scholarly journals Evaluation of stress in dairy cows due to change in housing, milking frequency and milking equipment

2021 ◽  
Vol 12 (4) ◽  
pp. 362
Author(s):  
A. M. Gadzhiev ◽  
D. V. Osepchuk ◽  
B. S. Nikkolova ◽  
Z. A. Kubatieva ◽  
M. S. Gazzaeva ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Milking Frequency

scholarly journals Influence of Milking Frequency on Productive and Reproductive Efficiencies of Dairy Cows

1985 ◽  
Vol 68 (3) ◽  
pp. 732-739 ◽  
Author(s):  
H.E. Amos ◽  
Terry Kiser ◽  
M. Loewenstein
Keyword(s):  
Dairy Cows ◽  
Milking Frequency

scholarly journals Effect of milking frequency on the behavior and productivity of lactating dairy cows

2013 ◽  
Vol 96 (11) ◽  
pp. 6973-6985 ◽  
Author(s):  
K.D. Hart ◽  
B.W. McBride ◽  
T.F. Duffield ◽  
T.J. DeVries
Keyword(s):  
Dairy Cows ◽  
Lactating Dairy Cows ◽  
Milking Frequency

Milking frequency affects the circadian body temperature rhythm in dairy cows

2008 ◽  
Vol 117 (2-3) ◽  
pp. 130-138 ◽  
Author(s):  
P.E. Kendall ◽  
C.B. Tucker ◽  
D.E. Dalley ◽  
D.A. Clark ◽  
J.R. Webster
Keyword(s):  
Body Temperature ◽  
Dairy Cows ◽  
Temperature Rhythm ◽  
Body Temperature Rhythm ◽  
Milking Frequency

Effect of low light intensity at night on cow traffic in automatic milking systems

2014 ◽  
Vol 54 (10) ◽  
pp. 1784
Author(s):  
Fanny Hjalmarsson ◽  
Ingemar Olsson ◽  
Sabine Ferneborg ◽  
Sigrid Agenäs ◽  
Emma Ternman
Keyword(s):  
Light Intensity ◽  
Dairy Cows ◽  
Milk Yield ◽  
Negative Impact ◽  
Night Time ◽  
Low Light ◽  
Milking Frequency ◽  
Automatic Milking ◽  
Automatic Milking Systems ◽  
Reduced Light

Several studies have shown benefits of long-day (16 h) photoperiod in lactating dairy cows, but have not identified a suitable light intensity for the dark hours. It is known that the locomotion pattern of dairy cows is altered at low light intensities and this may translate to reduced cow traffic and milking frequency, which would have a negative impact on system productivity. However, it is also recognised that a significant disturbance of rest may have a negative impact on the health and productivity of high-yielding dairy cows. This study examined the effect of three different night-time light intensities (LOW: 11 ± 3, MED: 33 ± 1 and HIGH: 74 ± 6 lx) on number of gate passages, milking frequency and milk yield in dairy cows in automatic milking systems. The study was conducted in Sweden during the winter of 2012–13 and the treatments were applied in a crossover design to three herds with an automatic milking system. Minimum day time light intensity was 158 lx. Data on gate passages, milking frequency and milk yield for 172 ± 49 (mean ± s.d.) cows during the last 22 days of each 34-day study period were analysed for treatment differences and differences in daily distribution over 24 h, during day time and night time. Light intensity did not affect total number of gate passages per 24-h period and cow, but number of gate passages per hour and cow was in all treatments lower during night time than during day time. Milking frequency was increased in MED compared with both HIGH and LOW (P < 0.05). Milk yield decreased with reduced light intensity, and differed significantly between HIGH and LOW treatments, 45 ± 1 kg and 44 ± 1 kg, respectively (P < 0.001). Our conclusion is that reducing light intensity to 11 lx at night time does not affect cows’ general activity as gate passages remained the same for all treatments. However, milk yield decreased with reduced light intensity, which might be related to a lower feed intake. We argue that providing night light for dairy cows, as required by many welfare acts, might be related to production level rather than welfare aspects and that the recommendations should be revised.

scholarly journals Effect of Milking Frequency and Diet on Milk Production, Energy Balance, and Reproduction in Dairy Cows

2006 ◽  
Vol 89 (5) ◽  
pp. 1478-1487 ◽  
Author(s):  
J. Patton ◽  
D.A. Kenny ◽  
J.F. Mee ◽  
F.P. O’Mara ◽  
D.C. Wathes ◽  
...  
Keyword(s):  
Energy Balance ◽  
Dairy Cows ◽  
Milk Production ◽  
Milking Frequency

scholarly journals Effects of DGAT1 K232A polymorphism and milking frequency on milk composition and spontaneous lipolysis in dairy cows

2016 ◽  
Vol 99 (7) ◽  
pp. 5739-5749 ◽  
Author(s):  
E. Vanbergue ◽  
J.L. Peyraud ◽  
J. Guinard-Flament ◽  
C. Charton ◽  
S. Barbey ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Milk Composition ◽  
Milking Frequency

scholarly journals Effect of Temperature-Humidity-Index on Milk Performances of Local Born Holstein Dairy Cows Under Saharan Climate

2021 ◽  
Vol 24 (2) ◽  
pp. 24-36
Author(s):  
Lazoumi Ouarfli ◽  
Abdelmadjid Chehma
Keyword(s):  
Heat Stress ◽  
Dairy Cows ◽  
Environmental Conditions ◽  
Arid Regions ◽  
Effect Of Temperature ◽  
Significant Drop ◽  
Temperature Humidity Index ◽  
Lactation Length ◽  
Humidity Index ◽  
Milking Frequency

Abstract The objective is to study the effect of heat stress on milk yield (MY) relative to milking records (n=18178) of native Holsteins (n=187), in the region of Ghardaia, according to periods of HS, using the temperature-humidity index (THI). With THI >72 during 07 months in the study area, which significantly (P<0.001) decrease the MY (-15.5% corresponding to 21.73 kg). Also, calving periods led to a significant drop (P < 0.001) in overall MY (7030.35 kg) of the order of (-14.6%), and over the lactation length (353.43 d), which explains 41% of the variations in MY. In addition, the non-significant effect (P=0.212) of the lactation range on the increase in MY, moreover, the lactation length shows a non-significant (P = 0.108) decrease (-4.68%) during heat stress (HS). Furthermore, the significant effect (P <0.001) of the interaction (Milking frequency × THI) on MY, when THI variates from < 74 to > 84, with regression of (-16.82% and -08.82%) of the MF (2X and 3X), respectively. Again, the NH cow is less sensitive to hyperthermia, so THI explains only 2% of the variation in MY levels. Thus, NH in arid regions have the ability to acclimatize to Saharan environmental conditions.

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