The effect of heat stress on P, Ca, Mg and bone metabolism of dairy cows in periparturient period
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- KAMIYA Yuko
- <I>National Agricultural Research Center for Kyushu Okinawa Region</I>
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- KAMIYA Mitsuru
- <I>National Agricultural Research Center for Kyushu Okinawa Region</I>
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- TANAKA Masahito
- <I>National Agricultural Research Center for Kyushu Okinawa Region</I>
Bibliographic Information
- Other Title
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- 暑熱環境が周産期における乳牛のP,Ca,Mgおよび骨代謝に及ぼす影響
Description
The objective of this experiment was to study the effect of heat stress on P, Ca, Mg and bone metabolism of dairy cow around the time of parturition or during early lactation. Experiment 1: Three Holsteins due to calve under ambient moderate temperature and three Holsteins due to calve under high ambient temperature were used in this experiment. The experiment was performed from 7 days before the expected calving date to 4 days after parturition. The DMI of dairy cows calved under high ambient temperature significantly (P<0.05) decreased than that under moderate ambient temperature. The heat stress did not have apparent effects on milk yield and composition. Plasma concentration of Mg and osteocalcin (OC) of cows calved under high ambient temperature was significantly lower (P<0.05) than those under moderate ambient temperature. Experiment 2 : Three Holsteins calved under moderate ambient temperature and five Holsteins calved under high ambient temperature were used in this experiment. The experiment was performed from 4 or 5 days after parturition to 28 days after parturition. The DMI, milk yield and milk Mg concentration of dairy cows calved under high ambient temperature were significantly (P<0.05) lower than those under moderate ambient temperature. The concentrations of plasma Mg and OC of cows calved under high ambient temperature were significantly (P<0.05) lower that those under moderate ambient temperature. These results suggest that heat stress adversely affect on mineral and bone metabolism of dairy cows in the periparturient period.
Journal
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- The West Japan Journal of Animal Science
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The West Japan Journal of Animal Science 49 25-30, 2006
Warm Regional Society of Animal Science, Japan
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Details 詳細情報について
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- CRID
- 1390282679419162112
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- NII Article ID
- 130004068752
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- ISSN
- 18846394
- 09143459
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed