| Titles |
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English :
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The effects of different sources of low quality roughage on soybean meal protein degradation in the rumen of sheep
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Arabic :
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تأثير نوع مادة العلف الخشنة الفقيرة على درجة تكسير بروتين كسب فول الصويا في كرش الاغنام
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| Abstract |
Three experimental rations containing concentrate feed mixture and soybean meal (SBM) along with one of three roughages, namely rice straw (RS), maize stalks (MS) or clover straw (CS) were formulated to be similar in CP% (13-14%). Three mature male ruminally canulated sheep were fed at 90% of their ad libitum intake from each experimental ration.
The DM and CP disappearance values of SBM were in situ determined at 3, 6, 9, 12, 18 h of incubation with each experimental ration and effective degradability was assessed. The in situ disappearance values showed that the DMD of SBM was significantly (P<0.05) increased when fed with CS from 3h up to 6hr than fed with RS or MS, while DMD continued to increase (P<0.05) from 6hr up to 18h when fed with MS.
The DMD increased (P<0.05) when fed with CS than RS at 9h and 18h. The CP of SBM disappearance increased (P<0.05) at 3h up to 6h when fed with CS more than when led with RS or MS. The CP disappearance increased (P<0.05) more when led with MS or CS than with RS at 9h. It continued to increase (P<0.05) when led with MS than with CS or RS from 12h up to 18h, while it increased (P<0.05) when led with CS than with RS at the same period.
The effective degradability (ED) of DM was significantly increased (P<0.05) when fed with MS than when fed with RS or CS, while the ED of DM increased (P<0.05) when fed on CS than RS (57.57, 55.81 and 51.77%, respectively). The ED of the CP increased (P<0.05) when led with MS than with CS and at the beast was with RS ration (45.65,36.45 and 27.08%, respectively).
In conclusion, this study indicated that, although the crude protein (CP) is the most common method for expressing protein content, it fails to make important distinctions to the various contributors to poor-quality roughages. The simple measurements such as the degradable tractions (a, b and c) values are good indicators to distinguish between protein which degrades in the rumen and that which does not degrade. These different components of CP can be affected with the type of low quality roughage.
A clear understanding of these degradable tractions are needed to optimize the use of protein supplements with ruminants fed different low-quality forages.
Keywords : soybean meal, rice straw, maize stalks, clover straw effective degradability
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| Publication year |
2005
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| Pages |
117-126
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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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| serial title |
Egyptian Journal Nutrition and Feeds
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| Author(s) from ARC |
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| External authors (outside ARC) |
احمد زكى محرز
جامعة المنصورة
ايمان حنفى محمود مقلد
جامعة المنصورة
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Rice straw.
Roughage.
Rumen.
Sheep.
Soybean meal.
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| Proposed Agrovoc |
maize stalks;clover straw;
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| Publication Type |
Journal
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