Milk Yield, Milking Time and Milk Flow Rate of West African Dwarf, Yankasa and Crossbred Ewes in Relation to Milking Machine

2009 ◽  
Author(s):  
Babatunde Adewale Adewumi ◽  
Olajumoke Olusola Adewumi ◽  
Olaniyi Bidemi Oke
Keyword(s):  
Milk Yield ◽  
Flow Rate ◽  
West African ◽  
West African Dwarf ◽  
Milk Flow ◽  
Milking Machine

scholarly journals Interruption of machine milking in dairy cows: effects on intramammary pressure and milking characteristics

1995 ◽  
Vol 62 (4) ◽  
pp. 559-566 ◽  
Author(s):  
Hans-Ulrich Pfeilsticker ◽  
Rupert M. Bruckmaier ◽  
Jürg W. Blum
Keyword(s):  
Milk Yield ◽  
Flow Rate ◽  
Removal Rate ◽  
Total Yield ◽  
Machine Milking ◽  
Ejection Rate ◽  
Milk Flow ◽  
Total Milk ◽  
Series Of Experiments ◽  
Milking Machine

SUMMARYExperiments were designed to test the hypothesis that milk ejection rate decreases during milking, thereby causing insufficient refill of the cistern and decreasing milk flow rate towards the end of milking. In a first series of experiments machine milking of the left front quarters of 11 cows was interrupted for 2 min after removal of 25, 50 or 75% of expected total milk yield, while milking was continued in the other three quarters. Milk flow was recorded during machine-on times. Intramammary pressure (IMP) was recorded during premilking teat stimulation and during interruption of milking. IMP during interruption of milking decreased with decreasing amounts of milk remaining in the udder. The IMP did not change during these interruptions when they occurred after 25 and 50% of expected total milk yield was removed. Thus, the ejection rate could keep up with the milk flow or removal rate. However, IMP increased during interruption of milking following removal of 75% of total yield, although significantly so only in cows with a high milk flow rate. Obviously, more milk was removed than was transported to the cisternal cavity. It is likely that a reduced ejection rate caused the decreased milk flow rate. In a second series of experiments the pulsation ratio of the milking machine was changed from the usual 70:30 to 50:50 with the aim of reducing the milk flow rate and thus adapting to the ejection rate at the end of milking. The changed pulsation ratio caused a reduced peak flow rate and a prolonged high milk flow period, whereas the main flow rate did not change significantly.

scholarly journals Milkability evaluation of Holstein dairy cows by Lactocorder

2011 ◽  
Vol 28 (2) ◽  
pp. 139-146 ◽  
Author(s):  
Peter Strapák ◽  
Peter Antalík ◽  
Iveta Szencziová
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Flow Rate ◽  
Flow Characteristics ◽  
Detailed Comparison ◽  
Milk Flow ◽  
Lactation Stage ◽  
Total Milk ◽  
Positive Correlations ◽  
Holstein Dairy Cows

Milkability evaluation of Holstein dairy cows by LactocorderThe aim of this work was to evaluate chosen milk flow characteristics of Holstein dairy cows, using mobile electronic milk flow meters - Lactocorders. A total of 181 Holstein dairy cows were evaluated and divided according to parity, lactation stage and bimodality in order to carry out a detailed comparison of measured milkability traits. The average total milk yield was 11.98±3.41 kg per milking with an average milk flow rate of 2.52±0.75 kg min-1 and a maximum milk flow rate of 3.94±1.30 kg min-1. The total milk yield showed positive correlations with the average milk flow rate (r = 0.48; P<0.001) and also with the maximum milk flow rate (r = 0.32; P<0.001). More than 47% of milk flow curves were classified as bimodal. Bimodality was positively correlated with the duration of the incline phase (r = 0.73; P<0.001) and negatively correlated with the quantity of milk obtained during the first minute of milking (r = -0.34; P<0.001). In relation to the lactation stage - the highest average milk flow rate was reached by Holstein dairy cows at the beginning of the lactation (up to 100 days in milk), and in relation to parity - the highest milk flow rates were measured in second-lactation dairy cows.

Effects of Milking Methods on Milk Yield, Milk Flow Rate, and Milk Composition in Cow

2020 ◽  
Vol 10 (1) ◽  
pp. p9765
Author(s):  
Anand Mishra ◽  
Shailendra Khatri ◽  
Sanjeet Kumar Jha ◽  
Shamshad Ansari
Keyword(s):  
Milk Yield ◽  
Flow Rate ◽  
Milk Composition ◽  
Milk Flow

Effects of oxytocin administration on milk yield and milk composition of West African Dwarf does

2019 ◽  
Vol 181 ◽  
pp. 45-50 ◽  
Author(s):  
Emmanuela U. Nwosu ◽  
I.J. James ◽  
O. Olowofeso ◽  
T.J. Williams ◽  
Martha N. Bemji
Keyword(s):  
Milk Yield ◽  
Milk Composition ◽  
West African ◽  
West African Dwarf

Effect of parity on changes in udder traits, milk yield and composition of West African dwarf sheep during lactation

2017 ◽  
Vol 57 (6) ◽  
pp. 1047 ◽  
Author(s):  
E. O. Adegoke ◽  
N. S. Machebe ◽  
A. G. Ezekwe ◽  
O. B. Agaviezor
Keyword(s):  
Milk Yield ◽  
Significant Role ◽  
Total Solid ◽  
Milk Composition ◽  
West African ◽  
West African Dwarf ◽  
Lactation Length ◽  
Length Width ◽  
West African Dwarf Sheep ◽  
Dwarf Sheep

Twelve West African Dwarf sheep, comprising four ewes in each of the Parities 1, 2 and 3, were used to determine the effect of parity on udder traits during lactation, milk yield and composition. Udder length, udder width, udder circumference, udder volume, teat length, teat width, teat circumference, distance between the teats and teat height from the ground of sheep were measured in centimetres (cm) weekly for 12 weeks of lactation, commencing from Day 4 postpartum. Parity highly influenced (P < 0.05) udder traits, except udder volume (P > 0.05). The udder length, width and circumference were higher (P < 0.05) in Parity-3 ewes than Parity-1 and -2 ewes. A similar trend was shown for teat length, width and circumference. Parity had no effect (P > 0.05) on udder volume, but significantly (P > 0.05) affected distance between the teats and teat height from the ground. With the exception of udder volume, all traits peaked by the 3rd week of lactation, and gradually declined thereafter. Milk yield and milk weight peaked by the 3rd week postpartum and these were higher for ewes in Parity 3. Milk yield and milk weight declined faster in ewes in Parities 1 and 2 than they did in Parity-3 ewes (P < 0.05) as lactation length increased. In regard to milk composition, moisture, protein and fat, but not total solid, solid-not-fat and lactose, were greater (P < 0.05) in Parity-3 ewes both at peak milk yield (3rd week of lactation) and end of lactation. From these findings, we conclude that parity type plays a significant role in influencing udder traits, milk yield and milk quality in ewes.

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