiment 1 by incubating 200 mg DM of pure cellulose, oatfeed, ryegrass, cocksfoot, wet and dry season kikuyu grasses with either diluted ruminal fluid or harvested ruminal bacteria. Gas production degradability parameters obtained from fitting the data to the model Gas=B(1−exp−C(t−Lag)) after correcting gas volumes for the fermentation of soluble material did not… Expand

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References

SHOWING 1-10 OF 35 REFERENCES
The effect of nitrogen source and concentration on in vitro gas production using rumen micro-organisms
TLDR
The response of the in vitro gas production system to N supplementation was broadly consistent with earlier in vitro work, indicating that a minimum of about 80 mg l −1 N was required to achieve the maximum degradation of carbohydrate by rumen microbes. Expand
Effect of ammonia concentration of rumen microbial protein production in vitro.
TLDR
The results suggest that addition of non-protein N supplements to ruminant rations are warranted only if the prevailing concentration of ruminal ammonia is less than 50 mg NH3-N/l ruminal fluid. Expand
Effect of ammonia concentration on the composition, hydrolytic activity and nitrogen metabolism of the microbial flora of the rumen.
  • R. Wallace
  • Biology, Medicine
  • The Journal of applied bacteriology
  • 1979
TLDR
Hydrolytic rumen bacteria may require the higher NH3 concentration either for effective NH3 assimilation by an unknown mechanism involving alanine or for full expression of enzyme activity. Expand
The effect of supplementation with molasses / urea blocks on ruminal digestion.
Three penned sheep were established on a diet of oaten chaff (1.4% N, 51% DM digestibility) and the.n, in successive periods, given free access to molasses/ urea blocks containing 10, 15 or 20% urea.Expand
Effect of rumen ammonia concentration on in situ rate and extent of digestion of feedstuffs.
TLDR
It is concluded that rumen ammonia concentrations required for maximum digestion are not constant but rather are a function of fermentability of the diet. Expand
The effect of energy and nitrogen supply pattern on rumen bacterial growth in vitro
The effect of energy and nitrogen (N) supply pattern on rumen bacterial growth was investigated in vitro. In experiment 1, glucose was was fed to batch cultures of mixed rumen bacteria according toExpand
Why don't ruminal bacteria digest cellulose faster?
  • P. Weimer
  • Biology, Medicine
  • Journal of dairy science
  • 1996
TLDR
In light of numerous proposals to improve microbial cellulose digestion in ruminants, it is instructive to examine the characteristics of these species that contribute to their superior cellulolytic capabilities and to identify the factors that prevent them from digesting cellulose even more rapidly. Expand
Synthesis of microbial protein in the rumen. I. Influence of the level of nitrogen intake
TLDR
It was calculated that protein production in the rumen at the highest nitrogen intake was less than the potential production from the energy supplied to the microorganisms. Expand
The degradability characteristics of fifty-four roughages and roughage neutral-detergent fibres as described by in vitro gas production and their relationship to voluntary feed intake.
TLDR
There was no statistical advantage in the use of the exponential model describing extent and rate of fermentation over some of the simple gas volume measurements: 75% of the variation in DMI was accounted for by in vitro gas production of whole roughage after 8 h of incubation. Expand
Determination of nitrogen requirement for microbial growth from the effect of urea supplementation of a low N diet on abomasal N flow and N recycling in wethers and lambs.
TLDR
Maximum net microbial production can be obtained when the diet supplies an amount of fermentable N equal to the microbial N output as digestible OM content increases from 400 to 800 g/kg DM. Expand
...
1
2
3
4
...