Milk yield did not decrease in large herds of high-producing Holstein cows in semi-arid climate of Mexico
- 62 Downloads
This study aimed to determine the trends in milk production, fertility, temperature-humidity index (THI), and herd size in dairy herds from the Laguna region in northern Mexico. Records of 16 dairy herds of Holstein cows from January 2002 to December 2016 were used. Milk production was categorized in low and high levels. Milk production and fertility were analyzed using generalized equation estimation procedures by a model of repeated measures that included the effect of year, month, and productive level, an interaction for month × productive level, and herd effect was nested in productive level. For THI, a generalized linear model that included the effects of year and month was used. Dairy herds with high levels of milk production yielded more milk than those with low levels (P < 0.001). Milk production in 2002 and 2016 was 27.4 ± 0.6 and 32.3 ± 0.7 L/cow/day, respectively. Fertility fluctuated throughout the study. Dairy herds with high levels of milk production recorded higher fertility than those with low levels (P < 0.001). From October to April, THI was < 70, whereas it was > 73 from May to September, indicating that cows were in heat stress (20 h/day). The median herd size was 995 and 2569 cows in 2002 and 2016, respectively. In conclusion, in large herds, milk production increased over the years of study, whereas fertility showed a wave cycle; nonetheless, when THI was > 73, both milk production and fertility decreased.
KeywordsDairy cattle Milk secretion Heat stress Temperature-humidity index Reproductive performance
The authors are grateful to data managers at farms for collecting records. We thank Catalina Fernández for their administrative support.
Compliance with ethical standards
Statement of animal rights
This article does not contain any studies with animals performed by any of the authors.
Conflict of interest
The authors declare that they have no conflict of interest.
- Castillo-Juarez, H., Oltenacu, P.A., Blake, R.W., Mcculloch, C.E., Cienfuegos-Rivas, E.G., 2000. Effect of herd environment on the genetic and phenotypic relationships among milk yield, conception rate, and somatic cell score in Holstein cattle. Journal of Dairy Science, 83, 807–814.CrossRefGoogle Scholar
- CONABIO, 2016. Comisión Nacional para el Conocimiento y uso de la Biodiversidad Mexicana. http://www.biodiversidad.gob.mx/ecosistemas/ecosismex.html. Accessed 4 Jun 2016
- Du Preez, J.H., 2000. Parameters for the determination and evaluation of heat stress in dairy cattle in South Africa. Onderstepoort Journal of Veterinary Research, 67, 263–271.Google Scholar
- INIFAP, 2017. Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias. Estación meteorológica del Campo Experimental La Laguna. http://clima.inifap.gob.mx/redinifap/est.aspx?est=26473. Accessed 4 Jul 2017
- IPCC, 2014. Intergovernmental Panel on Climate Change. Climate Change: Synthesis Report. Summary for Policymarkers 2014. https://www.ipcc.ch/pdf/assessment-report/ar5/syr/AR5_SYR_FINAL_All_Topics.pdf. Accessed 4 May 2017
- Ismael, A., Løvendahl, P., Strandberg, E., 2012. Environmental sensitivity in dairy cattle with focus on fertility traits. Proceedings of the AnGR-NordicNET Workshop, Genotype-by-Environment Interactions and Adaptation of Farm Animals on Phenotypic and Molecular Levels (Tuusula, Finland), 13.Google Scholar
- Key, N., Sneeringer, S., Marquardat, D., 2014. Climate change, heat stress, and U.S. dairy production, ERR-175, U.S. Department of Agriculture, Economic Research Service. https://ageconsearch.umn.edu/bitstream/186731/2/ERR175.pdf Accessed 15 Nov 2017
- López-López, A., Sánchez Crispín, A., 2010. Comarca Lagunera, procesos regionales en el contexto global. Universidad Nacional Autónoma de México. Instituto de Geografía. http://www.publicaciones.igg.unam.mx/index.php/ig/catalog/. Accessed 5 Jul 2017
- Lozano-Domínguez, R.R., Vázquez Peláez, C.G., González Padilla, E., 2005. Factores asociados del estrés calórico y producción de leche sobre la tasa de gestación en bovinos en sistemas intensivos. Técnica Pecuaria México, 43, 197–210.Google Scholar
- SIAP, SAGARPA, 2015. Servicio de Información Agroalimentaria y Pesquera, Secretaría de Agricultura Ganadería y Desarrollo Rural, Pesca y Alimentación. Bovino leche, población ganadera 2006–2015. https://www.gob.mx/cms/uploads/attachment/file/165998/bovlech.pdf. Accessed 8 Aug 2017
- SPSS. Inc. Released 2007. SPSS for windows, version 16.0: Chicago, SPSS Inc.Google Scholar