Impact of Heat Stress on Selected Parameters of Robotic Milking
Abstract
:Simple Summary
Abstract
1. Introduction
2. Materials and Methods
2.1. Farms and Animals
2.2. Data Collection
2.3. Data Analysis
2.4. Statistical Analysis
3. Results and Discussion
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Farm | Type of the Automatic Milking System | Number of the Automatic Milking System on the Farm | Number of Dairy Cows | Average Annual Performance per Dairy Cow (kg) |
---|---|---|---|---|
A | Lely Astronaut A3 | 1 | 58 | 6517.00 |
B | Lely Astronaut A4 | 4 | 288 | 8717.56 |
C | Lely Astronaut A4 | 4 | 295 | 7500.00 |
D | Lely Astronaut A4 | 4 | 303 | 8710.25 |
Number of the Zone | Range of the Values in the Zone | Classification of the Zone |
---|---|---|
1 | 64–67 | stress-free zone |
2 | 68–71 | very mild stress zone |
3 | 72–79 | moderate stress zone |
4 | 80–89 | severe stress zone |
5 | 90–98 | extreme stress zone |
6 | 99–104 | death zone |
Number of the Zone | Description of the Zone |
---|---|
1. | 3 days before the zone of a very mild stress |
2. | very mild stress (68–71) |
3. | moderate stress zone (72–79) |
4. | the day after the decrease of THI under 68 |
Farm | Year | Days with Temperature-Humidity Index Value in Range of 68–71 | Days with Temperature-Humidity Index Value in Range of 72–79 |
---|---|---|---|
A | 1 | 22 | 31 |
2 | 19 | 12 | |
3 | 25 | 16 | |
B | 1 | 26 | 12 |
2 | 17 | 2 | |
3 | 16 | 7 | |
C | 1 | 26 | 29 |
2 | 18 | 12 | |
D | 1 | 26 | 4 |
2 | 12 | 2 | |
3 | 10 | 3 |
Farm | Parameter | Average | Minimum | Maximum | Standard Deviation |
---|---|---|---|---|---|
A | Milk yield per cow per day (kg) | 19.09 | 15.3 | 24.6 | 1.61 |
Average milk speed (kg/min) | 1.72 | 1.4 | 2.1 | 0.18 | |
Maximum milk speed (kg/min) | 2.81 | 2.6 | 3.2 | 0.13 | |
THI | 70.11 | 59.55 | 78.29 | 3.9 | |
B | Milk yield per cow per day (kg) | 28.96 | 18.8 | 38.3 | 3.23 |
Average milk speed (kg/min) | 2.81 | 2.3 | 3.3 | 0.17 | |
Maximum milk speed (kg/min) | 3.93 | 3.3 | 4.5 | 0.21 | |
THI | 68.04 | 58.74 | 75.84 | 3.58 | |
C | Milk yield per cow per day (kg) | 23.34 | 13.3 | 27.2 | 1.65 |
Average milk speed (kg/min) | 2.3 | 2.0 | 2.6 | 0.1 | |
Maximum milk speed (kg/min) | 3.3 | 3.0 | 3.8 | 0.14 | |
THI | 69.6 | 59.31 | 76.85 | 3.95 | |
D | Milk yield per cow per day (kg) | 31.27 | 24.3 | 38.3 | 2.46 |
Average milk speed (kg/min) | 2.93 | 2.3 | 3.3 | 0.16 | |
Maximum milk speed (kg/min) | 4.13 | 3.4 | 4.6 | 0.23 | |
THI | 67.55 | 59.83 | 74.86 | 3.36 |
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Gálik, R.; Lüttmerding, G.; Boďo, Š.; Knížková, I.; Kunc, P. Impact of Heat Stress on Selected Parameters of Robotic Milking. Animals 2021, 11, 3114. https://doi.org/10.3390/ani11113114
Gálik R, Lüttmerding G, Boďo Š, Knížková I, Kunc P. Impact of Heat Stress on Selected Parameters of Robotic Milking. Animals. 2021; 11(11):3114. https://doi.org/10.3390/ani11113114
Chicago/Turabian StyleGálik, Roman, Gabriel Lüttmerding, Štefan Boďo, Ivana Knížková, and Petr Kunc. 2021. "Impact of Heat Stress on Selected Parameters of Robotic Milking" Animals 11, no. 11: 3114. https://doi.org/10.3390/ani11113114