DOI QR코드

DOI QR Code

Effect of seasonal changes on fertility parameters of Holstein dairy cows in subtropical climate of Taiwan

  • Liu, Wen-Bor (Department of Animal Science, National Chung Hsing University) ;
  • Peh, Huo-Cheng (Department of Animal Science, National Chung Hsing University) ;
  • Wang, Chien-Kai (Department of Animal Science, National Chung Hsing University) ;
  • Mangwe, Mancoba Christopher (Department of Animal Science, National Chung Hsing University) ;
  • Chen, Chih-Feng (Department of Animal Science, National Chung Hsing University) ;
  • Chiang, Hsin-I (Department of Animal Science, National Chung Hsing University)
  • Received : 2017.04.18
  • Accepted : 2017.09.11
  • Published : 2018.06.01

Abstract

Objective: The purpose of this retrospective study was to investigate the relationship between temperature-humidity index (THI), season, and conception rate (CR) of Holstein cows in central Taiwan. Methods: The mean performance and number of observations were statistically evaluated for various parameters, including age at first service, number of days open, gestation length, CR, and calving interval for different parities. Results: The results indicate that the mean age at first service was 493.2 days; the gestation length was similar across all cows of different parities, ranging from 275.1 to 280.7 days. The overall CR of all inseminations was significantly lower in multiparous cows ($47.26%{\pm}0.22%$) than in heifers ($57.14%{\pm}0.11%$) (p<0.05). At THI>72 and during the hot season (from June to November), CRs for multiparous cows were significantly reduced compared to that for heifers, while the ratio remained unchanged among heifers for all seasons. Conclusion: To achieve a high CR, lactating cows should be bred in winter and spring (from December to May) from the start of the seasonal breeding program, whereas the heifer should be allowed to breed in summer and fall under the subtropical climate in Taiwan.

Keywords

Calving Interval;Dairy Cow;Fertility;Temperature-humidity Index;Heat Stress

References

  1. Rensis FDI, Garcia-Ispierto I, Lopez-Gatius F. Seasonal heat stress: clinical implications and hormone treatments for the fertility of dairy cows. Theriogenology 2015;84:659-66. https://doi.org/10.1016/j.theriogenology.2015.04.021
  2. Kadzere CT, Murphy MR, Silanikove N, Maltz E. Heat stress in lactating dairy cows: a review. Livest Prod Sci 2002;77:59-91. https://doi.org/10.1016/S0301-6226(01)00330-X
  3. Hansen PJ, Drost MR, Rivera RM, et al. Adverse impact of heat stress on embryo production: causes and strategies for mitigation. Theriogenology 2001;55:91-103. https://doi.org/10.1016/S0093-691X(00)00448-9
  4. Sartori R, Sartor-Bergfelt R, Mertens SA, et al. Fertilization and early embryonic development in heifers and lactating cows in summer and lactating and dry cows in winter. J Dairy Sci 2002;85:2803-12. https://doi.org/10.3168/jds.S0022-0302(02)74367-1
  5. Schuller LK, Burfeind O, Heuwieser W. Impact of heat stress on conception rate of dairy cows in the moderate climate considering different temperature-humidity index thresholds, periods relative to breeding, and heat load indices. Theriogenology 2014;81:1050-7. https://doi.org/10.1016/j.theriogenology.2014.01.029
  6. Allen JD, Hall LW, Collier RJ, Smith JF. Effect of core body temperature, time of day, and climate conditions on behavioral patterns of lactating dairy cows experiencing mild to moderate heat stress. J Dairy Sci 2015;98:118-27. https://doi.org/10.3168/jds.2013-7704
  7. Cooke JS, Cheng Z, Bourne NE, Wathes DC. Association between growth rates, age at first calving and subsequent fertility, milk production and survival in Holstein-Friesian heifers. Open J Anim Sci 2013;3:1-12.
  8. Zavadilova L., Stipkova M. Effect of age at first calving on longevity and fertility traits for Holstein cattle. Czech J Anim Sci 2013;58:47-57. https://doi.org/10.17221/6614-CJAS
  9. Duplessis M, Cue RI, Santschi DE, Lefebvre DM, Lacroix R. Weight, height, and relative-reliability indicators as a management tool for reducing age at first breeding and calving of dairy heifers. J Dairy Sci 2015;98:2063-73. https://doi.org/10.3168/jds.2014-8279
  10. Norman HD, Wright JR, Kuhn MT, et al. Genetic and environmental factors that affect gestation length in dairy cattle. J Dairy Sci 2009;92:2259-69. https://doi.org/10.3168/jds.2007-0982
  11. Ferreira RM, Ayres H, Chiaratti MR, et al. The low fertility of repeat-breeder cows during summer heat stress is related to a low oocyte competence to develop into blastocysts. J Dairy Sci 2011;94:2383-92. https://doi.org/10.3168/jds.2010-3904
  12. Rocha A, Randel RD, Broussard JR, et al. High environmental temperature and humidity decrease oocyte quality in Bos taurus but not in Bos indicus cows. Theriogenology 1998;49:657-65. https://doi.org/10.1016/S0093-691X(98)00016-8
  13. Armstrong DV. Heat stress interaction with shade and cooling. J Dairy Sci 1994;77:2044-50. https://doi.org/10.3168/jds.S0022-0302(94)77149-6
  14. Berman A. Extending the potential of evaporative cooling for heat-stress relief. J Dairy Sci 2006;89: 3817-25. https://doi.org/10.3168/jds.S0022-0302(06)72423-7
  15. Shiao TF, Chen JC, Yang DW, et al. Feasibility assessment of a tunnel-ventilated, water-padded barn on alleviation of heat stress for lactating Holstein cows in a humid area. J Dairy Sci 2011; 94:5393-404. https://doi.org/10.3168/jds.2010-3730
  16. Morton JM, Tranter WP, Mayer DG, Jonsson NN. Effects of environmental heat on conception rates in lactating dairy cows: Critical periods of exposure. J Dairy Sci 2007;90:2271-8. https://doi.org/10.3168/jds.2006-574
  17. Liu WB, Chung ST, Shyu CL, et al. Strategy for the treatment of puerperal metritis and improvement of reproductive efficiency in cows with retained placenta. Acta Vet Hung 2011;59: 247-56. https://doi.org/10.1556/AVet.2011.004
  18. NRC. Nutrient requirements of dairy cattle. 7th rev. ed. Washington, DC, USA: National Academy Press; 2001.