Automatic recording of daily walkover liveweight of dairy cattle at pasture in the first 100 days in milk

Alawneh, J. I., Stevenson, M. A., Williamson, N. B., Lopez-Villalobos, N. and Otley, T. (2011) Automatic recording of daily walkover liveweight of dairy cattle at pasture in the first 100 days in milk. Journal of Dairy Science, 94 9: 4431-4440. doi:10.3168/jds.2010-4002

Author Alawneh, J. I.
Stevenson, M. A.
Williamson, N. B.
Lopez-Villalobos, N.
Otley, T.
Title Automatic recording of daily walkover liveweight of dairy cattle at pasture in the first 100 days in milk
Journal name Journal of Dairy Science   Check publisher's open access policy
ISSN 0022-0302
Publication date 2011-09
Sub-type Article (original research)
DOI 10.3168/jds.2010-4002
Volume 94
Issue 9
Start page 4431
End page 4440
Total pages 10
Place of publication New York, NY, United States
Publisher Elsevier
Collection year 2012
Language eng
Formatted abstract
Daily walkover liveweight (WoLW) records (n = 79,697) from 463 pasture-fed dairy cows from a single dairy herd in the lower North Island of New Zealand were recorded over the first 100 d of lactation. The aims of this study were to (1) describe LW records retrieved by a standalone automatic Wo daily weighing system; (2) describe the frequency and nature of outlier LW records measured by the system and develop an approach for excluding identified outlier LW records; (3) quantify the agreement between cow LW measured using the Wo system and those measured statically; and (4) describe the autocorrelation between daily LW measurements to provide an indication of how frequently management decisions need to be reviewed to effectively monitor cow LW change in the early-lactation period. The standard deviation of daily LW measurements across parities was 17. kg, on average. A near perfect association between LW measured statically and WoLW (concordance correlation coefficient 0.99, 95% CI 0.99-1.0) was observed. After controlling for the effect of LW at calving and long-term LW change using a mixed-effects linear regression model, the autocorrelation between WoLW recorded on successive days was 0.21, decaying to zero by 8 d. This study shows that by using a standalone automatic Wo weighing system positioned in the exit race of a rotary milking parlor, it was possible to record LW of individual cows on a daily basis and, with controlled cow flow over the weighing platform (allowing for sufficient succession distance to prevent congestion), results were similar to those recorded using conventional, static weighing techniques using the same scales. Based on the autocorrelation analyses, we recommend that LW are recorded on a daily basis to allow changes in physiological status such as the onset of acute illness or estrus to be detected. For managerial purposes, such as using LW change as a guide for adjusting the herd feeding program, we recommend a 7-d decision interval to effectively monitor significant changes in cows' recorded daily LW measurements
Keyword Automatic walkover weighing
Daily liveweight
Dairy cattle
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Veterinary Science Publications
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 8 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 10 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Thu, 12 Apr 2012, 21:46:22 EST by John Al-alawneh on behalf of School of Veterinary Science