EFFECT OF POLYETHYLENE GLYCOL-6000 ON CHEMICAL COMPOSITION AND DEGRADABILITY OF WHITE GRAPE POMACE IN BUFFALOES

ABSTRACT An experiment was carried out to study the effect of Polyethylene Glycol 6000 (PEG-6000) inclusion on chemical composition and degradability of dry matter (DM) and crude Protein (CP) of white grape pomace (WGP) in buffaloes. WGP contains some antinutritional factors such as tannins that may cause to decrease its feeding values. Some tanninification agents like Polyethylene glycol (PEG) can enhance the feeding value of tanniniferous feeds. PEG inclusion was done at 4 levels. The nylon bag technique was used to determine the rate of degradability of DM and CP with 3 rumen-fistulated Azeri buffalos. Results showed that DM content of white grape pomace (WGP) decreased with PEG addition. PEG addition was cause to decrease total tannins and total phenols of WGP. According to observations a fraction (rapidly degraded fraction) of DM content of WGP increased between treatments significantly (P<0.05). Also effective degradability (ED) of CP content of WGP decreased significantly (P<0.05). Different tannins in various plant samples may vary not only in total content but also in their ability to affect degradation, and to bind to proteins or fiber. Totally degradability results showed that PEG addition increased DM degradability values and enhanced soluble proteins of WGP

Effects of different levels of sunflower residue silage replacement with alfalfa hay on Azari male buffalo calves fattening performance

An experiment was conducted to study the effects of replacing alfalfa hay with different levels of sunflower residual silage (SRS) on fattening performance of Azari male buffalo calves. Thirty calves with 138.33 Kg of BW fed experimental diets in a completely randomized design with 5 groups and 6 replicates. The five groups (1, 2, 3, 4 and 5) included 0 (control), 25, 50, 75 and 100 percent replacement of alfalfa hay with SRS, respectively in basal diet. The results showed that dry matter intake (DMI) was significantly different between the groups (p<0.05). The highest and the lowest DMI were shown at the groups 1 and 5, respectively, however there was no significant difference between the groups 2, 3, and 4 with control. Daily weight gain (DWG) was significantly different between the groups (p<0.05). Group 5 had significantly lower DWG than groups 1, 2 and 3, furthermore there were no significant difference between groups 1, 2, 3 and 4. Feed conversion ratio (FCR) was significantly different among the groups (p<0.05). There was no significant difference among the groups 1, 2, 3 and 4. But these groups had significantly better FCR than the group 5. The best FCR was obtained for group3. It may conclude that alfalfa hay can be substituted with SRS at 50 % level with no negative effects on Azari male buffalo calves fattening performance

Effect of different fibrous and nonfiber carbohydrate levels on nutrients digestibility of total mixed ration using in vivo in buffalo

In order to investigate the effect of different levels of NDF on chewing behavior and their relationship with ruminal acidity, 3 ruminally fistulated buffalo steers (average BW = 389.6 &plusmn;7.5 Kg) were allotted in a change over design in Agriculture and Natural Resource center of Uremia city of Iran. Two diets with 2 levels of NDF were used as treatments. First and second diets had 52 and 47 % of NDF, respectively. The experiment had two periods and each period&rsquo;s take 15d for adaptation, 7d for sample collection and determination of nutrient digestibility and for determination of passage rate, 2d for measuring ruminal pH, and 3d for measuring chewing activity. Using Penn Stat Particle Separator (PSPS), distribution, geometric mean, its standard deviation and physically effective factor (pef) of diets were determined. Animals fed ad libitum at 09:00a.m and 21:00p.m. The time that spent for eating and rumination were optically recorded in 24h with 5 minutes intervals and total chewing activity calculated from sum of eating and rumination time. There were no significant differences between chemical composition, particles distribution, geometric mean, its standard deviation and physically effective factor (pef) of diets, dry matter intake (kg/d) and nutrients intake (NDF, ADF, NFC and crude protein) and their digestibility, but digestibility ADF, NDF and NFC decreased as content of fiber increased(P1.18 increased (P1.18 increased (P<0.05)