الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The present study was carried out at farm and laboratory of Animal
Production Department- Faculty of Agriculture, Fayoum University but,
cellulase production trials and microbiological analyses were carried out at the
laboratories of Dairy Department, National Research Center , Dokki, Giza, Egypt.
Cellulase enzyme was produced from some fungi and evaluated its potential
activity compared to commercial cellulolytic enzyme source. The in vitro dry
matter (IVDMD) and organic matter disappearance (IVOMD) were determined for
ration consisted of 50% concentrate feed mixture, 25% Egyptian clover and 25 %
wheat straw supplemented separately with locally produced cellulase
(Asperozym) and commercial cellulolytic enzymes (Phytabex plus) compared to
the control. Also the in vivo experiment was conducted where nine of lactating
baladi goats after 20 days of parturition were divided into three groups, three
animals per each group. The first group was fed 50% concentrate feed mixture ,
10% Egyptian clover and 40% wheat straw (Control ration). The second group
was fed control ration supplemented with Asperozym at level of 1000 unit of
cellulolytic enzymes /kg DM intake ( R1 ). The third group was fed control ration
supplemented with Phytabex plus at level 1000 unit of cellulolytic enzymes /kg
DM intake. ( R2 ). The results revealed that increasing the Asperozym and
Phytabex plus supplementation levels up to 1000 unit of cellulolytic enzymes/kg
DM exhibited the highest (P<0.05) values of IVDMD and IVOMD. Asperozym
was superior to Phytabex plus for improving feed digestion and milk production
by goats. Digestible crude protein and TDN of R1 and R2 rations were
insignificantly higher than control ration. There were significant (P<0.05)
increases in fat corrected milk yield ( 4 % fat) and fat percentage of ( R1) and (
R2 ) compared to control ration .Insignificant differences for dry matter and
energy intake (SV,TDN and DCP) between the tested rations. Feed conversion of
DM, SV and TDN was decreased significant (P<0.05) control ration compared to
R1 and R2 rations. Results of some blood serum analysis showed that no side
effect of using the tested cellulolytic enzymes on lactating goats. from economical
point of view, the best ration was R1