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English :
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Productive and reproductive performance of growing calves fed rations containing corn silage and poultry litter
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Arabic :
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الاداء الانتاجى و التناسلى للعجول النامية المغذاة على علائق تحتوى على سيلاج الذرة و فرشة الدواجن
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| Abstract |
This study consisted of productive and reproductive performance of growing Friesian calves fed rations containing com silage and poultry litter.
Eighteen growing Friesian calves were divided into three similar groups (six for each group) according to live body weight and age. Assigned randomly for the three experimental rations during the first and second periods as follows:
RA: (control ration): 64% concentrate mixture (CM) + 14% fresh berseem +' 22% rice straw (first period) or 48% concentrate mixture + 31 % berseem hay + 21 % rice straw (second period).
RB: 60% corn silage + 40% PLCGM (first and second period).
RC: 50% corn silage + 50% PLCGM (first and second period).
The obtained results could be summarized as foltows:
1. Com silage has normal values of good quality silage, pH (3.50), TVFA's (2% of DM), NH3-N (4.13% of total N), the concentrations of organic acids as % of OM were (6.4%) Lac. (4.40), Ac. (40.08), Pro.
(25.60), Isobul. (2.60), But. (28.00), Isoval. (2.15) and Val. (1.57).
2. Corn silage contained low DM, CP and ash, while it has high OM, CF and NFE contents compared with poultry litter, on the other hand, EE equal in both being (33.44 vs. 90.19%), (8.56 vs. 19.99%), (6.67 vs.
22.21%), (93.33 vs. 77.79%), (28.98 vs. 17.02%), (52.58 vs. 37.28%) and 3.21 vs 3.50%) on DM basis, respectively.
3. Poultry litter Na, Ca and P contents were of higher values than corn silage and other feedstuffs. While, berseem K contents were of higher values than other feedstuffs.
4. The contents of DM, CP and ash increased with increasing the level of concentrate mixture or poultry litter, while the contents of CF increased with increasing the level of corn silage in the rations.
5. The digestibility of OM and NFE by Friesian calves increased significantly (P<0.05) and subsequently TDN value increased in the first and second period with increasing the level of corn silage and poultry litter. While the digestibilities of CP and EE and subsequently DCP value increased significantly (P<0.05) with increasing the level of concentrate
mixture or poultry litter in the rations.
6. Ruminal pH increased with increasing the level of corn silage and poultry litter, while ammonia nitrogen and total volatile fatty acids increased with increasing the level of concentrate mixture or poultry litter in the rations.
7. No significance differences (P<0.05) were detected among treatments regarding concentration of blood plasma glucose, cholesterol, total protein, globulin, albumin to globulin ratio and GOT in the first and second periods, GPT in the first period, albumin in the second period. On the other hand, concentration of albumin in the first period and GPT in the second period increased significantly (P<0.05) with increasing the level of corn silage and poultry litter in the rations, while concentration of urea in the first and second periods increased significantly with increasing the level of concentrate mixture in the rations.
8. Friesian calves fed RA (control ration) recorded the highest intake and those fed RB and RC recorded the least intake of OM and TDN.
Moreover, CP and DCP intake increased with increasing the level of
concentrate mixture in the rations.
9. Average daily gain of calves fed RB (0.89 kg) was significantly lower (P<0.05) than those fed RA and RC (1.00 and 1.12) kg, respectively, during the first period, while calves fed RB had the highest daily gain during the second period (1.31 kg) compared with calves fed RA and RC (1.05 and 1.19 kg, respectively).
10. Friesian calves fed RB and RC recorded the highest feed and economic efficiency.
11. Plasma testosterone concentration increased significantly with increasing the level of corn silage and poultry litter in RB and RC compared with RA (control ration). The body weight and plasma testosterone concentration were increased gradually as age advance during the first and second periods.
12. Differences between rations and stages of sexual behaviour development in the age, body weight and level of testosterone were significant higher (P<0.05) for calves fed rations B and C coompared with RA at stage of first ejaculate without spermatozoa, puberty and maturity.
13. Ejaculate volume (ml), motility of spermatozoa (%) and sperm output/ejc. (x 109) increased significantly, while sperm concentration (x109/ml) increased, however abnormal and dead spermatozoa (%) decreased significantly with increasing the level of corn silage and poultry litter in the rations.
14. Concentration of K and P in the seminal plasma were increased significantly (P<0.05) by increasing the level of CS and PL. Also, the
concentration of Ca was increased significantly by increasing the level of corn silage.
15 The overall means of weight, width and thickness of testis, width caput, weight and length of corpus and length of cauda epididymis for Friesian calves increased significantly (P<0.05) with increasing the level of corn silage and poultry litter in the rations.
16. The conception rates for cows inseminated with frozen thawed semen in straws were 56.52, 54.55 and 57.69% from Friesian calves fed RA, RB and RC, respectively. The differences were not significant.
17. Hot carcass weight with or without offals were higher in calves received corn silage plus poultry litter compared with the control ration. The same trend was approximately observed concerning dressing percentage with or without offals on the basis of fasting or empty weight.
18. There were no significant differences (P<0.05) in weights and percentages of boneless meat and bone between calves fed the different rations.
19. The weights of carcass fat increased and also, the weights and percentages of 9, 10 and 11th ribs cuts lean increased and bone decreased significantly (P<0.05) with increased the level of corn silage and poultry litter in the rations.
20. Fat thickness, values of eye muscle increased significantly (P
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| Publication year |
2003
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| Pages |
206p.
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| Availability location |
معهد بحوث الانتاج الحيوانى- شارع نادى الصيد - الدقى - الجيزة
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| Availability number |
830
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| Organization Name |
Animal Production Research Institute (APRI)
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| Country |
Egypt
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| Department |
Cattle Breeding Research Department
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| Author(s) from ARC |
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| Agris Categories |
Animal physiology - Nutrition
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AGROVOC
TERMS |
Calves.
Litter for animals.
Performance testing.
Production.
Reproduction.
Silage.
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| Publication Type |
PhD Thesis
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