A comparative study on milk yield and its composition between black mountain and damascus (Shami)‎ goats raised at commercial farms

المؤلفون المشاركون

al-Dabbagh, Azad. Sh. S.
Uramari, Rabi A. S.

المصدر

مجلة جامعة دهوك

الناشر

جامعة دهوك

تاريخ النشر

2016-06-30

دولة النشر

العراق

عدد الصفحات

9

التخصصات الرئيسية

العلوم الطبيعية والحياتية (متداخلة التخصصات)

الملخص الإنجليزي

This study was conducted on 25 Black mountain does and 28 Damascus does raised at two commercial flocks at Qultapa village at Qushtapa settlement in Erbil plain during December, 2010 to July, 2011.

Milk traits consist of 290 monthly records of test day milk yield.

All the studied milk traits and milk samples to determined milk compositions were recorded at monthly interval starting one month post kidding till the does were dried off.

Overall mean ± S.E.

of test day milk yield (TDMY), Daily milk yield (DMY), total milk yield (TMY), pre-weaning milk yield (PrWMY), post-weaning milk yield (PWMY) and peak mild yield (PMY) were 0.829 0.03, 1.660.12, 136.04 9.97, 78.886.55, 57.166.09 and 2.650.18 kg, respectively.

Breed had a significant (P<0.01) effect on TDMY, DMY, TMY, PrWMY, and the effects were significant (P<0.05) on PWMY and PMY.

Also the effect of age of doe was significant (P<0.01) only on TDMY.

Moreover the month of kidding and stage of lactation had a highly significant effect on PWMY and TDMY, respectively.

Overall mean  S.E.

of fat (F%), protein (P%), lactose (L%), total solid (TS%) and solid non fat (SNF%) were 3.800.09, 5.130.06, 4.490.01, 14.240.14 and 10.440.07%, respectively.

Effect of breed was significant (P<0.01) only on F%.

Effects of month of kidding was significant on F% and TS% (P<0.01), P%, and SNF% (P<0.05).

The effect of stage of lactation on milk compositions except SNF% were significant (P<0.01).

Correlation coefficients were negative, but no significant among TDMY and milk components, whereas there were highly significant correlations among milk compositions.

Repeatability estimates by REML method for TDMY was 0.254.

نوع البيانات

أوراق مؤتمرات

رقم السجل

BIM-797359

• APA
• MLA
• AMA