Effects of heat stress on milk yield of primiparous Holstein cows at regional scale using large data bases

  • Gabriela Silvia Cruz Facultad de Agronomia, Universidad de la Republica
  • Jorge I. Urioste Facultad de Agronomia, Universidad de la Republica
  • Celmira G. Saravia Facultad de Agronomia, Universidad de la Republica
Keywords: dairy cow, mixed models, summer heat, THI


With the prospects of global warming, heat stress, the depressive (summer) heat effect on milk yield, has become a high priority research problem in temperate zones. The effect of summer present day heat and lag heat effects on milk yield of first lactation grazing Holstein cows was assessed through the temperature and humidity index (THI). Additionally, THI thresholds were calculated. Daily air temperature and humidity data from three locations for six summer seasons (December-March in years 2001 – 2006) were used. Data of 35500 monthly test days from 8875 cows in 54 farms within the influence zones of the respective meteorological stations were analyzed. Mixed linear models were adjusted, considering the animal as random effect and location, farm, days in milking, age at calving, year of calving and THI as fixed effects. Four measures per animal were taken into account and modelled as repeated measures. A significant depressing heat effect on milk yield was found for the present day (THI) and also for one-day and two-days before (THI1 and THI2). Significant interactions between THI and days in milk, farm and year were found. The lag heat effects explained more variability on milk yield than the heat effect for the present day. Threshold THI-values were different depending on the considered day: 75, 75 and 72 were estimated for THI, THI1 and THI2, respectively. Heat stress caused a decrease in milk yield of 1.3%, 1.9%, and 0.9% of average daily production (per THI unit increase above threshold), depending on the THI measure used.


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Author Biography

Gabriela Silvia Cruz, Facultad de Agronomia, Universidad de la Republica
Prof. Agregada, Departamento de Sistemas Ambientales. Facultad de Agronomía, UdelaR. Uruguay


Aguilar I, Misztal I, Tsuruta S (2010) Short communication: Genetic trends of milk yield under heat stress for US Holsteins. J. Dairy Sci. 93:1754–1758

Barash H, Silanikove N, Shamay A, Ezra E (2001) Interrelationships among ambient temperature, day length and milk yield in dairy cows under a Mediterranean climate. J. Dairy Sci. 84:2314-2320

Baumgard L, Rhoads R (2013) Effects of heat stress on postabsorptive metabolism and energetics. Annu. Rev. Anim. Biosci. 1:7.1–7.27

Bohmanova J, Misztal I, Cole JB (2007) Temperature–Humidity Indices as indicators of milk production losses due to heat stress. J. Dairy Sci. 90:1947-1956

Bouaroui R, Lahamar M, Majduob A, Djemali M, Belyea R (2002) The relationship of temperature-humidity index with milk production of dairy cows in a Mediterranean climate. Anim. Res. 51 479-491

Collier RJ, Beede DK, Tactcher WW, Israel LA, Wilcox CJ (1982) Influences of environment and its modification on dairy animal health and production. J. Dairy Sci. 65:2213-2227

Collier RJ, Zimbelman RB (2007) Heat stress effects on cattle: what we know and what we don’t know. 22nd annual southwest nutrition and management conference. February, 22-23, 2007. Tempe, AZ 76 – 83

Cruz G, Urioste J I, (2009) Variabilidad temporal y espacial del Índice de Temperatura y Humedad (ITH) en zonas de producción lechera de Uruguay. Agrociencia, Vol. XIII, Nº 2, 37-46. http://www.fagro.edu.uy/~agrociencia/index.php/directorio/article/view/147/89

Cruz G, Saravia C (2008) Cuantificación de un Índice de Temperatura y Humedad en Uruguay. Agrociencia, Vol. XII, 56-60

Di Rienzo JA, Macchiavelli R, Casanoves F (2008) Modelos Mixtos en Infostat. Tutorial.

Hill DL, Wall E (2015) Dairy cattle in a temperate climate: the effects of weather on milk yield and composition depend on management. Animal, Vol. 9, Issue 01, 138-149.

Infostat. 2009. Programa Estadístico. Grupo Infostat FCA. Universidad Nacional de Córdoba. Argentina. Versión libre.

Hahn G L (1999) Dynamic Responses of Cattle to Thermal Heat Loads. J. Anim. Sci. Vol. 77, Suppl. 2/J. Dairy Sci. Vol. 82, Suppl. 2/1999

Hahn G L (2001) Biometeorology – based environmental management for livestock: decision making in the new millennium. Manuscript proposed for 3rd Brazilian congress of Biometeorology. Maringa, PR. 3 – 5 September, 2001

Ingraham RH, Johnson HD, Blecha F, Kelley KW, Hahn GL (1989) Acclimatization, chronic and acute exposure and reactions. C. 3. Hot weather stress. In: Animal Health and Production at extremes of weather. World Meteorological Organization (WMO) Nº 685. Technical Note Nº 191

Johnson HD, Kibler HH, Ragsdale AC, Berry IL, Shanklin MD (1961) Role of heat tolerance and production level of response of lactating Holstein to various temperature-humidity conditions. J. Dairy Sci. 44:1191

Johnson HD (1994) Animal physiology. In: John Griffiths (ED) Handbook of Agricultural Meteorology, New York pp 42-58

Kadzere C, Murphy M, Silanikove N, Maltz E (2002) Heat stress in lactating dairy cows: a review. Livestock Production Science. 77 (2002) 59-91

Lambertz C, Sanker C, Gauly, M (2014) Climatic effects on milk production traits and somatic cell score in lactating Holstein-Friesian cows in different housing systems. J. Dairy Sci. 97: 319 – 329.

Nardone A, Ronchi B, Lacetera N, Ranieri MS, Bernabucci U (2010) Effects of climate changes on animal production and sustainability of livestock systems. Livestock Science 130 (2010): 57-69

Nienaber JA, Hahn GL (2007) Livestock production system management responses to thermal challenges. Int. J. Biometeorol. (2007) 52:149-157

Prosser CL, Brown FA (1961) Comparative Animal Physiology. Philadelphia, 688 pp.

Ravagnolo O, Misztal I, Hoogenboom G (2000) Genetic component of heat stress in dairy cattle, development of heat index function. J. Dairy Sci. 83: 2120-2125

Román L, Saravia C, Astigarraga L, La Manna A (2014) Régimen agroclimático de olas de calor para La Estanzuela, Colonia, Uruguay. Disponible en: https://bit.ly/2VibK4i Access 1/29/2016

Saravia C, Cruz G (2006) Olas de calor en la cuenca lechera de Salto: evolución del ITH y comportamiento atmosférico que determinan su ocurrencia. 2006. Soc. Brás. Biometeorologia. www.sbbiomet.com.br/cbb/2006/Animal/ResumoIVCBB_031.pdf Access 4/30/2011

Saravia C, Cruz G, Franco J (2002) Cálculo del Índice de Temperatura y Humedad diario y su estimación a partir de un mínimo de registros. In: Congreso Argentino de Agrometeorología. Anales. AADA. Córdoba, Argentina

Sharma A K, Rodríguez LA, Mekonnen G, Wilcox CJ, Bachean KC, Collier R J (1983) Climatological and genetic effects on milk composition and yield. J. Dairy Sci. 66, 119-126

Silanikove N, Koluman N (2015) Impact of climate change on the dairy industry in temperate zones: Predications on the overall negative impact and on the positive role of dairy goats in adaptation to earth warming. Small Ruminant Research 123, 27–34

Travasso I, Olivera L, da Cunha GR, Cunha JM (2007) Evolución del clima observado durante el período 1931-2000 en la región Sureste de América del Sur. http://www.inia.org.uy/disciplinas/agroclima/publicaciones Acces 1/29/2015

Turner HG, Finch VA, Johnson HD, Ingraham RD, Mannathoko M, Ollerensaw CB, Hahn GL (1989) Hot weather stress. In Animal health and production at extremes of weather. Technical Note Nº 191. World Meteorological Organization - Nº 685. ISBN 92-63-10685-1

Valtorta S, Gallardo M (1996) El estrés por calor en producción lechera. In Instituto Nacional de Tecnología Agropecuaria. Argentina. Miscelánea Nº81. pp 173-185

West J W, Mullinix BG, Bernard J K (2003) Effects of hot, humid weather on milk temperature, dry matter intake, and milk yield of lactating dairy cows. J. Dairy Sci. 86:232-242

Wheelock JB, Rhoads RP, Van Baale MJ, Sanders SR, Baumgard LH (2010) Effects of heat stress on energetic metabolism in lactating Holstein cows. J. Dairy Sci. 93:644-655

World Meteorological Organization. 2004. Recommendations of Fourth Seminar for Homogenization and Quality Control in Climatological Databases. Budapest, Hungary. 6 – 10 October, 2003. WMO-TD Nº 1236. Geneva.

How to Cite
Cruz, Gabriela Silvia, Jorge I. Urioste, and Celmira G. Saravia. 2018. “Effects of Heat Stress on Milk Yield of Primiparous Holstein Cows at Regional Scale Using Large Data Bases”. Latin American Archives of Animal Production 26 (3-4). https://ojs.alpa.uy/index.php/ojs_files/article/view/2563.
Original paper