TY  - JOUR
T1  - Effects of Different Levels of Fish Oil and Canola Oil on <I>in vitro</I> and <I>in vivo</I> Nutrient Digestibility
AU - Vafa, T.S. AU - Naserian, A.A. AU - Heravi Moussavi, A.R. AU - Valizadeh, R. AU - Danesh Mesgaran, M. 
JO  - Research Journal of Biological Sciences
VL  - 4
IS  - 12
SP  - 1221
EP  - 1226
PY  - 2009
DA  - 2001/08/19
SN  - 1815-8846
DO  - rjbsci.2009.1221.1226
UR  - https://makhillpublications.co/view-article.php?doi=rjbsci.2009.1221.1226
KW  - Fish oil
KW  -canola oil
KW  -in vitro
KW  -in vivo
KW  -nutrient digestibility
KW  -milk yield
AB  - Two experiments were designated to examine the effects of different levels of fish oil and canola oil on <I>in vitro</I> and <I>in vivo</I> nutrient digestibility. Experiment 1 was performed to assess the effects of unsaturated oils (fish oil, canola oil, their combination) in three levels (2, 4 and 6% on DM basis) on <I>In vitro</I> Dry Matter (IVDMD) and Organic Matter (IVOMD) digestibility of alfalfa hay and corn silage. For both forages, oil supplementation decreased IVDMD and IVOMD significantly (p&lt;0.01) and increasing oil levels significantly (p&lt;0.05) decreased IVDMD and IVOMD of both forages but alfalfa hay was more susceptible to increasing oil levels than corn silage. In experiment 2, eight multiparous early lactation Holstein cows (42&plusmn;12 DIM, 40&plusmn;6 kg daily milk yield) were fed a total mixed ration supplemented with either 0% oil (Control), 2% Fish Oil (FO), 1% Canola Oil + 1% Fish Oil (COFO) or 2% canola oil according to a double 4x4 Latin square design to examine the effects of unsaturated oil on milk yield, DMI and nutrient digestibility. Each period lasted 3 weeks experimental analyses were restricted to the last week of each period. Diets consist of 20% alfalfa, 20% corn silage and 60% concentrate. Cows were housed in tie stalls and fed the TMR two times a day to allow 5-10% orts (as-fed basis). Experimental diets had no significant (p&gt;0.05) effect on milk production but DMI decreased significantly (p&lt;0.05) in FO diet. Digestibility of OM and NDF were significantly (p&lt;0.05) decreased in FO diet in comparison with three other diets, ADF digestibility was decreased significantly (p&lt;0.05) in all oil containing diet in comparison with control but fat digestibility was not affected by treatments (p&gt;0.05). Results of the current experiments shows that combination of fish oil and canola oil in 2% of dry matter had less negative effects on nutrient digestibility of forages and total mixture rations.
ER  -