3Abe.M.K, Yamazaki and K.Kasahara.Absence of limiting amino acids in calves fed acorn and soybean meal diet past three months of age. J .Anim.Sci, 1999,77(3):769-779.
4Boever, J. L.,N. Iantcheva and B. G. Cotyyn. Microbial protein synthesis in growingfinishing bulls estimated from the urinary excretion of purine derivatives[J]. Anim. Feed Sci. Technol. 1998,75(2): 93-109.
5Chen, X. B. Estimation of microbial protein supply to sheep and cattle based on urinary excretion of purine derivatives: An over view of the technical details. International Feed Resources Unit.1992.
6Chowdhury, S. A.Effect of graded levels of wheat bran supplementation on intake, nutrient digestibility, microbial N yield and growth of native bulls fed rice straw alone[J]. Asian-AusJ. Anita. Sei. 1998,11(2): 162-170.
7Fujihara, T, Tsutomu, Shem, MN, et al.Urinary excretion of purine derivatives and plasma allantoin level in sheep and goats during fasting[J].Anim.Sci.J. 2007,78 (2): 129-134.
9Lindberg-JE.Nitrogen and purine metabolism in preruminant and ruminant goat kids liven increasing amounts of ribonucleic acids. Amim[J]. Feed Sci. Technol. 1991,35: 3-4, 213-226.
10McAllan, A.B.The fate of nucleic acids in ruminants. Proc. Nutr. Soc.1982,41:309-317.
二级参考文献21
1Antoniewicz A M,Heinemann W W,Hanks E M.1981.Effect of level of feed intake and body mass on allantoin excretion and the allantoin to creatinine ratio in the urine of sheep[J].Rocz.Nauk.Zoot.,8:49-65.
2Balcells J A,Guada C,Castrillo,Gass J.1983.Rumen digestion and urinary excretion of purine derivatives in response to urea supplementation of sodium-treated straw fed to sheep[J].British Journal of Nutrition,69:721-731.
3Chen X B,Hovell F D DeB,Orskov E R.1990a.Excretion of purine by ruminants:recycling of allantoin into the rumen via saliva and its fate in the gut[J].British Journal of Nutrition,63:197-205.
4Chen X B,Hovell F D DeB,Orskov E R.1990b.Excretion of purine derivatives by ruminants:effect of exogenous nucleic acid supply on purine derivative excretion by sheep[J].British Journal of Nutrition,63:131-142.
5Chen X B,Chen Y K,Flranklin,Orskov E R.1992.The effect of feed intake and body weight on purine derivatives excretion and microbial protein supply in sheep [J].J Anita.Sci.,70:1534-1542.
6Chen X B,Calder A G,Prasitkusol P,Kyle D J,Jayasuriya MCN.1998.Determination of tSN isotopic enrichment and concentratoins of allantoin and uric acid in urine by gas chromatography/mass spectrometry[J].Journal of Mass Spectrornetry,3 3:130-137.
7Fujihara T,Orskov E R,Reeds P J,Kyle D J.1987.The effect of protein infusion on urinary excretion of purine derivatives in ruminants nourished by intragastric nutrition[J].J Agric Sci.,(Camb.).109:7-12.
8Kahn L P, Nolan J V.2000.Kinetics of allantoin metabolism in sheep[J].British Journal of Nutrition,84:629--634.
9Lindberg J E,Jacobsson K G.1990.Nitrogen and purine metabolism at varying energy and protein supplies in sheep sustained on intragastrie infusion[J].British Journal of Nutrition,64:359-370.
10Lindberg J E,Bristav H,Manyenga A R.1989.Excretion of purines in the urine of sheep in relation to duodenal flow of microbial protein[J].Swed.J Agric.Res.,19:45-52.
5PEREZ J F.BALCELLS J A.CEBRIAN.Excretion of endogenous and exogenous purine derivatives in sheep:effect of increased concentrte intake[J].Br J Nutr,1998,79(3):237-240.
6GONDA H L,WEBSTER A.Effect of diet level of intake sodium bicarbonate and monensin in urinary allantoin excretion in sheep[J].Nutr,1992,67:345-353.
