ملخص البحث :
The digestion trial started in the fifth week and fermentations trial in the tenth week (day 70)of the growth experiment,
samples of rumen fluid were withdrawn from 12 Awassi lambs(3 animal\ treatment), treatments were Alfalfa hay stalks
or treated with 4% urea or with the addition of 9% molasses or both together(T1,T2,T3 and T4) respectively, and the
concentrated feed(17.89 of crude protein and 12.87 Mj of metabolic energy) was provided at a rate of 2.5% of the live
body weight, the lambs are the same as those used in the digestion experiment, a rubber tube (Stomach tube) was used
and inserted into the animal’s cavity, and a machine was placed at the other end of the tube A pipette for the purpose of
withdrawing an appropriate amount of liquid. Samples of rumen fluid were drawn during three different times: time
(zero),before the morning feeding, and the first withdrawal is considered and after that, concentrated and roughage feed
are provided (chopped Alfalfa hay stalks), then the second and third withdrawals were made after 3 hours and 6 hours of
morning feeding, and all samples from rumen fluid and feces (digestion trial) were kept by freezing until analyzes were
performed to estimate the digestion coefficient of different food compounds, and the current study concluded: There
were no significant differences for the effect of the treatment with urea or the addition of molasses or without them to
the Alfalfa hay stalks in the pH characteristic and for all times of withdrawal of rumen fluid 0, 3and 6 hours of feeding,
while the concentration of ammonia nitrogen, there were highly significant differences (P<0.01) at time 0 from feeding
and in favor of the lambs of the fourth group, which amounted to 62.331 mg / 100 ml compared to the other three
treatments, then followed by the second group (urea treatment), which was 51.331 mg / 100 ml, which also
outperformed the third and first treatments, as they recorded the lowest values, reaching 28.997 and 25.997 mg/100 ml,
respectively, while there were no significant differences in the concentration of ammonia nitrogen at the time of 3 hours
of feeding for all lambs of the groups, and it was noted that there were significant differences (P < 0.05) as it reached the
highest in the first and third groups, then followed by the second group, while the lowest values (significant decrease)
were recorded in the fourth group, and the results showed a significant superiority (P<0.05) between the averages of the
four treatments for the effect of treatment with urea or adding of molasses to diets for fattening Awassi lambs in total
volatile fatty acid concentrations, and he digestion coefficient of all food compounds recorded a significant superiority
(P<0.01) for the treatment T4 except for ash, then followed by T2 and T3, while the lowest values were in the control
treatment T1
-
سنة النشر : 22
-
تصنيف البحث : scopus
- تحميل
