Effects of Milking at Unequal Intervals for a Complete Lactation on Milk Yield and Composition

The effects of milking at unequal intervals for a complete lactation were studied with 82 cows of the Holstein, Ayrshire, and Brown Swiss breeds. They were milked at intervals of either 12.5 and 11.5 (Equal Intervals) or 14.5 and 9.5 (Unequal Intervals) during their first lactation, then switched to...

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Bibliographic Details
Published in:Journal of dairy science 1967-10, Vol.50 (10), p.1597-1605
Main Authors: Ormiston, E.E., Spahr, S.L., Touchberry, R.W., Albright, J.L.
Format: Article
Language:English
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Summary:The effects of milking at unequal intervals for a complete lactation were studied with 82 cows of the Holstein, Ayrshire, and Brown Swiss breeds. They were milked at intervals of either 12.5 and 11.5 (Equal Intervals) or 14.5 and 9.5 (Unequal Intervals) during their first lactation, then switched to the alternative intervals during the second lactation. With standardized 266-day lactation periods and the cows milked at equal or unequal intervals, the yields were 4,920, 4,811; 186, 181; 456, 441; and 647, 617kg of milk, milk fat, solids-not-fat (SNF), and total solids (TS), respectively. A least squares analysis indicated that the cows produced 160±90kg (3.5%) more milk (P ≅ .08), 9±4kg (5.0%) more milk fat (P
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(67)87679-3