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English :
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Productive and reproductive performance of lactating cows fed corn silage without or with some of probiotics
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Arabic :
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الاداء الانتاجى و التناسلى للابقار الحلابة التى تغذت على سيلاج الذرة بدون او مع بعض التركيبات الحيوية
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| Abstract |
Thirty five pregnant Friesian cows (about two months before parturition till 120 days post calving) were randomly assigned to seven groups (5 in each) to assess the effect of using corn silage in daily ration without or with some of commercial Probiotics (dry live bacteria and dry live yeast) supplementation on nutrients digestibility, nutritive values, rumen activity, milk yield and its composition and reproductive performance for lactating cows.
Animals were fed the experimental rations as follows:
Ration (1): control ration: 60% concentrate mixture (CM) + 20 % clover hay (CH) + 20 % rice straw (RS).
Ration (2): 60 % CM + 20 % RS + 20 % corn silage (CS).
Ration (3): 60 % CM + 20 % RS + 20 % CS + 2 g dry live bacteria (DLB).
Ration (4): 60 % CM + 20 %RS + 20 % CS+ 10 g dry live yeast (DLY).
Ration (5): 40 % CM + 20 % RS + 40 % CS + 2 g DLB.
Ration (6) 40 % CM + 20 % RS + 40 % CS + 4 g DLB.
Ration (7): 40 % CM + 20 % RS + 40 % CS + 10 g DLY.
The results revealed that the digestibility of all nutrients were significantly (P<0.05) higher by using corn silage in R2 compared to control (R1). Nutrient digestibilities of the corn silage rations were significantly (P<0.05) improved by adding bacteria or yeast compared to unsupplemented and control rations. The nutritive values expressed as SV, TDN, DE and DCP showed the same trend of digestibility except DCP values decreased with increasing the level of com silage in the rations. Ruminal parameters (pH, Ammonia) TVFA's, VFA%, protozoa count and microbial protein) .were affected by using corn silage without additives in the rations or supplemented with bacteria or yeast cultures. Serum total protein, albumin, globulin, glucose and, total lipids concentrations were increased (P<0.05) by, either inclusion corn silage in the ration or adding bacteria and yeast cultures. However, cholesterol, GOT and GPT showed the reverse trend of the previous parameters. Moreover, milk yield and milk composition were improved with using corn silage in R2 compared to the control (R1). Also, milk yield was increased gradually in corn silage rations supplemented with bacteria or yeast (R3, R4, R5, R6 and R7) than unsupplemented ration (R2) or (R1). All experimental groups showed' nearly similar feed conversion as amount required from SV, TDN and DE to produce 1 kg 40/0 FCM except the DCP intake per kg 4% FCM was significantly (P<0.05) decreased especially with R5, R6 and R7, compared with other rations. Reproductive performance of cows fed R6 and R7 was improved compared to those fed other rations. From economical point of view use of R7 (40 % corn silage +10 g yeast/ cow/ day) could be recommended to improve milk production, feed conversion and reproductive performance.
Key words: Probiotics, bacteria, yeast, cows, productive, reproductive, performance, economic evaluation.
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| Publication year |
2007
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| Pages |
PP. 163
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| Availability location |
مكتبة معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى- الجيزة
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| Availability number |
1180
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| Organization Name |
Animal Production Research Institute (APRI)
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| Country |
Egypt
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| Author(s) from ARC |
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| Agris Categories |
Animal physiology - Reproduction
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AGROVOC
TERMS |
Bacteria.
Cows.
Economic analysis.
Performance testing.
Probiotics.
Production.
Reproductive performance.
Yeasts.
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| Publication Type |
PhD Thesis
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