Article Details : |
| | Article Name : | | Effect of adding linseed oil on in vitro gas and
methane production and some fermentation
characteristics | Author Name : | | A. H. KUTTAR, MAJID HAMID RASHID, ASHWAQ ABD ALI | Publisher : | | Bridge Center | Article URL : | | | Abstract : | | This experiment was carried out in animal feeding laboratories in the Animal
Production Department of the Faculty of Agriculture, University of Baghdad / Jadriya
for the period from 1/12/2016 to 1/5/2017, where food supplements were used with
different percentages of Linseed oil. 0,70,140,280 ?l / kg dry matter to a mixture of
concentrated feed and coarse feed to study its effect on total gas production and methane
gas and fermentation properties ((pH, volatile fatty acid ratios (Acetic, propionic and
butyric), ammonia nitrogen ratio)). Results:
1-. Using the gas production technology in the laboratory, a significant
reduction in the total production of gas and methane in T2, T3, containing 70,140 ?l /
kg dry material from LO oil at incubation time after 12 hours in vitro compared to
T1and T4 (supplemented with 280 ?l / kg dry matter of LO oil). After 24 hours of in
vitro incubation, T2 treatment was significantly reduced (p?0.01) in total gas production
compared to T3 and T4, For the production of methane, it was significantly lower
(p?0.01) for T2 compared to T3 and T4 respectively. The total volume of gas after 48
hours of in vitro incubation was significantly decreased (p?0.01) for T2, T3 and T4
compared to the control treatment , the same T6 and T7 were significantly lower
(p?0.01) in methane compared to T2 and after 72 hours of laboratory incubation, T2 and
T4 showed a significant decrease (p?0.01) in total gas production while T6 was central
between them and there were no differences In the size of methane in the models
withdrawn after 72 hours of in vitro incubation.
2- For fermentation characteristics, the results showed the following: 2-1 There were significant differences (P?0.01) in the pH values of the
withdrawn samples after 12 hours of in vitro incubation compared to the control
treatment, the T4 was significantly reduced (P?0.01) in the pH values in the withdrawn
models after 24 and after 48 and 72 hours of laboratory incubation. The T4 was
significantly lower (P?0.01) in the pH value compared to T2 and T3 respectively.
2-2 As for the concentration of ammonia nitrogen, The results showed that
there were significant differences (P?0.01) between the LO oil added to the hay in the
concentration of ammonia nitrogen where T2, T3 and T4 containing LO were
significantly reduced (P?0.01) in nitrogen concentration Ammonia compared to T1
treatment of the withdrawn samples after 12 and 24 hours of laboratory incubation. The
results also showed a significant decrease in (p<0.01) in the ammonia nitrogen
concentration of T3 and T4 for the withdrawn samples after 48 and 72 hours of
laboratory incubation compared to T2 treatment.
2-3 The results showed that there were significant differences (p<0.01) between
the LO oil of the hay in the concentration of volatile fatty acids (acetic acid, butyric acid,
propionic), where T2 and T3 were significantly lower (p<0.01) 12 days of incubation in
vitro compared to T4 treatment, while no significant differences in acid concentration
were observed 24 hours of laboratory incubation. T2 was significantly lower (p<0.01) in
acetic acid concentration compared to T3 and T4 respectively, There were significant
differences(p<0.01) in acid concentration In the samples withdrawn after 72 hours of in
vitro incubation. As for propionic acid, LO (T5) showed a significant reduction(p<0.01)
in the concentration of propionic acid after 12 in vitro incubation compared with T1
while T3 and T4 were significant(p<0.01) The concentration of propionic acid after 24
and 48 hours of in vitro incubation, while the concentration of acid and high morale
(p<0.01) in the treatment T2 compared with the treatment T4, and the results showed no
significant differences of LO oil treatments in the concentration of butyric acid has 12
and 24 hours incubation in the laboratory, Results showed a high morale (p<0.01)
concentration Butyric acid for treatment T2 compared to control treatment after 48 and
72 hours of incubation laboratory. | Keywords : | | linseed oil, in vitro gas and methane production,
fermentation characteristics |
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