0.857
IF5
0.900
IF
Q3
JCR
0.92
CiteScore
0.405
SJR
Q2
SJR
20
MNiSW
165.24
ICV
SHORT COMMUNICATION
 
CC-BY 4.0
 
 

Difference of nitrogen contents determined by the combustion and Kjeldahl method in response to nitrate nitrogen in some feedstuffs

W. S. Guo 1,  
L. P. Ren 1,  
Z. M. Zhou 1,  
Q. X. Meng 1  
 
1
State Key Laboratory of Animal Nutrition, College of Animal Science & Technology, China Agricultural University, Beijing 100094, P.R. China
J. Anim. Feed Sci. 2007;16(Suppl. 2):178–183
Publish date: 2007-09-17
KEYWORDS
ABSTRACT
T Two experiments were conducted to examine the difference of nitrogen contents determined by the combustion (Cm) and Kjeldahl (Km) method and its response to nitrate nitrogen in ruminant feedstuffs. In Experiment 1, 14 ruminant feedstuffs were determined for combustion nitrogen (Cn), Kjeldahl nitrogen (Kn) and nitrate nitrogen (NO3-N). Although NO3-N resulted in a difference between the Cm and Km, the correlation coefficient of the NO3-N content and the value of “Cn-Kn” was low (R2= 0.6341), suggesting other factors influencing the difference of N determination between the Cm and Km. In Experiment 2, recoveries of net NO3-N were determined using Chinese wild rye-grass (CWG), maize grain (MG) and soyabean meal (SBM) supplemented with sodium nitrate at the level of 5, 10, 15, 20, 25, 30, 35, 40 and 45% on DM basis, respectively. The results showed that different recoveries of NO3-N by Km rather than Cm would account for the difference of Cn and Kn in some ruminant feedstuffs.
CORRESPONDING AUTHOR
Q. X. Meng   
State Key Laboratory of Animal Nutrition, College of Animal Science & Technology, China Agricultural University, Beijing 100094, P.R.. China
 
CITATIONS (1):
1. Feeding nitrate and docosahexaenoic acid affects enteric methane production and milk fatty acid composition in lactating dairy cows
G. Klop, B. Hatew, A. Bannink, J. Dijkstra
Journal of Dairy Science
ISSN:1230-1388