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English :
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Impact of using feed additives with corn stover silage in lamb rations on performance, digestibility, rumen activity, some blood constitunts and carcass triats
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Arabic :
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تأثير استخدام اضافات غذائية مع سيلاج حطب الذرة في علائق الحملان على اداء النمو و معاملات الهضم و نشاط الكرش و بعض خصائص الدم و الذبيحة
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| Abstract |
Sixteen Ossimi male lamius weighed 21.69 kg on average and aged 5 months were used in a 204 days feeding trial. Animals were randomly divided into four equal groups (4 animals each) to study the effect of feeding corn stover silage with different feed additives on nutrients digestibility, performance, carcass characteristics and feed efficiency in growing lambs. The experimental lambs were randomly assigned into four experimental rations with or without feed additives. The first group was considered as control ( A ) and fed at 1 % of live body weight ( LBW) CFM ( concentrate feed mixture) plus 1% of LBW corn stover silage and rice straw ad lib without feed additive. While, the other three groups received the control ration plus 5g/h/d More - yeast (MY), 5g Ihld Oina-ferm (DF) and 5g /h/d Biodian (BO) for B, C and D groups, respectively.
Results showed that MY,DF and BO supplementation with Jambs rations did not show any Affect on nutrients digestibility of OM, OM, CP, EE and NFE . On the other hand, the CF digestibility was significantly (P<0.05) higher with MY,OF and BO supplementation compared with the control ration.
TDN values ranged between 60.33 and 61.68%.The lowest value was recorded with both rations of C and A (control); while, O and B rations had the highest value.
DCP percentage tended to decreased with rations supplemented with MY, DF and BO than that in the control ration. However, TDN and DCP values did not significantly influence by the supplementations.
Supplemented MY, DF and BO rations had lower ruminal pH at zero, 3 and 6 hrs. in all groups (except with those fed D ration at 6 hrs.) compared with the control group. Supplemented rations with MY and DF had significantly (P<0.05) lower NH3-N concentration at 3 hrs. than those fed the control ration. Also, ration D gave lower NH3-N concentration, but with no significant difference, compared with the control ration. Whereas,NH3-N concentrations at 6 hrs. post feeding were significantly (P<0.05) decreased with C and D rations compared with those fed both the control (A) and B rations. Although, ruminal TVFA's values at 3 hrs post feeding were significantly (P< 0.05) higher for ration C supplemented with DF and significantly (P< 0.05) lower for ration B than the control (A) and D rations. Moreover, ruminaI TVFA's values at 6 hrs. post feeding were significantly (P< 0.05) higher for ration D and significantly lower for ration B than the control and C rations.
Results showed no significantly differences between the tested groups and the control group in blood serum total protein ,globulin and urea concentration .While, animals fed B and C rations recorded significant (P<0.05) decrease in concentration of serum albumin (3.72 and 3.30 g/dl ,respectively) compared to the control group .(4.88 g/dl) and insignificant decrease with those fed 0 ration (4.33 g/dl).
The decreases in DM intake (kg/h/d) recorded with lambs fed C and D rations were 7. 40 and 2.61% ,respectively compared With those fed A ration (control) . TDN intake (kg/h/d) was nearly similar in all groups; while, DCP intake ( kg/h/d) was higher fo( 18nbs fed A ration (control) than those fed ration B (by 16.28 %), ration C ( by 17.44%) and ration D ( by 16.28 %) .
Averege daily gain (g/h) was the highest with lambs fed C ration (156.9) followed by those fed D ration (152 ), B ration (151) and then control ration (149.51).
The differences among groups were not significant. Feed conversion as kg DM, TDN and DCP intake to obtained one kg gain showed that rations B,C and D ,respectively had the best values than those fed the control ration.
On the other hand, dressing percentages ( on the basis of hot carcass weight without or with edible organs relative to fasting weight) showed that animals group fed A and D rations were nearly similar and higher; whereas, those fed ration B recanled the lowest values ( 44.68 and 48.91 %, respectively) .The differences were not significant.
Feed cost per kg gain was lower in A ration (control), whereas, D ration was the highest feed cost/kg gain (3.23l.E.). .
Keywords: Com stover silage, Feed additives, Feeding value, Lambs performance, Carcass traits, Economic efficiency.
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| Publication year |
2006
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| Pages |
3291-3306
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| Availability location |
معهد بحوث الانتاج الحيوانى- شارع نادى الصيد - الدقى - الجيزة
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| Availability number |
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| Organization Name |
Animal Production Research Institute (APRI)
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| Country |
Egypt
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| City |
المنصورة
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| serial title |
Journal Agricultural Science
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| Volume |
31
. 6
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| Department |
Animal Nutrition Research Departement
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| Author(s) from ARC |
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Blood composition.
Carcass composition.
Digestibility.
Feed additives.
Impact assessment.
Lambs.
Rations.
Rumen.
Silage.
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| Publication Type |
Journal
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