SHORT COMMUNICATION
Difference of nitrogen contents determined by the combustion and Kjeldahl method in response to nitrate nitrogen in some feedstuffs
,
 
,
 
,
 
 
 
 
More details
Hide details
1
State Key Laboratory of Animal Nutrition, College of Animal Science & Technology, China Agricultural University, Beijing 100094, P.R. China
 
 
Publication date: 2007-09-17
 
 
Corresponding author
Q. X. Meng   

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
 
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.
 
CITATIONS (5):
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
 
2.
An Overview of the Kjeldahl Method of Nitrogen Determination. Part II. Sample Preparation, Working Scale, Instrumental Finish, and Quality Control
Purificación Sáez-Plaza, María Navas, Sławomir Wybraniec, Tadeusz Michałowski, Agustín Asuero
Critical Reviews in Analytical Chemistry
 
3.
An Overview of the Kjeldahl Method of Nitrogen Determination. Part I. Early History, Chemistry of the Procedure, and Titrimetric Finish
Purificación Sáez-Plaza, Tadeusz Michałowski, María Navas, Agustín Asuero, Sławomir Wybraniec
Critical Reviews in Analytical Chemistry
 
4.
Cladosporium sp. Isolate as Fungal Plant Growth Promoting Agent
Iuliana Răut, Mariana Călin, Luiza Capră, Ana-Maria Gurban, Mihaela Doni, Nicoleta Radu, Luiza Jecu
Agronomy
 
5.
Variations of the Kjeldahl method for assessing nitrogen concentration in tropical forages
Daiana Quirino, Nicole Lima, Malber Palma, Oliveira de, Edenio Detmann
Grass and Forage Science
 
ISSN:1230-1388
Journals System - logo
Scroll to top