Effects of quarter take-off with and without machine stripping under simulated automatic milking conditions

Citation
D. Weiss et H. Worstorff, Effects of quarter take-off with and without machine stripping under simulated automatic milking conditions, MILCHWISSEN, 56(8), 2001, pp. 427-430
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Food Science/Nutrition
Journal title
MILCHWISSENSCHAFT-MILK SCIENCE INTERNATIONAL
ISSN journal
0026-3788 → ACNP
Volume
56
Issue
8
Year of publication
2001
Pages
427 - 430
Database
ISI
SICI code
0026-3788(2001)56:8<427:EOQTWA>2.0.ZU;2-I
Abstract
In conventional machine milking, unequal yield and flow time between quarte rs leads to overmilking of single teats. Quarter specific take-off is used in most automatic milking systems (AMS) to overcome this problem. Automatic stripping is not yet incorporated to AMS. To analyse the effects of quarte r take-off with and without stripping, 360 milkings were carried out in 2 t andem boxes with 15 cows (av. yield 29.4 kg/d) milked twice daily by 2 peop le handling original AMS individual teat cups. Milk flow was monitored by q uarter sensors and registered per udder by strain gauge recorder jars. Quarter specific routines saved about 20 % teat cup-on time relative to mac hine stripping at 320 g/min per udder, but quarter take-off left 590g of mi lk (per cow and milking) as hand stripping. Quarter stripping with start th resholds of 200g/min/quarter and take-off at 90g/min/quarter fully gained t his amount and reduced average teat cup-on time (6.18 min vs. 6.54 min, p l ess than or equal to 0.05) compared to quarter take-off. Average flow per t eat cup-on time was higher with than without stripping (2.35 kg/min vs. 2.2 1 kg/min p less than or equal to 0.05). Machine stripping changes the milk flow pattern eliminating the need for a final delay between take-off signal s and cup removal.