Abstract
The effect of heat stress on changes in milk production, rectal temperature, respiratory rate and blood chemistry was evaluated in three groups of six mature Holstein, Jersey and Australian Milking Zebu (AMZ) dairy cows. These animals were subjected to a cool environment when the mean temperature-humidity index (THI) was 72±1.4 (dry bulb temperature of 22.2-24.4°C and relative humidity of 100-60%) during the month of December. This experiment was repeated during the hotter month of July of the following year, when the mean THI was 93±3.1 (dry bulb temperature of 35.6-43.9°C and relative humidity 95-35%). Holstein cows produced more (p2 (kPa), bicarbonate (HCO 3 -, mmol/L), base excess (BE, mmol/L) and plasma chloride (Cl -, mmol/L) in all three breeds. The total haemoglobin (THb, g/dl) was elevated (p2SAT, %) in Jersey and AMZ cows but lowered it (p2 (kPa) in Holstein and Jersey cows but lowered it (p
| Original language | English |
|---|---|
| Pages (from-to) | 685-692 |
| Number of pages | 8 |
| Journal | Tropical Animal Health and Production |
| Volume | 36 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2004 |
Fingerprint
Keywords
- blood chemistry
- dairy cows
- heat stress
- milk production
- rectal temperature
- respiratory rate
ASJC Scopus subject areas
- Immunology
- Animal Science and Zoology
- veterinary(all)
Cite this
Effect of heat stress on milk production, rectal temperature, respiratory rate and blood chemistry in Holstein, Jersey and Australian milking Zebu cows. / Srikandakumar, A.; Johnson, E. H.
In: Tropical Animal Health and Production, Vol. 36, No. 7, 2004, p. 685-692.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of heat stress on milk production, rectal temperature, respiratory rate and blood chemistry in Holstein, Jersey and Australian milking Zebu cows
AU - Srikandakumar, A.
AU - Johnson, E. H.
PY - 2004
Y1 - 2004
N2 - The effect of heat stress on changes in milk production, rectal temperature, respiratory rate and blood chemistry was evaluated in three groups of six mature Holstein, Jersey and Australian Milking Zebu (AMZ) dairy cows. These animals were subjected to a cool environment when the mean temperature-humidity index (THI) was 72±1.4 (dry bulb temperature of 22.2-24.4°C and relative humidity of 100-60%) during the month of December. This experiment was repeated during the hotter month of July of the following year, when the mean THI was 93±3.1 (dry bulb temperature of 35.6-43.9°C and relative humidity 95-35%). Holstein cows produced more (p2 (kPa), bicarbonate (HCO 3 -, mmol/L), base excess (BE, mmol/L) and plasma chloride (Cl -, mmol/L) in all three breeds. The total haemoglobin (THb, g/dl) was elevated (p2SAT, %) in Jersey and AMZ cows but lowered it (p2 (kPa) in Holstein and Jersey cows but lowered it (p
AB - The effect of heat stress on changes in milk production, rectal temperature, respiratory rate and blood chemistry was evaluated in three groups of six mature Holstein, Jersey and Australian Milking Zebu (AMZ) dairy cows. These animals were subjected to a cool environment when the mean temperature-humidity index (THI) was 72±1.4 (dry bulb temperature of 22.2-24.4°C and relative humidity of 100-60%) during the month of December. This experiment was repeated during the hotter month of July of the following year, when the mean THI was 93±3.1 (dry bulb temperature of 35.6-43.9°C and relative humidity 95-35%). Holstein cows produced more (p2 (kPa), bicarbonate (HCO 3 -, mmol/L), base excess (BE, mmol/L) and plasma chloride (Cl -, mmol/L) in all three breeds. The total haemoglobin (THb, g/dl) was elevated (p2SAT, %) in Jersey and AMZ cows but lowered it (p2 (kPa) in Holstein and Jersey cows but lowered it (p
KW - blood chemistry
KW - dairy cows
KW - heat stress
KW - milk production
KW - rectal temperature
KW - respiratory rate
UR - http://www.scopus.com/inward/record.url?scp=4644259705&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=4644259705&partnerID=8YFLogxK
U2 - 10.1023/B:TROP.0000042868.76914.a9
DO - 10.1023/B:TROP.0000042868.76914.a9
M3 - Article
C2 - 15563029
AN - SCOPUS:4644259705
VL - 36
SP - 685
EP - 692
JO - Tropical Animal Health and Production
JF - Tropical Animal Health and Production
SN - 0049-4747
IS - 7
ER -