[4] FANG Jing-yun,CHEN An-ping,PENG Chang-hui,et al.Science,2001,292:2320.

[5] Khalil M A K,Shearer M J.Chemosphere,1993,26:1.

[9] Mills J A N,Kebreab E,Yates C M,et al.J.Anim. Sci.,2003,81:31.

[10] Mcclinton L.National Hog Farmer,2004,49:14.

[13] Holter J B,Young A J.Journal of Dairy Science,1992,75(8):2165.

[15] Miller T T,Wolin M J,Zhao H,et al.Appl.Environ.Microbiol.,1986,51:201.

[16] Ferry G G.Crit.Rev.Biochem.,1992,27:473.

[17] Dimarco A A,Bobik T A,Wolfe R S.Ann.Rev.Biochem.,1990,59:355.

[18] Vogels G D,Hoppe W F,Stumm C K.Appl.Environ.Microbiol.,1980,40:608.

[19] Whitelaw F G,Eadie J M,Bruce L A,et al.Br.J.Nutr.,1984,52:261.

[20] Krumholz L R,Forsberg C W,Veira D M.Can.J.Microbiol.,1983,29:676.

[26] Harper L A,Denmead O T,Freney J R,et al.Journal of Animal Science,1999,77(6):1392.

[27] Benchaar C,R ivest J,Pomar C,et al.Journal of Animal Science,1998,76(2):617.

[29] McLean J A,Tobin G.Animal and Human Calorimetry.New York:Cambridge University Press,1987.

[30] Kelly J M,Kerrigan B,Milligan L P,et al.Can.J.Anim.Sci.,1994,74:65.

[31] Leuning R,Baker S K,Jamie I M,et al.Atmospheric Environment,1999,33:1357.

[32] Islam M,Abe H,Hayashi Y,et al.Small Ruminant Research,2000,38:165.

[33] Lassey K R,Walker C F.Chemosphere-Global Change Science,2001,3:367.

[44] Dubaniewicz T H,Chilton J E,Dobroski H Jr.IEEE Transcation on Industry Application,1993,29(4):740.