Prediction of Total Tilk Yield from Partial Monthly Mield in Native Black Goats


Nazhad N. Maarof1, Hani. N. Hermiz2, Nashmil. G. Salih1, & Jalal. E. Alkass3

College of Agriculture, University of Sulaimani, 2 College of Engineering, Salahaddin University,
College of Agriculture, University of Duhok


Abstract
Data for the present investigation was collected on 41 native black does at the Bakrajou farm, college of
Agriculture, University of Sulaimania during March-August 2002.During the pre-weaning period, milk yield
was recorded once a week by suckling technique and hand milking. After weaning (90 days) does were hand
milked till they dry off.Total milk yield averaged 136.78 ± 7.70 kg, the maximum daily yield (1800 gm/d)
attained at 8th week of lactation. The correlation coefficients between total milk yield and monthly yield were

all positive and significant, the range being 0.32-0.98. Linear multiple regression equation using maximum R-
square improvement between total milk yield and monthly yield was calculated.

Keywords: Prediction equation, Milk yield, Goat.

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