|
|
| |
| Articles
by
P. Shawrang |
Total Records (
2 ) for
P. Shawrang |
|
 |
| |
|
| |
H.R. Shahbazi
,
A.A. Sadeghi
,
H. Fazaeli
,
G. Raisali
,
M. Chamani
and
P. Shawrang
|
| |
The effect of electron beam irradiation at doses of
100, 200 and 300 kGy on ruminal dry matter degradation kinetics of wheat
straw was investigated. Samples were irradiated by electron beam irradiator
under identical conditions of temperature and humidity. Nylon bags of
untreated or irradiated wheat straw were suspended in the rumen of three
Taleshi steers for up to 96 h and resulting data were fitted to non-linear
degradation model to calculate degradation parameters of dry matter. Results
show that the washout fractions of dry matter increased linearly (p<0.001),
but potentially degradable fraction and degradation rate decreased linearly
(p<0.001) by electron beam irradiation. As a consequence, the effective
degradability of dry matter increased linearly (p<0.001) with increasing
irradiation dose. Electron beam irradiation at doses of 100, 200 and 300
kGy increased the effective degradability of dry matter at rumen outflow
rate of 0.05/h by about 7, 15 and 18%, respectively. In the condition
of this study, electron beam irradiation at dose of 200 kGy appeared to
be a suitable dose for improving dry matter degradability of wheat straw
in the rumen. |
|
| |
|
| |
H.R. Shahbazi
,
A.A. Sadeghi
,
P. Shawrang
and
G. Raisali
|
| |
The effects of gamma irradiation on ruminal dry matter, Neutral
Detergent Fiber (NDF) degradation of alfalfa hay were investigated. Alfalfa
hay samples were irradiated by gamma irradiator at doses of 50, 100 and
150 kGy under identical conditions of temperature and humidity. Nylon
bags of untreated or irradiated samples were suspended in the rumen of
three Taleshi bulls for up to 96 h and resulting data were fitted to non-linear
degradation model to calculate degradation parameters. Results indicated
that the washout fractions of dry matter and NDF increased linearly (p<0.001)
with increasing irradiation dose. The b fraction and the degradation rate
of the b fraction (c) of DM and NDF were the highest at 50 kGy dose. Effective
degradability of DM and NDF increased linearly with increasing irradiation
dose. Gamma irradiation at doses of 50, 100 and 150 kGy increased the
effective NDF degradability of alfalfa hay at rumen outflow rate of 0.05
h-1 by about 8, 11 and 12%, respectively. Gamma irradiation
affects on the hydrogenic bonds and with theirs breakdowning causes the
wander-valls power weaken, that results in the degradation of cellulose
and increasing of DM and NDF degradability. |
|
|
|
|
| |
|
