EFFECT OF A HIGH-LEVEL AND A LOW-LEVEL MILK PIPELINE ON MILK FAT ACID DEGREE VALUES1

Abstract

Dairy farm milk pipelines located 2 ft below normal udder level and 4 ft above, respectively, were used to determine the effect of milk pipeline height on induced lipolysis. Three trials involving 86 cows and 54 observations were made. The combined data from the three groups, when averaged, indicated mean spontaneous Acid Degree Value increases above mean initial values of 0.68 for the low line and 1.16 for the high line. These results were highly significant (P <0.01) with milk handled through the high line showing a mean ADV increase of 0.48 more than the low line.