Identification of critical heat stress zone for energy corrected milk yield in Murrah buffaloes using temperature humidity index under subtropical climatic conditions

RAJALAXMI BEHERA; A K CHAKRAVARTY; ADHIKARI SAHU; NEERAJ KASHYAP; SAROJ RAI; SOUMYA DASH; ARPAN UPADHYAYA; AVTAR SINGH; A K GUPTA

doi:10.56093/ijans.v88i7.81478

Authors

RAJALAXMI BEHERA Scientist, ICAR-National Dairy Research Institute, Karnal, Haryana 132 001 India
A K CHAKRAVARTY Head and Principal Scientist, Animal Genetics and Breeding Division, ICAR-National Dairy Research Institute, Karnal, Haryana 132 001 India
ADHIKARI SAHU Teaching Associate, Ranchi Veterinary College, Kanke, Ranchi, Jharkhand
NEERAJ KASHYAP Assistant Professor, Department of Animal Genetics and Breeding, GADVASU, Ludhiana
SAROJ RAI Scientist, ICAR-National Dairy Research Institute, Karnal, Haryana 132 001 India
SOUMYA DASH Ph.D Scholar, ICAR-National Dairy Research Institute, Karnal, Haryana 132 001 India
ARPAN UPADHYAYA Ph.D Scholar, ICAR-National Dairy Research Institute, Karnal, Haryana 132 001 India
AVTAR SINGH Retired Principal Scientist, ICAR-National Dairy Research Institute, Karnal, Haryana
A K GUPTA Principal Scientist, ICAR-National Dairy Research Institute, Karnal, Haryana

https://doi.org/10.56093/ijans.v88i7.81478

Keywords:

Critical heat stress zone, Energy corrected milk yield, Murrah buffalo, Temperature humidity index

Abstract

The present study was conducted to identify the critical heat stress zone (CHSZ) in a year for energy corrected milk yield (ECMY) of Murrah buffaloes. Monthly test day fat percentage data on 734 Murrah buffaloes spread over 20 years (March 1994 to 2013) were collected from ICAR-National Dairy Research Institute, Karnal and climatic parameters, viz. dry bulb temperature, wet bulb temperature and relative humidity for corresponding periods were collected from ICAR-CSSRI, Karnal. The overall least-squares means for monthly test day fat % ranged from 7.58±0.04 in TD2 to 8.02±0.04 in TD9. The monthly test day fat % data was adjusted for the significant non-genetic factors and was used to estimate ECMY (Kcal/kg). The non-heat stress zone (October–March) and heat stress zone (April–September) were identified based on the trend of monthly average test day ECMY in relation to monthly average THI. Within the heat stress zone, July to September exhibited maximum decline in the trait and was empirically identified as the CHSZ. Regression of monthly average ECMY (Kcal/kg) on monthly average THI in the empirically identified CHSZ was carried out to identify the most CHSZ. During July and August, maximum decrease (–8.18) in monthly average ECMY (Kcal/kg) was observed per unit rise in THI. Therefore, July and August months were identified as CHSZ for ECMY in Murrah buffaloes under subtropical climatic condition. Hence, heat stress amelioration programmes should be undertaken during the period to improve ECMY in Murrah buffaloes.

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References

Basic Animal Husbandry Statistics. 2015. Ministry of Agriculture and Farmers Welfare, Department of Animal Husbandry, Dairying and Fisheries, New Delhi, Government of India.

Chitra A. 2015. ‘Genetic evaluation of milk and milk constituents in Murrah buffaloes.’ M.V.Sc. Thesis, National Dairy Research Institute (Deemed University), Karnal, Haryana, India.

Dash S. 2013. ‘Genetic evaluation of fertility traits in relation to heat stress in Murrah buffaloes.’ M.V.Sc. Thesis, NDRI (Deemed University), Karnal, Haryana, India.

DAHDF. 2017. Annual Report 2016–17. Department of Animal Husbandry, Dairying and Fisheries, Ministry of Agriculture and Farmers Welfare, Government of India.

Draper N R and Smith H. 1982. Applied regression analysis. John Willey and Sons, Inc., New York.

FAOSTAT. 2013. Food and Agriculture Organization of the United Nations, Rome, Italy.

Harvey W R. 1990. Guide for LSMLMW, PC-1 Version, mixed model least squares and maximum likelihood computer programme. Mimeograph Ohio State University, USA.

Kramer C Y. 1957. Extension of multiple range tests to group correlated adjusted means. Biometrics 13: 13–18. DOI: https://doi.org/10.2307/3001898

LCI. 1970. Patterns of transit losses. Livestock Conservation, Inc., Omaha, NE.

Moran J. 2005. Tropical dairy farming: feeding management for small holder dairy farms in the humid tropics. Colling Wood, Landlinks Press. p. 312. DOI: https://doi.org/10.1071/9780643093133

National Research Council. 1971. A guide to environmental research on animals. National Academy of Sciences, Washington, DC.

Overmann O R and Sanmann F P. 1927. Valeur du lait en calories. Le Lait 7: 149–61. DOI: https://doi.org/10.1051/lait:19276211

Pawar H N, Kumar R and Narang R. 2012. Effect of year, season and parity on milk production traits in Murrah buffaloes. Journal of Buffalo Science 1: 122–25. DOI: https://doi.org/10.6000/1927-520X.2012.01.01.22

Thom E C. 1959. The discomfort index. Weatherwise 12: 57–59. DOI: https://doi.org/10.1080/00431672.1959.9926960

Upadhyay R C, Ashutosh, Rani R, Singh S V, Mohanty T K and Gohain M. 2012. Impact of climate change on reproductive functions of Murrah buffaloes. Journal of Animal and Plant Sciences 22(3): 234–36.