| Titles |
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English :
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Using clays to improve urea utilization in ruminant rations
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Arabic :
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استخدام معادن الطين لتحسين الاستفادة من اليوريا في علائق المجترات
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| Abstract |
This study was conducted Center, investigate the effect of adding clays to ruminant rations containing high levels of urea Four metabolism trials on rams aim ed to study the effect of adding each of bentonite, kaolin and tafla at a rate of 3%: on digestibiltiy, N-balance, water intake, rumen fluid parameters and blood constituents of rams fed a ration containing 3% urea. The four compared rations were:
1- 100 ration containing 3% urea (control).
2- 100% ration containing 3% urea + 3% bentonite.
3- 100% ration containing 3% urea + 3% kaolin.
4- 100% ration containing 3% urea + 3% tafla.
A growth trial lasted 18 weeks (126 days) was conducted on two groups of lambs. One group fed ureated ration ( U) alone, the other group
Fed ureated ration with 3% tafla (UT) .
The obtained results could be summarized as follow:-
I-Metabolism trial:
1- Rams fed the rour rations were approximately consumed similar amounts of feed and drinking water, except those received betonite had drunk more water than others.
2- Clays improved nutrients digestibilities, specially those fed kaolin or tafla which showed significant increase: (P<0.01) in DM, OM and CP digestion coefficients. Better digestibilities reflected on high nutritive values expressed as SE, TDN, and DCP.
3- The presence of kaolin or tafla in the ration significantly (P<0.01) increased the retained nitrogen.
4- Comparing the effect of clays on rumen fluid characteristics there were no significant differences in ruminal pH, total volatile fatty acids,
and microbial protein. But the total number of protozoa increased (p< 0.05) by feeding kaolin or tafla.
5- The clay supplemented rations showed lower rumen NH3-N at the peak time, 1-2 h postfeeding.
6- The blood serum urea-N and the serum transaminase enzymes
( GOT and GPT) were decreased (P < 0.05 ) by kaolin and tafl a supplementation, while bentonite showed opposite results.
7- The investigated clays had no harmful effect on rams health and no symptoms of urea toxicity were observed during the experimental period. II- Growth trial:
1- Lambs received urea alone (U ration) or with tafl a (UT ration) consumed approximately similar amounts of feed and water. -
2- Lambs fed urea plus tafl a showed better growth performance than those received urea alone.
3-The feed conversion of lambs fed U ration was higher than that of those fed UT ration -
4-The lambs fed U or UT rations were not significantly differed in their ruminal pH , total volatile fatty acids microbial protein and total number of protozoa.
5- Concentration of NH3 - N at one h post feeding ( peak ) was decreased
of the as a results adding tafla to ureated ration. Meanwhile its level at 4 to 6 h post- feeding was higher.
6- Blood serum NH3-N and urea-N of lambs fed UT ration were significantly higher than the corresponding figures of lambs fed UT ration . The activities of serum trans- aminases (GOT and GPT) of lambs fed ureated ration were significantly higher (P < 0.01) than those for lambs fed ureated ration p1us taf1a .
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| Publication year |
1990
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| Availability location |
مكتبة معهد بحوث الانتاج الحيوانى - شار ع 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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| Author(s) from ARC |
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Clay.
Lambs.
Rations.
Ruminants.
Urea.
Uses.
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| Publication Type |
Master Thesis
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