Quarter-controlled milking in dairy cows

Ipema, A.H.; Hogewerf, P.H.

doi:10.1016/j.compag.2007.09.007

Cited by 15 publications

(16 citation statements)

References 2 publications

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“…Milk yield from the right front quarter was 1.8 % or 0.2 kg more compared with yield from the left front quarter (P<0.05). As described by other authors (Ipema et al, 2008; Antalik et al, 2010) the total milk yield significantly differed between all four quarters within an udder. It depends from what part of the quarters (front or rear) milk is produced (Tančin et al, 2006) as well as the health status of dairy cows.…”

Section: Resultssupporting

confidence: 74%

Quarter milking parameters by lactation in dairy cows

et al. 2019

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The study was conducted on 229 dairy cows in Lithuania. DeLaval milking robots were used for cows’ milking. Milk yield (kg), milking duration (min), milk flow (kg/min), peak flow rates (kg/min) by cow lactation in separate udder quarters were analyzed. The statistical analysis of the research data was performed using the data collection and analysis program package Statistical Package for Social Science 22 for Windows, Kolmogorov-Smirnov test and One-Factor Dispersion Analysis (ANOVA) model. Distribution of the udder quarters is very important in the cow milking process. Milk yield from cow front udder quarters was about 4.6 kg (42.2 %) and from rear udder quarters 6.32 kg (57.8 %) (P<0.05). The milk content in front quarters was significantly lower than in the rear udder quarters in all dairy cows (P<0.05). Cows of the first lactation showed lower milk production per milking in all udder quarters when compared to other lactation cows (P<0.05). The duration of milking of cows in third and more lactation in front quarters was shorter than that of the first lactation cows (P<0.005). Along the increase in the number of cows’ lactations, the milking time in the front quarters decreased. The average milk flow and the peak flow in the first lactation cows were found to be lower than that in older cows (P<0.05).

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Section: Resultssupporting

confidence: 74%

Quarter milking parameters by lactation in dairy cows

et al. 2019

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“…Quarter peak milk flow rate in case and control quarters ranged from 1.43 to 1.64 kg/min (Table 1) and was greater than QPMF of 1.03 kg/min reported by Ipema and Hogewerf (2008), who enrolled cows that had average daily milk yield of 32 kg that may be considered comparable to our study group. A high degree of correlation between udder (Rothenanger et al, 1995;Halley et al, 2001) and quarter (Weiss et al, 2004) AMF and peak milk flow rate (PMF) has been observed; thus, PMF provides a sound predictor of overall milking speed as indicated by AMF.…”

mentioning

confidence: 51%

Short communication: Cow- and quarter-level milking indicators and their associations with clinical mastitis in an automatic milking system

Penry

Crump

Ruegg

et al. 2017

Journal of Dairy Science

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The aim of this study was to assess associations of cow-, udder-, and quarter-level factors with the risk of clinical mastitis (CM) in cows managed using an automatic milking system. The primary hypothesis was that quarter peak milk flow rate (QPMF) is associated with increased risk of CM. A retrospective, case-control study was undertaken using data from a 1,549 cow farm using 20 automatic milking system units. All data from cows milked during March to December 2015 was available for analysis. Cases (n = 82) were defined as cows diagnosed with their first case of CM between 24 and 300 d in milk in the current lactation. Healthy control cows (n = 6/case) were randomly matched based on identical parity, existence of milk records during the day in milk period corresponding to the 15-d window before case diagnosis, average conductivity of <5.5 mS/cm in that window, and no history of CM in the current lactation. Logistic regression was used to estimate effects of parity, quarter position, day in milk at diagnosis of CM, average of QPMF 15 d before CM diagnosis, udder milk yield, and milking interval on the probability of CM. Of the 6 predictor variables included in the model, only milking interval was significantly associated with the increased risk of quarter CM. We concluded that in a high-production, freestall-housed North American herd using automatic milking system, milking interval, but not QPMF, was associated with risk of CM.

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“…According to Lee and Choudhary (2006), tMGG might be influenced among other things from animal physiological effects, management practices and vacuum pressure. Ipema and Hogewerf (2008) determined that the vacuum level did not affect MGG, but tMGG decreased significantly when the vacuum was raised from 42 to 45 kPa. A further increase of the vacuum level from 45 to 48 kPa caused no significant decrease of tMGG.…”

Section: Discussionmentioning

confidence: 96%

Comparison of the effects of quarter-individual and conventional milking systems on milkability traits

et al. 2011

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This study was carried out to investigate a new quarter-individual milking system called MultiLactor® (Siliconform GmbH, Türkheim, Germany). The MultiLactor enables milking on quarter level basis with low vacuum (37 kPa), sequential pulsation and periodic air inlet. Within the same dairy farm, the influence of this quarter-individual milking system (MULTI) on milkability traits was compared with a conventional milking system (CON). CON was equipped with a conventional milking cluster and used alternating pulsation. Vacuum level was adjusted to 40 kPa. For the study, 84 Holstein Friesian cows were randomly selected and uniformly divided into two herds. During the 30-week survey, the milk flow curves were recorded every other week by using a LactoCorder (WMB, Balgach, Switzerland). Significant differences (P<0.05) between both milking systems were found for all milk flow traits, except for milk yield and decline phase. Concerning the incline (tAN) and plateau (tPL) phase, large differences existed between MULTI and CON. The estimated value of tAN calculated for MULTI (29.4 s) took only half of the time when calculated for CON (56.4 s). The estimated value of tPL at CON was reduced by 1.43 min (35 %) compared to MULTI. Milking process at MULTI (8.49 min) took longer time than for CON (7.43 min). From the study, it was concluded that the effect of shorter tAN in the quarter-individual milked cows may be related to additional prestimulation by an actuator. In contrast, the longer milking time in MULTI is possibly caused by lower vacuum level and periodic air inlet. Keywords

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Quarter-controlled milking in dairy cows

Cited by 15 publications

References 2 publications

Quarter milking parameters by lactation in dairy cows

Quarter milking parameters by lactation in dairy cows

Short communication: Cow- and quarter-level milking indicators and their associations with clinical mastitis in an automatic milking system

Comparison of the effects of quarter-individual and conventional milking systems on milkability traits

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