2005 2006 2007 2008 2009 Total
*Voluntary Culling 315
(0.89%)
528
(1.35%)
606
(1.38%)
546
(1.25%)
752
(1.58%)
549.4 ± 70.60b
(1.29%)
Involuntary Culling 6254
(99.11%)
6413
(98.65%)
10037
(98.62%)
7457
(98.75%)
8230
(98.42%)
7678.2 ± 690.88a
(98.71%)
a,bDifferent letters indicate statistical difference within column (P<0.05).
*Voluntary culling including low milk production in the absence of a known disease problem, old age, body condition, surplus to herd requirements and all other voluntary culling.
Table 3: Reasons for culling cows (voluntary and involuntary), in 74 studied dairy herds in Tehran province, Iran (2005-2009).