الفهرس 
1. IntroductionOnly 14 pages are availabe for public view
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Abstract
The effect of biological treatments on chemical composition, fiber fraction and in vitro digestibility was evaluated. In vivo digestibility,
nutritive value and N- balance were also evaluated. The effect of
biological treatments on rumen fermentation and some blood parameters
were also determined. Two experiments were carried out; the first was in
vitro preliminary study in which the best combination of the tested
microbes along with the best condition of cultured microbes was tested.
The second was an in vivo digestibility and nitrogen balance study in
which six experimental rations were investigated using 4 sheep in each.
The main results of these experiments were:
1- The best combination of the used microbes was the quadruple
(GDYB) which gave the best results in comparison with the
single, double and triple combinations.
2- The DM, OM and CF contents decreased with the biological
treatments.
3- The biological treatments increased CP, EE, NFE and ash; they
also increased as the combined number of microbes increased.
4- Biological treatments decreased cell wall constituents especially
cellulose.
5- Increasing media levels improved the DM and OM contents and
their in vitro digestibility.
6- Decreasing the media substrate from 5 to 2g improved the
chemical composition and IVDMD and IVOMD.
SUMMARY AND CONCLUSION
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7- Increasing the incubation time from 1 to 4 weeks caused an
increase in chemical composition and in vitro digestibility.
8- The treated rations (T3 and T6) increased apparent digestibility
of the experimental rations (P<0.01) for all nutrients than the
untreated ones.
9- The biological treatment increased digestibility of DM and OM
by about 10 units.
10- Digestion coefficients of CP were 46.47, 48.21, 60.11, 40.71,
45.33 and 55.56% for T1, T2, T3, T4, T5 and T6, respectively.
11- The biological treatment improved digestibility of all fiber
fractions by about 10 units especially with the 40% roughage
ration; it improved from 51.23 to 59.4% for NDF; from 40.11 to
50.35% for ADF; from 49.29 to 58.51% for CEL; from 58.7 to
65.14% for HEM.
12- The lower roughage rations (T1, T2 and T3) had better
digestibility of all nutrients than the higher roughage ones (T4,
T5 and T6).
13- The biological treatment improved the TDN by about 9% and
8% for T3 and T6, respectively. Values of DE followed the same
pattern.
14- The biological treatment also increased DCP by more than
44% (from 4.99 to 7.21%) in the low roughages ration and more
than 83% (from 3.61 to 6.62%) in the high roughage ration.
15- Nutritive values increased as the roughage level in the diet
decreased.