[2] [2] Norris K H,Barnes R F,Moore J E,et al.J.Anim.Sci.,1976,43:889.

[5] [5] Lyons R K,Stuth J W.J.Range Manage.,1992,45:238.

[6] [6] Leite E R,Stuth J W.Small Rumin.Res.,1995,15: 223.

[7] [7] Park R S,Gordon F J,Agnew R E,et al.Anim.Feed Sci.Technol.,1997,68:235.

[8] [8] Coleman S W,Murray I.Anim.Feed Sci.Technol.,1993,44:237.

[9] [9] Adesogan A T,Owen E,Givens D I.Anim.Sci.,1999, 69:427.

[10] [10] De la Roza B,Martinez A,Modrono S,et al.In:Davies A M C,Giangiacomo R.(Eds.),Near Infrared Spectroscopy:Proc.9th Intl.Conf.NIR Publications,Chichester,UK,2000.661.

[11] [11] Tilley J M A,Terry R A.J.Br.Grassl.Soc.,1963,18:104.

[12] [12] Givens D I,Baker C W,Moss A R,et al.Anim.Feed Sci.Technol.,1991,35:83.

[13] [13] De Boever J L,Vanacker J M,de Brabander D L.Anim.Feed Sci.Technol., 2002,101:73.

[14] [14] Griggs T C,Lobos K B,Kingery P E.Crop Sci.,1999,39:1164.

[15] [15] Demarquilly C,Andrieu J,Michalet-Doreau B,et al.Measurement of the Nutritive Value of Feeds.In:Jarrige,R.(Ed.),Ruminant Nutrition,Recommended Allowance and Feed Tables.INRA and John Libbey,Paris,1989.193.

[16] [16] Coates D B.In:Eldridge D,Freudenberger D.(Eds.),People and Rangelands:Building the Future.Proc.6th Intl.Rangeland Congress,Townsville (Queensland,Australia),vol.1.International Rangeland Congress.Aitkenvale, Australia,1999.466.

[17] [17] Todorov N,Atanassova S,Pavlov D,et al.Livest.Prod.Sci.,1994,39:89.

[18] [18] Atanassova S,Todorov N,Djouvinov D.et al.In:Davies A M C, Williams P (Eds.),Near Infrared Spectroscopy:The Future Waves.NIR Publications.Chichester,UK,1996.548.

[19] [19] Hoffman P C,Brehm N M,Bauman L M.et al.J.Dairy Sci.,1999,82:764.

[20] [20] Lebzien P,Paul C.Anim.Feed Sci.Technol.,1997,68:225.

[21] [21] Flinn P C,Windham W R,Dove H.Pasture Intake by Grazing Sheep Estimated Using Natural and Dosed n-Alkanes:a Place for NIRS In:Isakson T,Naes T(Eds.),Proceedings of the 5th International Conference on NIRS, Naughessund (Norway).Ellis Horwood,London,1992.

[22] [22] Decruyenaere V,Peters M,Stillmant D,et al.In:Mannetje L.’t,Ramirez-Aviles L,Sandoval-Castro C,et al.(Eds.),Proc.6th Intl.Symp. Nutr.Herb.,Merida (Mexico),Universidad Autonoma de Yucatan (Mexico),2003.

[23] [23] Boval M,Lecomte Ph,Archimede H.In:Mannetje L.’t,Ramirez-Aviles L,Sandoval-Castro C,et al(Eds.),Proc.6th Intl.Symp.Nutr.Herb.Merida(Mexico),Universidad Autonoma de Yucatan (Mexico),2003.

[24] [24] Agnew R E,Park R S,Mayne C S.et al.Anim.Feed Sci.Technol.,2004,115:169.

[25] [25] Agriculture and Food Research Council(AFRC).Nutr.Abstr.Rev.Ser.B.,1990,60:729.

[27] [27] Paul C,Alex M,Soelter U,et al.Agricultural Research,2001,234:55.

[28] [28] Poppi D P.Aust.J.Agric.Res.,1996,47:489.

[29] [29] McNamee B F,Woods V B,Kilpatrick D J,et al.Livestock Production Science,2005,92:233.

[30] [30] Yan T,Agnew R E.Animal Feed Science and Technology,2004,117:197.

[31] [31] Berardo N.Grass Forage Sci.,1997,52:27.

[32] [32] Garcia-Cindad A,Garcia-Criado B,Perez-Corona M E.J.Sci.Food Agric.,1993,63:419.

[33] [33] Barton K E,Windham W R.J.Assoc.Off Anal.Chem.,1988,71:1162.

[34] [34] Scott E Showers,Douglas R Tolleson,Jerry W Stuth,et al.Rangeland Ecology and Management,2006,3:300.

[35] [35] Li H,Tolleson D,Stuth J,et al.Small Ruminant Research,2007,68:263.

[36] [36] Mentink R L,Hoffman P C,Bauman L M.Journal of Dairy Science,2006,6:2320.

[37] [37] Volesky J D,Coleman S W.J.Range Manage.1996,49:163.

[38] [38] Coleman S W,Barton F E,Meyer R D.Crop Science,1985,25:834.

[39] [39] Landau S,Glasser T,Dvash L.Small Ruminant Research,2006,61:1