International Journal of Dairy Science1811-97431811-9751Asian Network for Scientific Information10.3923/ijds.2012.95.102KhattabMostafa Sayed El-NorS.A.H. Abo El-SayedH.M.A. El-BordenyN.E. AbdouM.M. MatloupO.H. 4201274The increase in bio-ethanol industry has created a need for alternative to
corn for ruminants. In the other side there is increase in availability of glycerol,
a primary co-product material of biodiesel production. The objective of this
study was to investigate the effect of partial replacing of corn with glycerol
in diets fed to lactating goats. Twelve lactating Nubian goats were fed a base
diet (T1), diets containing 9% glycerol (on DM basis) (T2)
and diet containing 9% glycerol plus commercial enzymes 4 g kg-1
DM (on DM basis) (T3) for 84 days. The experimental diets T2
and T3 decreased butyric acids concentration and acetate:propionate
ratio in rumen liquor in relation to T1, the concentration of propionic
acid was increased in T2 and T3 compared with T1.
Replacing corn by glycerol (T2) decreased apparent nutrients digestion
coefficients Dry Matter (DM), Organic Matter (OM), Crud Protein (CP), Neutral
Detergent Fiber (NDF) and Acid Detergent Fiber (ADF) comparing with other treatments
(T1 and T3). Milk production was 1581, 1174 and 1610±77.6
g h-1 day-1 and FCM was 1774, 1030 and 1648±115.9
g h-1 day-1 for T1, T2 and T3,
respectively, Milk composition was not altered by glycerol feeding plus fibrinolytic
enzymes (T3) except that milk total protein was decreased from 4.6
24 to 3.5%. While, replacing corn by glycerol (T2) decreased values
of milk composition compared with control diets (T1). The results
indicated that glycerol is a suitable replacement for corn grain with adding
fibrinolytic enzymes in diets for lactating goats and that it may be included
in rations to a level of at least 9% of dry matter without adverse effects on
milk yield or milk composition.]]>Abo El-Nor, S., A.A. AbuGhazaleh, R.B. Potu, D. Hastings and M.S.A. Khattab,201016299105AOAC.,199015th Edn.,Pages: 1230Pages: 1230Bush, K.J., R.W. Russell and J.W. Young,1979213671374Castillejos, L., S. Calsamiglia and A. Ferret,2006in vitro systems.]]>8926492658Cori, C.F. and W.M. Shine,193582134135DeFrain, J.M., A.R. Hippen, K.F. Kalscheur and P.W. Jardon,20048741954206Donkin, S.S., S.L. Koser, H.M. White, P.H. Doane and M.J. Cecava,20099251115119Farkasova, Z., P. Reichel, C. Tothova, V. Hisira and G. Kovac,200864770772Garton, G., A. Lough and E. Vioque,196125215225Goff, J.P. and R.L. Horst,200184153154Heinimo, J. and M. Junginger,20093313101320Johns, A.,195335262269Krebs, H.A. and P. Lund,196698210214Lammers, P.J., B.J. Kerr, M.S. Honeyman, K. Stalder and W.A. Dozier et al.,200887104107Leng, R.A.,19701970pp: 241-242pp: 241-242Mach, N., A. Bach and M. Devant,200987632638NRC.,1981Pages: 91Pages: 91Paggi, R.A., J.P. Fay and C. Faverin,2004In vitro ruminal digestibility of oat hay and cellulolytic activity in the presence of increasing concentrations of short-chain acids and glycerol.]]>1428996Paggi, R.A., J.P. Fay and H.M. Fernandez,199978341347Ribeiro, C.V.D.M., S.K.R. Karnati and M.L. Eastridge,20058840074017Roger, V., G. Fonty, C. Andre and P. Gouet,199225197201Schroder, A. and K.H. Sudekum,19991999Snedecor, G.W. and W.G. Cochran,19827th Edn.,van Soest, P.J., J.B. Robertson and B.A. Lewis,19917435833597Walter, A., F. Rosillo-Calle, P. Dolzan, E. Piacente and K. Borges da Cunha,200832730748