The effect of seasonal thermal stress on milk production and milk compositions of Korean Holstein and Jersey cows
2
조회
0
다운로드
3
인용
0
참고문헌
키워드
초록
Objective: In this study we investigated the effect of seasonal thermal stress on milk production and milk compositions between Holstein and Jersey dairy cows under the temperateclimate in Korea.Methods: A total of 9 Holstein lactating dairy cows (2.0±0.11 parity) which had a daily milk yield of 29.77±0.45 kg, and days in milk of 111.2±10.29 were selected similarly at the beginning of the experiments in each season. Also, a total of 9 Jersey lactating dairy cows (1.7±0.12 parity) which had a daily milk yield of 20.01±0.43 kg, and days in milk of 114.0±9.74 were selected similarly at the beginning of the experiments.Results: Results showed that the average ambient temperature (°C) and temperature-humidity index (THI) were higher in summer, and were lower in winter (p<0.05). The average relative humidity (RH, %) was higher in autumn than that of other seasons (p<0.05). Milk production was significantly decreased (Holstein 29.02 kg/d and Jersey 19.75 kg/d) in autumn than in other seasons (Holstein 30.14 kg/d and Jersey 20.96 kg/d). However, the milk production was negatively correlated in Holstein cows, and positively correlated in Jersey cows with THI values increased from 16 to 80. In addition, milk yield was increased by 15% in Holstein cows and decreased by 11% in Jersey cows with the THI values increased from 16 to 20. The fat and protein content percentage was significantly higher in Jersey milk than in Holstein milk, furthermore the fat and protein content yield was higher in Jersey cow milk than that of Holstein cow’s milk with all THIs.Conclusion: From the study results, we concluded that Jersey cows might be less adaptable to low temperature of the winter, and this would have a negative impact on dairy farmer income since Korea’s milk price estimation system places a higher value on milk yield than on milk compositions or sanitary grades.
Abstract
Objective: In this study we investigated the effect of seasonal thermal stress on milk production and milk compositions between Holstein and Jersey dairy cows under the temperateclimate in Korea. Methods: A total of 9 Holstein lactating dairy cows (2.0±0.11 parity) which had a daily milk yield of 29.77±0.45 kg, and days in milk of 111.2±10.29 were selected similarly at the beginning of the experiments in each season. Also, a total of 9 Jersey lactating dairy cows (1.7±0.12 parity) which had a daily milk yield of 20.01±0.43 kg, and days in milk of 114.0± 9.74 were selected similarly at the beginning of the experiments. Results: Results showed that the average ambient temperature (°C) and temperature-humidity index (THI) were higher in summer, and were lower in winter (p<0.05). The average relative humidity (RH, %) was higher in autumn than that of other seasons (p<0.05). Milk production was significantly decreased (Holstein 29.02 kg/d and Jersey 19.75 kg/d) in autumn than in other seasons (Holstein 30.14 kg/d and Jersey 20.96 kg/d). However, the milk production was negatively correlated in Holstein cows, and positively correlated in Jersey cows with THI values increased from 16 to 80. In addition, milk yield was increased by 15% in Holstein cows and decreased by 11% in Jersey cows with the THI values increased from 16 to 20. The fat and protein content percentage was significantly higher in Jersey milk than in Holstein milk, furthermore the fat and protein content yield was higher in Jersey cow milk than that of Holstein cow’s milk with all THIs. Conclusion: From the study results, we concluded that Jersey cows might be less adaptable to low temperature of the winter, and this would have a negative impact on dairy farmer income since Korea’s milk price estimation system places a higher value on milk yield than on milk compositions or sanitary grades.
참고문헌 (23)
- Sejian V, "Climate change impact on livestock: adaptation and mitigation", pp.1~23 (2015), Springer
- Sang-Min Lee, "Heat Stress Changes over East Asia under 1.5° and 2.0°C Global Warming Targets", Journal of Climate, 31(7), pp.2819~2831 (2018), American Meteorological Society[DOI]
- Pragna P, "Heat stress and dairy cow: impact on both milk yield and composition", Int J Dairy Sci (2016)
- Bland JH, "Effect of blending Jersey and Holstein-Friesian milk on Cheddar cheese processing, composition, and quality", J Dairy Sci, 98, pp.1~8 (2015)[DOI]
- Jensen HB, "Distinct composition of bovine milk from Jersey and Holstein-Friesian cows with good, poor, or noncoagulation properties as reflected in protein genetic variants and isoforms", J Dairy Sci, 95, pp.6905~6917 (2012)[DOI]
- Collier RJ, "Shade management in subtropical environment for milk yield and composition in Holstein and Jersey cows", J Dairy Sci, 64, pp.844~849 (1981)[DOI]
- Mader TL, "Environmental factors influencing heat stress in feedlot cattle", J Anim Sci, 84, pp.712~719 (2006)[DOI]
- Fox DG, "Accounting for the effects of environment on the nutrient requirements of dairy cattle", J Dairy Sci, 81, pp.3085~3095 (1998)[DOI]
- Van Soeat PJ, "Carbohydrate methodology, metabolism, and nutritional implications in dairy cattle : Methods for dietary fiber, neutral detergent fiber, and nonstrarch polysaccharides in relation to animal nutrition", J Dairy Sci, 74, pp.3583~3597 (1991)[DOI]
- Greenhouse gas emissions from the dairy sector, "Food and Agriculture Organization of the United Nations", FAO, ~ (2010)
- Roenfeldt S, "You can’t afford to ignore heat stress", Dairy Herd Manag, 35, pp.6~12 (1998)
- West JW, "Effects of hot, humid weather on milk temperature, dry matter intake, and milk yield of lactating dairy cows", J Dairy Sci, 86, pp.232~242 (2003)[DOI]
- McDowell RE, "Effect of climate on performance of Holsteins in first lactation", J Dairy Sci, 59, pp.965~971 (1976)[DOI]
- Johnson HD, "Effect of various temperature-humidity combinations on milk production of Holstein cattle" (1962), University of Missouri
- Bohmanova J, "Temperature-humidity indices as indicators of milk production losses due to heat stress", J Dairy Sci, 90, pp.1947~1956 (2007)[DOI]
- Berman A, "Effects of body surface area estimates on predicted energy requirements and heat stress", J Dairy Sci, 86, pp.3605~3610 (2003)[DOI]
- MacDonald MA, "Effects of low fluctuating temperatures on farm animals : I. Influence of ambient air temperature on the respiration rate, heart rate, and rectal temperature of lactating Holstein-Friesian cows", Can J Anim Sci, 38, pp.10~22 (1958)[DOI]
- Young BA, "Ruminant cold stress : effect on production", J Anim Sci, 57, pp.1601~1607 (1983)[DOI]
- Kadzere CT, "Heat stress in lactating dairy cows : a review", Livest Prod Sci, 77, pp.5991~ (2002)[DOI]
- Webster AJF, "Heat loss from animals and man: assessment and control", pp.205~231 (1974), Butterworths
- Christopherson RJ, "Grazing research at northern latitudes", pp.247~257 (1986), Plenum Press
- Rodriquez LA, "Effects of relative humidity, maximum and minimum temperature, pregnancy, and stage of lactation on milk composition and yield", J Dairy Sci, 68, pp.973~978 (1985)[DOI]
- Bouraoui R, "The relationship of temperature-humidity index with milk production of dairy cows in a Mediterranean climate", Anim Res, 51, pp.479~491 (2002)[DOI]