THEODOROU M K,WILLIAMS B A,DHANOAM S,et al.A simple gas production method using a pressure transducer to determine the fermentation kinetics of ruminant feeds[J].Animal Feed Science and Technology,1994,48(3/4):185-197.
VAN SOEST P J,ROBERTSON J B,LEWIS B A.Methods for dietary fiber,neutral detergent fiber,and nonstarch polysaccharides in relation to animal nutrition[J].Journal of Dairy Science,1991,74(10):3583-3597.
CLARK J H,KLUSMEYER T H,CAMERON M R.Microbial protein synthesis and flows of nitrogen fractions to the duodenum of dairy cows[J].Journal of Dairy Science,1992,75(8):2304-2323.
MENKE K,STEINGASS H.Estimation of the energetic feed value obtained from chemical analysis and in vitro gas production using rumen fluid[J].Animal Research and Development,1988,28(7):55-59.
[23]
CONE J W,VAN GELDER A H,DRIEHUIS F.Description of gas production profiles with a three-phasic model[J].Animal Feed Science and Technology,1997,66(1/2/3/4):31-45.
[24]
OWENS F N,BERGEN W G.Nitrogen metabolism of ruminant animals:historical perspective,current understanding and future implications[J].Journal of Animal Science,1983,57(Suppl.2):498-518.