- Volume 28 Issue 7
DOI QR Code
Influence of Temperature and Humidity on Pregnancy Rate of Murrah Buffaloes under Subtropical Climate
- Dash, Soumya ;
- Chakravarty, A.K. ;
- Sah, V. ;
- Jamuna, V. ;
- Behera, R. ;
- Kashyap, N. ;
- Deshmukh, B.
- Received : 2014.10.22
- Accepted : 2015.01.26
- Published : 2015.07.01
Heat stress has adverse effects on fertility of dairy animals. Decline in fertility is linearly associated with an increase in combination of both temperature and humidity. The purpose of this study was to investigate the relationship between temperature humidity index (THI) and the pregnancy rate of Murrah buffaloes in a subtropical climate. The effects of genetic and non-genetic factors viz., sire, parity, period of calving and age group at first calving were found non-significant on pregnancy rate. The effect of THI was found significant (p<0.001) on pregnancy rate of Murrah buffaloes calved for first time and overall pregnancy rate. The threshold THI affecting the pregnancy rate was identified as THI 75. The months from October to March showed THI<75 and considered as non heat stress zone (NHSZ), while months from April to September were determined as heat stress zone (HSZ) with
Pregnancy Rate;Threshold Temperature Humidity Index;Non Heat Stress Zone;Heat Stress Zone;Critical Heat Stress Zone;Murrah Buffaloes
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