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English :
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Effect of dietary yeast cultures supplementation on the productive performance of lactating Damascus goats
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Arabic :
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تأثير اضافة الخمائر في العلائق على الاداء الانتاجى و تركيب اللبن للماعز الدمشقى الحلابة
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| Abstract |
Sixty lactating Damascus goats were divided into four groups: GI, represented the control group (G1), given 1.25 kg concentrate feed mixture without additives; G2, was given the control diet plus 5 g moreyeast (M) /head/day; G3, was given the control diet plus 1 g yeast selenium (YS) / head / day and G4, was given the control diet plus 2.5 g moreyeast + 0.5 g yeast selenium (MYS) /head/day. Milk yield was individually measured, recorded and samples were taken for chemical analysis. Total extraction was conducted for determination of fatty acids by gas liquid chromatography (GLC).
Daily milk yield did not significantly differ between supplemented and control groups, although, does supplemented with both more yeast plus yeast selenium (G4) were numerically had higher milk yield compared with the other groups. Chemical composition of milk including fat, total solids, ash and total volatile fatty acids content were not significantly affected by the applied' treatments. Protein content significantly increased. At the same time casein and whey protein contents were significantly higher in the treated groups compared to the control one. Fat, protein and total solids contents increased gradually with the progress lactation period reflecting opposite trend to milk yield. Control group showed the highest concentrations of caprylic and capric acids, while M (G2) showed the highest concentrations of palmitic, stearic, oleic, total unsaturated fatty acids, medium and long chain fatty acids. Also, YS (G3) had the highest content with respect to lauric, myristic and linoleic, while MYS (G4) had the highest of content isocaproic acid and short chain fatty acids in general.
In conclusion feed additives such as biological additives moreyeast + yeast selenium (MYS) increased milk yield and improved milk composition especially lipid composition.
Key words: goats, yeast, milk yield, milk composition, fatty acids
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| Publication year |
2013
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| Pages |
99-108
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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 Dairy Science
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| ISSN |
0378-2700
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| Author(s) from ARC |
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AGROVOC
TERMS |
Fats.
Fatty acids.
Goats.
Milk yield.
Proteins.
Selenium.
Yeasts.
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| Proposed Agrovoc |
milk composition;total solids;total volatile fatty acids;
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| Publication Type |
Journal
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