ICAR Technical Series no. 7 - Nitra Proc.

Influence of duration of a and c phaseWhen a and c phases were decreased from adjustment 3 to adjustment 1,TMT and MMT respectively increased of 4.1 % and 6.1 %. The sametendency was found when analysing results at each vacuum level (Table 2).TMT and MMT had a bigger increase with the lower vacuum levels. Forexample, MMT raised from 11.2 %, 8.7 % and 6.4% respectively at 39, 42and 45 kPa between adjustment 3 and adjustment 1 .Table 2. Total milking times (TMT) for each vacuum level(seconds/cow/day).Vacuum level (kPa) 39 42 45Adjustment1 767,4 a 748,1 a 695,0 a2 748,1 a b 729,1 a b 695,9 a b3 695,0 b 700,2 b 663,8 bValues with different letters within the same column indicate significantdifferences (P