Wilson D B. Three microbial strategies for plant cell wall degradation[J]. Annals of the New York Academy of Science, 2008, 11(25): 289-297.
[3]
Feng Y L. Ruminant nutrition[M]. Beijing: Science Press, 2004.
[4]
Allison M J. Biosynthesis of amino acids by ruminal microorganisms[J]. Journal of Animal Science, 1969, 29(5): 797-807.
[5]
Felix A. Effect of feeding isoacids with urea on growth and nutrient utilization by lactating cows[J]. Journal of Dairy Science, 1980, 63(11): 1943-1955.
[6]
Wang X F, Mao S Y, Zhu W Y. Effects of gypenoside on in vitro ruminal microbial methane production and fermentation characteristics[J]. Acta Prataculturae Sinica, 2011, 20(2): 52-59.
[7]
Cui Z H, Hao L Z, Liu S J, et al. Evaluation of the fermentation characteristics of mixed oat green hay and native pastures in the Qinghai plateau using an in vitro gas production technique[J]. Acta Prataculturae Sinica, 2012, 21(3): 250-257.
[8]
Liu Q, Huang Y X, Wang C, et al. Effects of isobutyrate on rumen fermentation and purine derivatives of urine in simmental steer[J]. Chinese Journal of Animal Nutrition, 2006, 18(3): 160-165.
[9]
Krysl L J, Galyean M L, Judkins M B, et al. Digestive physiology of steers grazing fertilized and non-fertilized blue grama rangeland[J]. Journal of Range Manage, 1987, 40(6): 493-501.
[10]
McCollum F T, Galyean M L, Krysl L J, et al. Cattle grazing blue grama rangeland I. Seasonal diets and rumen fermentation[J]. Journal of Range Manage, 1985, 38(6): 539-543.
[11]
Gunter S A, Krysl L J, Judkins M B, et al. Influence of branched chain fatty acid supplementation on voluntary intake, site and extent of digestion, ruminal fermentation, digesta kinetics and microbial protein synthesis in beef heifers consuming grass hay[J]. Journal of Animal Science, 1990, 68(9): 2885-2892.
[12]
Ma Y J, Wang B J, Li F D, et al. Effects of different nutrition levels in total mixed rations on production performance,apparent digestibility, and slaughter performance in yard feeding lambs[J]. Acta Prataculturae Sinica, 2012, 21(4): 252-258.
[13]
Felix A, Cook R M, Huber J T. Isoacids and urea as a protein supplement for lactating cows fed corn silage[J]. Journal of Dairy Science, 1980, 63(7): 1098-1103.
[14]
Feio A G. Metabolic and digestion effects of the addition of ammonium salts of volatile fatty acids to the diets of cows in early lactation[J]. Journal of Dairy Science, 1984, 67(Suppl.1): 117-129.
[15]
Wang R J, Xue B, Yan T H, et al. Effects of isoacids supplementation in different forage to concentrate ratio diets on rumen fermentation in vitro[J]. Chinese Journal Of Animal Nutrition[J]. 2012, 24(6): 1181-1188.
[16]
Wang Q, Ao C J, Ga E D, et al. The effect of isoacids on production performance of dairy cows[J]. Heilongjiang Journal of Animal Science and Veterinary Medicine, 2010, (3): 73-75.
[17]
Moharrery A. Incorporation of isoacids, oil, NPN and protein in the ration of sheep and their effects on protease and amylase in the rumen fluid[J]. Emirates Journal of Agricultural Sciences, 2003, 15(1): 76-83.
[18]
Shao G, Miao S J, Shen B L. Effect of suitable combination of mixture isoacids on rumen fermentation in cow[J]. China Animal Husbandry & Veterinary Medicine, 2009, 36(5): 21-24.
[19]
Quispe M E, Barradas H, Cook R M. Effects of isoacids, urea and sulfur on ruminal fermentation in sheep fed pineapple tops[J]. Small Ruminant Research, 1991, 6(1/2): 49-54.
[20]
Zhang L Y. Feed Analysis and Feed Quality Detection Technology[M]. Beijing: China Agricultural University Press, 2007.
[21]
Guo C. The development of gas production unit used in livestock energy metabolism test[J]. Journal of People's Liberation Army Veterinary University, 1982, 2(2): 192-198.
[22]
Hume I D,Moir R J,Somers M.Synthesis of microbial protein in the rumen.Ⅱ.A response to higher volatile fatty acids[J]. Australian Journal of Agricultural Research, 1970, 21(2): 297-304.
[23]
Stern M D. Influence of branched-chain volatile fatty acids on fiber digestion in continuous culture of rumen contents[J]. Journal of Animal Science, 1985, 59(Suppl.1): 449.
[24]
Felix A, Cook R M, Huber J T. Effect of feeding isoacids with urea on growth and nutrient utilization by lactating cows[J]. Journal of Dairy Science, 1980, 63(11): 1943-1946.
[25]
Wang D, Li F D, Zhang Y D, et al. Mixed silage of potato pulp and corn straw affects growth performance, ruminant environments and blood biochemical parameters of mutton sheep[J]. Acta Prataculturae Sinica, 2012, 21(5): 47-54.
[26]
Chalupa W, Bloch B. Responses of rumen bacteria sustained in semi continuous culture to amino nitrogen and to branche chain fatty acids[J]. Journal of Dairy Science, 1983, 66(Suppl.1): 152.
[27]
Soofi R G C, Fahey L, Berger L, et al. Effects of branched chain volatile fatty acids, trypticase, urea, and starch on in vitro dry matter disappearance of soybean stover[J]. Journal of Dairy Science, 1982, 65(9): 1748.
[28]
Misra A K, Thakur K S. Influence of isobutyric acid supplementation on nutrient intake, its utilization, blood metabolites and growth performance of crossbred calves fed wheat straw based low protein diets[J]. Asian-Australia Journal of Animal Science, 2001, 14(2): 200-205.
[29]
Seal C J, Parker D S. Effect of intraruminal propionic acid infusion on metabolism of mesenteric-and portal drained viscera in growing steers fed a forage diet: I. Volatile fatty acids, glucose and lactate[J]. Journal of Animal Science, 1994, 72(5): 1325-1334.
[30]
Deetz L E, Richardson C R, Pritchard R H, et al. Feedlot performance and carcass characteristics of steers fed diets containing ammonium salts of the branched-chain fatty acids and valeric acid[J]. Journal of Animal Science, 1985, 61(6): 1539-1549.
[31]
Wang D S, Huang J L, Zhang Z H, et al. Effects of plant solid powder and ethanol extract of Impatiens balsamina on microbial metabolic parameters during in vitro rumen fermentation[J]. Acta Prataculturae Sinica, 2013, 22(2): 87-93.
[32]
Judd M, Kelliher F, Ulyatt, et al. Net methane emissions from grazing sheep[J]. Global Change Biology, 1999, 5(6): 647-657.
[33]
Fan X, Dong H M, Han L J, et al.Experimental study on the factors affecting methane emission of beef cattle[J]. Transactions of the Chinese Society of Agricultural Engineering, 2006, 22(8): 179-183.
[34]
参考文献:
[35]
Wilson D B. Three microbial strategies for plant cell wall degradation[J]. Annals of the New York Academy of Science, 2008, 11(25): 289-297.
[36]
冯仰廉. 反刍动物营养学[M]. 北京:科学出版社, 2004.
[37]
Allison M J. Biosynthesis of amino acids by ruminal microorganisms[J]. Journal of Animal Science, 1969, 29(5): 797-807.
[38]
Felix A. Effect of feeding isoacids with urea on growth and nutrient utilization by lactating cows[J]. Journal of Dairy Science, 1980, 63(11): 1943-1955.
Krysl L J, Galyean M L, Judkins M B,et al. Digestive physiology of steers grazing fertilized and non-fertilized blue grama rangeland[J]. Journal of Range Manage, 1987, 40(6): 493-501.
[43]
McCollum F T, Galyean M L, Krysl L J,et al. Cattle grazing blue grama rangeland I. Seasonal diets and rumen fermentation[J]. Journal of Range Manage, 1985, 38(6): 539-543.
[44]
Gunter S A, Krysl L J, Judkins M B,et al. Influence of branched-chain fatty acid supplementation on voluntary intake, site and extent of digestion, ruminal fermentation, digesta kinetics and microbial protein synthesis in beef heifers consuming grass hay[J]. Journal of Animal Science, 1990, 68(9): 2885-2892.
Felix A, Cook R M, Huber J T. Isoacids and urea as a protein supplement for lactating cows fed corn silage[J]. Journal of Dairy Science, 1980, 63(7): 1098-1103.
[47]
Feio A G. Metabolic and digestion effects of the addition of ammonium salts of volatile fatty acids to the diets of cows in early lactation[J]. Journal of Dairy Science, 1984, 67(Suppl.1): 117-129.
Moharrery A. Incorporation of isoacids, oil, NPN and protein in the ration of sheep and their effects on protease and amylase in the rumen fluid[J]. Emirates Journal of Agricultural Sciences, 2003, 15(1): 76-83.
Quispe M E, Barradas H, Cook R M. Effects of isoacids, urea and sulfur on ruminal fermentation in sheep fed pineapple tops[J]. Small Ruminant Research, 1991, 6(1/2): 49-54.
Hume I D, Moir R J, Somers M. Synthesis of microbial protein in the rumen.Ⅱ.A response to higher volatile fatty acids[J]. Australian Journal of Agricultural Research, 1970, 21(2): 297-304.
[56]
Stern M D. Influence of branched-chain volatile fatty acids on fiber digestion in continuous culture of rumen contents[J]. Journal of Animal Science, 1985, 59(Suppl.1): 449.
[57]
Felix A, Cook R M, Huber J T. Effect of feeding isoacids with urea on growth and nutrient utilization by lactating cows[J]. Journal of Dairy Science, 1980, 63(11): 1943-1946.
Chalupa W, Bloch B. Responses of rumen bacteria sustained in semi-continuous culture to amino nitrogen and to branche-chain fatty acids[J]. Journal of Dairy Science, 1983, 66(Suppl.1): 152.
[60]
Soofi R G C, Fahey L, Berger L,et al. Effects of branched chain volatile fatty acids, trypticase, urea, and starch on in vitro dry matter disappearance of soybean stover[J]. Journal of Dairy Science, 1982, 65(9): 1748.
[61]
Misra A K, Thakur K S. Influence of isobutyric acid supplementation on nutrient intake, its utilization, blood metabolites and growth performance of crossbred calves fed wheat straw based low protein diets[J]. Asian-Australia Journal of Animal Science, 2001, 14(2): 200-205.
[62]
Seal C J, Parker D S. Effect of intraruminal propionic acid infusion on metabolism of mesenteric-and portal-drained viscera in growing steers fed a forage diet: I. Volatile fatty acids, glucose and lactate[J]. Journal of Animal Science, 1994, 72(5): 1325-1334.
[63]
Deetz L E, Richardson C R, Pritchard R H,et al. Feedlot performance and carcass characteristics of steers fed diets containing ammonium salts of the branched-chain fatty acids and valeric acid[J]. Journal of Animal Science, 1985, 61(6): 1539-1549.