JONES D F, HOOVER W H, MILLER W T K. Effects of concentrations of peptides on microbial metabolism in continuous culture[J]. Journal of Animal Science, 1998, 76:611-616.
[2]
ALBERT L C, EDWARD P M. Modified reagents for determination of urea and ammonia[J]. Clinical Chemistry, 1962, 8(2):130-132.
ZINN R A, OWENS F N. A rapid procedure for purine measurement and its use for estimating net ruminal protein synthesis[J]. Canadian Journal of Animal Science, 1986, 66:157-166.
[5]
ZHOU J Z, BRUNS M A, JAMES M. DNA Recovery from soils of diverse composition[J]. Applied and environmental microbiology, 1996(2):316-322.
[6]
NEWEY H, SMYTH D H. Intracellular hydrolysis of dipeptides during intestinal absorption[J]. Journal of Physiology, 1960, 152:367-374.
PUCHALA R, PIERZYNOWSKI S G, WULIJI T, et al. Effects of small peptides or amino acids infused to a perfused area of the skin of Angora goats on mohair growth[J]. Journal of Animal Science, 2002, 80:1097-1104.
CRUZ S R, SAMIRAH M A, NEWBOLD C J, et al. Influence of peptides, amino acids and urea on microbial activity in the rumen of sheep receiving grass hay and on the growth of rumen bacteria in vitro[J]. Animal Feed Science and Technology, 1994, 49:151-161.
KHAFIPOUR E, LI S C, PLAIZIER J C, et al. Rumen microbiome composition determined using two nutritional models of subacute ruminal acidosis[J]. Applied and Environmental Microbiology, 2009, 75(22):7115-7124.
[17]
DENMAN S E, MCSWEENEY C S. Development of a real-time PCR assay for monitoring anaerobic fungal and cellulolytic bacterial populations within the rumen[J]. Federation of European Microbiological Societies Microbiology Ecology, 2006, 58:572-582.
PETERS J P, SHEN R Y, ROBINSON J A, et al. Disappearance and passage of propionic acid from the rumen of the beef steer[J]. Journal of Animal Science, 1990, 68:3373-3349.
[21]
BOWMAN J G, ASPLUND J M. Nitrogen utilization, ruminal fermentation and abomasal nitrogen flow in sheep fed Caucasian Bluestem hay supplemented with lucerne or urea[J]. Animal Feed Science and Technology, 1988, 20(1):33-44.
ALLEN S A, MILLER E L. Determination of N 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[J]. British Journal of Nutrition, 1976, 36:353.
[24]
IPHARRAGUERRE R, CLARK J H, FREEMAN D E. Varying protein and starch in the diet of dairy cows. I. Effects on ruminal fermentation and intestinal supply of nutrients[J]. Journal of Dairy Science, 2005, 88:2537-2555.
[25]
FU C J, FELTON E E, LEHMKUHLER J W, et al. Ruminal peptide concentration required to optimize microbial growth and efficiency[J]. Journal of Animal Science, 2001, 79:1305-1312.
GRISWOLD K E, MILLER T K, HOOVER W H, et al. Effect of form of nitrogen on growth of ruminal microbes in continuous culture[J]. Journal of Animal Science, 1996, 74:483-491.
RUSSELL J B, O''CONNOR J D, FOX D G, et al. Net carbohydrate and protein system for evaluating cattle diets: I. Ruminal fermentation[J]. Journal of Animal Science, 1992, 70(11):3551-3561.