2002
DOI: 10.1016/s0377-8401(01)00348-0
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Quantitation of the flow of soluble non-ammonia nitrogen entering the omasal canal of dairy cows fed grass silage based diets

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Cited by 58 publications
(127 citation statements)
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“…The fraction A for our results of grain meals, rapeseed feeds, pasture forages and silages achieved mean values of 144.9, 206.8, 296.3 and 468.2 g/kg CP, respectively. These findings are in agreement with several authors (Choi et al, 2002;Chrenková et al, 2014;Polat et al, 2014). The same author noted that data on the nitrogen fractions determined according to the CNCPS system of lupine grains were lacking.…”
Section: Resultssupporting
confidence: 92%
“…The fraction A for our results of grain meals, rapeseed feeds, pasture forages and silages achieved mean values of 144.9, 206.8, 296.3 and 468.2 g/kg CP, respectively. These findings are in agreement with several authors (Choi et al, 2002;Chrenková et al, 2014;Polat et al, 2014). The same author noted that data on the nitrogen fractions determined according to the CNCPS system of lupine grains were lacking.…”
Section: Resultssupporting
confidence: 92%
“…The proportion of NAN dietary flow (% of ingested N) that escaped rumen degradation was small (on average 10.6%) and ranged from 5.8 to 10.1% for perennial ryegrass and 10.9 to 15% for cocksfoot. As in the results of Peltekova and Broderick [32], Choi et al [11], some soluble N escaped rumen degradation and flowed to the duodenum in the liquid phase of the digesta. However, in this study, dietary NAN flow may have been overestimated.…”
Section: The Various Nitrogen Fractions In Rumen Fluidmentioning
confidence: 70%
“…However, in this study, dietary NAN flow may have been overestimated. This fraction may contain other N forms such as nucleic acids [33] that are found in low quantities [39] and other nitrogen forms (saliva N, endogenous N, microbial nitrogen) as observed by Choi et al [11]. On the contrary to the results for in situ degradation of N (DegN) obtained on the same samples, and to previously reported results [8,16,24,25], the effects of maturity stage or conservation method were not observed, but the NAN flow was relative to ingested N in this study.…”
Section: The Various Nitrogen Fractions In Rumen Fluidmentioning
confidence: 99%
“…(3) The presence of the enzyme polyphenol oxidase, decreased proteolysis and non protein nitrogen content (NPN). Forage NPN consists of oligopeptides, free amino acids, ammonium compounds and other small molecules that rapidly contribute to the ruminal ammonia pool [12].…”
Section: Discussionmentioning
confidence: 99%