Compositional Changes of Saanen X Kilis Goats’ Milk during Lactation (in English)

Abstract

Milks of 220 Saanen x Kilis goats’ were taken during 22 weeks of lactation. Chemical compositions, energy values and mineral contents of goats’ milk samples were determined. As results of the goats’ milk samples analyses, the mean values were determined as 12.12% for dry matter; 3.45% for fat; 3.81% for protein; 4.12% for lactose and 261.5 kj/100g for energy value, 6.86 for pH, 6.71 SH for titratable acidity and 1.031 g/cm3 for specific gravity during lactation. The mineral contents of the samples were similarly found to be 220.5 mg/100g for calcium; 108.8 mg/100g for phosphorus; 153.5 mg/100g for potassium, 20.1 mg/100g for mag¬nesium and 67.5 mg/100g for sodium. Results of the statistical analyses indicated significant lactational effects on the contents of total solids, fat, non-fat dry matter, protein, lactose, energy value, titratable acid-ity, pH, specific gravity (P<0.01) and sodium (P<0.05), but there was no similar effect on the contents of calcium, phosphorus, magnesium and potassium values of goats’ milk (P<0.05).

Keywords

• Goat milk, lactation, chemical, energy value, minerals

Laktasyon Dönemi Boyunca Saanen X Kilis Keçi Sütü Bileşimindeki Değişimler (İngilizce)

Abstract

Laktasyon dönemindeki 220 Saanen x Kilis keçilerinden haftada bir kez olmak üzere 22 hafta boyunca süt örnekleri alınmıştır. Keçi sütü örneklerinin kimyasal bileşimleri, enerji değerleri ve mineral içerikleri belir¬lenmiştir. Analiz sonuçlarında keçi sütlerinin bileşimleri ortalama olarak; kurumadde için %12.12, yağ için %3.45, protein için %3.81, laktoz için %4.12, enerji değeri için 261.5 kj/100g, pH için 6.86, titrasyon asitliği için 6.71 SH ve özgül ağırlık için 1.031 g/cm3 olarak bulunmuştur. Aynı şekilde süt örneklerinin mineral madde içeriği; kalsiyum için 220.5 mg/100g, fosfor için 108.8 mg/100g, potasyum için 153.5 mg/100g, mag¬nezyum için 20.1 mg/100g ve sodyum için 67.5 mg/100g olarak belirlenmiştir. Yapılan istatistiksel analiz sonucu laktasyon döneminin keçi sütlerinin kurumadde, yağ, yağsız kurumadde, protein, laktoz, enerji de¬ğerleri, asitlik, pH, özgül ağırlık (P<0.01) ve sodyum (P<0.05) değerlerine etkisinin önemli, kalsiyum, fosfor, magnezyum ve potasyum değerlerine etkisinin önemli olmadığı belirlenmiştir (P>0.05).

Keywords

• Keçi sütü, laktasyon, kimyasal, enerji değeri, mineraller

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