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English :
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Nutritional studies on some green forage crops.(Fodder Beet, Beta vulgaris L.)
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Arabic :
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دراسات غذائية على بعض محاصيل العلف الخضراء (بنجر العلف)
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| Abstract |
This study was undertaken to fill some gaps in knowledge on the fodder beet as green forage to animals along two successive years.
The present investigation was included :-
-Filed experiment to determine the productivity of four varieties from fodder beet i.e. Rota, Monovert, Poly gramine and Brigadier.
- Determination of chemical composition and Gross Energy for leaves, roots and leaves hay of these experimented varieties.
- Effect of storage periods for 60 days after harvesting (extracting or up-rooted.) of the roots of Rota variety under rice straw and in the air to determine the percentages of DM losses and damage with reference to chemical composition.
- Five metabolism trials were performed using sheep fed fresh roots, fresh leaves, fresh whole plant (roots and leaves), roots stored under rice straw tOr40 days and leaves hay to determine the digestibility coefficients and feeding value including digestible energy and nitrogen balance.
- The daily intake from fodder beet fresh or stored were conducted with rams and the feed units intake as TDN, SV and DCP were also calculated for each animal.
- Laboratory digestibility (in vitro) for roots, leaves either fresh or storage to determine the In-vitro OM, DM and CP disappearances of four experimented varieties.
- The correlation between In-vitro and In-vivo digestibilities of fodder beet for the metabolism trials were conducted.
The results showed that:
1. Under reclaimed sandy soils, the total yield of the four varieties ranged from 49.10 to 91.19 ton/fed.
being the highest with var. Brigadier. However, the variety Monovert gave the highest DM yield 14.09 ton/fed.
2. The percentages of leaves/roots for the experimented varieties ranged from 5.57 to 10.17% on fresh basis
and from 2.56 to 4.38% from DM basis, the percentage of leaves yield to total yield ranged from 18.58 to 28.06%.
3.Chemical analysis of roots indicated that :-
a) The DM percentages being the highest in varieties Rota 15.08% and Monovert 15.0% and the lowest with variety Brigadier 10.45%.
b) The CP content fluctuated among the varieties from 8.64% for var.Brigadier to 11.44% for var. polygramine (on DM basis).
This trend showed also on fresh basis, the var. polygramine gave the highest CP percentages 1.60% and var.Brigadier gave 0.90%.
c) The EE contents were 1.18-2.77.% on DM basis and 0.12-0.42% on fresh basis being the highest in var.Rota and the lowest in var. Brigadier.
d) The CF percentages was significantly the highest with var. Rota 9.47%and 6.75-6.95% for the other va- rieties (on DM basis).
The corresponding values on fresh basis were 1.43% and 0.71-1.03%.
e) The NFE contents on DM basis ranged from 63.60 to 77.63%. However, on fresh basis, the values ranged from 8.11 to 11.08%.
f) Ash percentages of roots were in DM basis 5.80-13.99% being the highest in var. Rota and the lowest in var. Brigadier.These trend showed also on fresh basis, and the values being 0.61-2.11%.
g) Concerning the gross energy (GE), data showed that on DM basis, GE ranged from 377-383 Kcal/100g DM for the four varieties without significant differences.However,' on fresh basis the values were 40.02-57.30 Kcal/100 g.
4. Chemical analysis of fodder beet leaves and leaves hay showed that DM percentages of leaves were fluctuated among the varieties being from 29.17-33.33% for varieties Rota, monovert and polygramine. However, DM% was the lowest with leaves of var.Brigadier (13.62%). All nutrients in leaves and its hay were higher than fresh roots either on DM or fresh basis.
5. stored roots under rice straw after extracting till 60 days, data showed that the percentages of damage in fresh roots along the storage period ranged from 12.33-17.43%.However, the DM losses ranged from 31.75to 72.58% with increasing the storage period from 10-60 days.
Chemical analysis on DM basis, showed that CP, EE and CF were higher in fresh roots than stored roots.
The NFE and ash contents increased in stored roots than fresh roots. Gross energy not affected with storage period and being 370-382 Kcal/loo g DM.
On contrary, analysis on fresh basis indicated that DM, all nutrients and GE increased in stored roots at 60 days than fresh roots and also increased with increasing the storage period.
6. Storage roots in the air indicated that the loss in DM increased from 10.00% with 10 days to 59.11% with 60 days. Chemical analysis showed that on DM basis, CP, EE, CF and ash decreased and NFE increased in stored roots than fresh roots and GE content in fresh and stored roots being the same values. However, analysis on fresh basis showed that DM9fall nutrients and GE increasing gradually with increasing storage periods in stored roots compared with fresh roots.
7. Data of metabolism trials with fresh roots, fresh leaves, fresh whole plant, stored roots at 40 days and leaves hay fed to sheep indicated that:
a) Digestibility coefficients of DM, OM , CP, EE, CF, NFE and GE were the highest in stored roots than the other treatments. However, the lowest values showed with leaves hay.
b) The feeding value of the experimented treatments indicated that the values of TDN, SV, DCP and DE were the highest in leaves hay. However, concerning the fodder beet roots data showed that stored roots contained the highest feeding values than fresh roots, leaves and whole plant.
The feeding values on DM basis as TDN, SV and DE were the highest in stored roots than the other treatments. However, fresh leaves and whole a plant contained the highest DCP.
c) The nutritive ratio (NR) ranged from 1:3.19 to 1:7.14 for the all treatments being higher with fresh and stored roots and almost was the same figures with fresh leaves, whole plant and leaves hay.
d) The nitrogen balance of the five treatments was positive with mature rams. It ranged from 1.01-6.85 g N/ day/ sheep.
The nitrogen retention as a percentage
from eaten N and digestible N were 7.54-37.91 and 9.23-46.53, respectively.
8. The average DM daily intake increased with increasing DM content in eaten forage being the highest with leaves hay 1041 g DM sheep/day and the lowest with fresh roots 640 g DM/sheep/day. The DM intake/W0.75 showed the same trend.
The feed units yield as TDN, SV and DCP also affected with DM content in the forage. The SV and DCP of fresh roots, fresh leaves and whole plant could cover only the maintenance requirements of sheep. However, the daily intake of SV and DCP from stored roots and leaves hay could cover the maintenance requirements of sheep from energy and protein with sur-
plus for production.
9. Concerning the In vitro DM, OM and CP disappearances, results showed that the varieties Monovert and polygramine gave highest values either with fresh roots or fresh leaves than the other varieties Rota and Bri-gadier. However, the average In vitro DM, OM and CP disappearances for leaves hay were higher than fresh leaves.
10. The in vitro DM, OM and CP disappearances affected with storage period from 10 to 60 days increasing the storage period from 10 to 0days either under rice- straw or in the air. However, the In-vitro disappearances of DM, OM and CP not affected with the storage method. The values were practically the same with fodder beet roots stored under rice straw or in the air.
It could be concluded from this study that
fodder beet grow well in reclaimed sandy soils. This encourage to plant fodder beet for increasing the feed units yield and solve the problem of green forage especially in summer. Further studies are needed on fodder beet either in pure stand or inter~ cropped with some winter legume forage with conserve the forage to feed animals in summer.
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| Publication year |
1991
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| Availability location |
مكتبة معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
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| Availability number |
376
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| Organization Name |
Animal Production Research Institute (APRI)
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| Country |
Egypt
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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 |
Beta vulgaris.
Digestibility.
Feed crops.
Nutritive value.
Sheep.
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| Publication Type |
Master Thesis
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