タイトル |
妊娠末期乳牛のカルシウム代謝に及ぼす産次の影響 |
担当機関 |
鹿児島県畜試 |
研究期間 |
2000~2004 |
研究担当者 |
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発行年度 |
2003 |
要約 |
乳牛の妊娠末期における骨代謝活動の様相が産次間で異なり産次とともに低カルシウム血症発症の危険性が高まる傾向にある。特に3産以上についてミネラルバランスを考慮した飼料給与,陰イオン添加量の調整やカルシウムの添加を行う等カルシウム代謝を高める妊娠末期の飼養管理が必要である。
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キーワード |
乳牛、妊娠末期、カルシウム、高カリウム、陰イオン添加剤
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背景・ねらい |
ふん尿等の過剰な土地還元・施用に伴う給与飼料からの過剰なカリウム(K)の摂取は乳牛の周産期における代謝病の増加の原因の一つとなっている。そこで、各種代謝病の発生を抑制しつつ効率的な乳生産を確立するため、カリウムの過剰摂取に伴う対策としてのカチオンアニオンバランス(DCAD)の効果と分娩直後のカルシウム代謝に及ぼす産次の影響について併せて検討し、分娩前のバランスのとれたミネラル給与方法を明らかにする。
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成果の内容・特徴 |
- 高K飼料摂取乳牛への塩化マグネシウム(MgCl2)添加により尿pHは、低下傾向を示した。尿pHの推移に産次間の差は認められない(図1)。
- 血中カルシウム(Ca)濃度は分娩直後から24時間後間で最も低下する。また,3産次以上においては分娩直後から24時間後間に血中Ca濃度の低下傾向がみられる(図2)。
- 血中副甲状腺ホルモン(PTH)濃度は分娩直前から上昇する傾向がみられ、3産次以降においては血中Ca濃度を保つため、高い濃度上昇がみられる(図3)。
- 血中骨型アルカリフォスファターゼ(BAP)濃度は高産次において分娩後の骨形成に高い濃度が必要であったと推察される(図4)。
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成果の活用面・留意点 |
- 3産以上については、特にミネラルバランスを考慮した飼料給与、陰イオン添加量の調整やカルシウムの添加を行う等カルシウム代謝を高める妊娠末期の飼養管理を行う必要がある。
- 比較的容易に測定でき、産次間の影響も少ない尿pHはミネラル代謝改善に必要なDCAD値レベルの判定に有用である。
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図表1 |
![222397-1.jpg](https://s3-agre-content.s3.ap-northeast-1.amazonaws.com/assets/images/seika_chart/222397-1.jpg?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEHcaDmFwLW5vcnRoZWFzdC0xIkcwRQIhAJqN3H%2FfNnu6SzksAn4Xixb7%2Bq9JXkgVRTbO%2BQpwPiuzAiAqgbuedBeZ94cgn8AeCda0ml7m93xOa92Vh%2FV%2F052OSSqQBAgwEAIaDDUzMjMzMTA3MjA0MSIMAXFQK8WZklemKd0pKu0DaOlHzPjMw7EFxzx8MI3fsMluzt1kKx%2BZ5vlZ%2FEbSLNFlQBrRq88eRY%2B69YYZA%2B7IGEVnwYeAzPCBK8ty8xGJZOkTAWKltwyVNoY1Zg8YsXnQYvHFai6JPeq%2BInJNRJ9yx3rQqeV1%2FQ5KNZhid%2BD2AEPW0GwJ0FHD6e1jb1ptGHILlcifJxwFOlPdDA%2Fdm8oJAQzZ0Sjuz0E0n%2F4Y72DjV8zalEdKB0%2BqQSFaAxdo%2BX3lqordi3P5ankAb6AUo9IZW8BXij1zjhVFTzGi7XqLFv6Bkqwp3oQJBOUW279O5huF9VtSVgrXuCFc%2BgwCIZ%2FVN3KtW86JZQCgEFA%2BdlbGllo3By23dEhHOUsn2AqQ7yRxqe3hntUDhvJJSamc0jRKLPhSNfhJ6C6bLDFhGevi5eFGJ3jISVyuKWDKboI2nfosMV8PBzqGdNnTfRhZUCfMAancSrgUhR6nlJdBM0PgdNo2tdTFEVlXH69rCBVXIEZbtWlYln6iL44qzpO1IFfKCUvgJHsvUCFyO%2FpOLN1QSCoFrOduxWKAPnrS6oFIEy5eZ90xi2K5xMs80NyKQn9nMo2Al9Ks0KLWTRoLLMluCnJok24TifG5gV0aNmRblPfAQeiXQaJ7k9n%2F4IAfBiiajLb2SjEpgm1V2oS7JjD2yYC0BjqmAZcm0%2F%2Fdquuwi7Lla1xuFrQ2fGoJBDjK6CsZq%2FKvVy3pEVRWJd7Hbp68xLgBXFagiDOq72Nwi00BVJLyGn5%2BUJc6tGINivLpHdLjXTlmusYc5xqte2IjMSZSXtEuVRI8PZOa85pAaxRAMzqelI4PsZTWyDNhK0OTfKYskP23dcEG%2FNIhQkmcJnlvvjqdZI%2Fn7JWPQJ70fVULoXzVLGimU3YiduIhY9E%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAXX4LHRIU7ZDGVTZF%2F20240629%2Fap-northeast-1%2Fs3%2Faws4_request&X-Amz-Date=20240629T152317Z&X-Amz-SignedHeaders=host&X-Amz-Expires=1800&X-Amz-Signature=bbe769140b07a460cb144d0ebfab6a7750bd051afec1147d404a4f12bb834021) |
図表2 |
![222397-2.jpg](https://s3-agre-content.s3.ap-northeast-1.amazonaws.com/assets/images/seika_chart/222397-2.jpg?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEHcaDmFwLW5vcnRoZWFzdC0xIkcwRQIhAJqN3H%2FfNnu6SzksAn4Xixb7%2Bq9JXkgVRTbO%2BQpwPiuzAiAqgbuedBeZ94cgn8AeCda0ml7m93xOa92Vh%2FV%2F052OSSqQBAgwEAIaDDUzMjMzMTA3MjA0MSIMAXFQK8WZklemKd0pKu0DaOlHzPjMw7EFxzx8MI3fsMluzt1kKx%2BZ5vlZ%2FEbSLNFlQBrRq88eRY%2B69YYZA%2B7IGEVnwYeAzPCBK8ty8xGJZOkTAWKltwyVNoY1Zg8YsXnQYvHFai6JPeq%2BInJNRJ9yx3rQqeV1%2FQ5KNZhid%2BD2AEPW0GwJ0FHD6e1jb1ptGHILlcifJxwFOlPdDA%2Fdm8oJAQzZ0Sjuz0E0n%2F4Y72DjV8zalEdKB0%2BqQSFaAxdo%2BX3lqordi3P5ankAb6AUo9IZW8BXij1zjhVFTzGi7XqLFv6Bkqwp3oQJBOUW279O5huF9VtSVgrXuCFc%2BgwCIZ%2FVN3KtW86JZQCgEFA%2BdlbGllo3By23dEhHOUsn2AqQ7yRxqe3hntUDhvJJSamc0jRKLPhSNfhJ6C6bLDFhGevi5eFGJ3jISVyuKWDKboI2nfosMV8PBzqGdNnTfRhZUCfMAancSrgUhR6nlJdBM0PgdNo2tdTFEVlXH69rCBVXIEZbtWlYln6iL44qzpO1IFfKCUvgJHsvUCFyO%2FpOLN1QSCoFrOduxWKAPnrS6oFIEy5eZ90xi2K5xMs80NyKQn9nMo2Al9Ks0KLWTRoLLMluCnJok24TifG5gV0aNmRblPfAQeiXQaJ7k9n%2F4IAfBiiajLb2SjEpgm1V2oS7JjD2yYC0BjqmAZcm0%2F%2Fdquuwi7Lla1xuFrQ2fGoJBDjK6CsZq%2FKvVy3pEVRWJd7Hbp68xLgBXFagiDOq72Nwi00BVJLyGn5%2BUJc6tGINivLpHdLjXTlmusYc5xqte2IjMSZSXtEuVRI8PZOa85pAaxRAMzqelI4PsZTWyDNhK0OTfKYskP23dcEG%2FNIhQkmcJnlvvjqdZI%2Fn7JWPQJ70fVULoXzVLGimU3YiduIhY9E%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAXX4LHRIU7ZDGVTZF%2F20240629%2Fap-northeast-1%2Fs3%2Faws4_request&X-Amz-Date=20240629T152317Z&X-Amz-SignedHeaders=host&X-Amz-Expires=1800&X-Amz-Signature=3e4ea46cf0e4e6fadff873cfbda0264d69a437da7d9398e42a3d8c6eb0041a08) |
図表3 |
![222397-3.jpg](https://s3-agre-content.s3.ap-northeast-1.amazonaws.com/assets/images/seika_chart/222397-3.jpg?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEHcaDmFwLW5vcnRoZWFzdC0xIkcwRQIhAJqN3H%2FfNnu6SzksAn4Xixb7%2Bq9JXkgVRTbO%2BQpwPiuzAiAqgbuedBeZ94cgn8AeCda0ml7m93xOa92Vh%2FV%2F052OSSqQBAgwEAIaDDUzMjMzMTA3MjA0MSIMAXFQK8WZklemKd0pKu0DaOlHzPjMw7EFxzx8MI3fsMluzt1kKx%2BZ5vlZ%2FEbSLNFlQBrRq88eRY%2B69YYZA%2B7IGEVnwYeAzPCBK8ty8xGJZOkTAWKltwyVNoY1Zg8YsXnQYvHFai6JPeq%2BInJNRJ9yx3rQqeV1%2FQ5KNZhid%2BD2AEPW0GwJ0FHD6e1jb1ptGHILlcifJxwFOlPdDA%2Fdm8oJAQzZ0Sjuz0E0n%2F4Y72DjV8zalEdKB0%2BqQSFaAxdo%2BX3lqordi3P5ankAb6AUo9IZW8BXij1zjhVFTzGi7XqLFv6Bkqwp3oQJBOUW279O5huF9VtSVgrXuCFc%2BgwCIZ%2FVN3KtW86JZQCgEFA%2BdlbGllo3By23dEhHOUsn2AqQ7yRxqe3hntUDhvJJSamc0jRKLPhSNfhJ6C6bLDFhGevi5eFGJ3jISVyuKWDKboI2nfosMV8PBzqGdNnTfRhZUCfMAancSrgUhR6nlJdBM0PgdNo2tdTFEVlXH69rCBVXIEZbtWlYln6iL44qzpO1IFfKCUvgJHsvUCFyO%2FpOLN1QSCoFrOduxWKAPnrS6oFIEy5eZ90xi2K5xMs80NyKQn9nMo2Al9Ks0KLWTRoLLMluCnJok24TifG5gV0aNmRblPfAQeiXQaJ7k9n%2F4IAfBiiajLb2SjEpgm1V2oS7JjD2yYC0BjqmAZcm0%2F%2Fdquuwi7Lla1xuFrQ2fGoJBDjK6CsZq%2FKvVy3pEVRWJd7Hbp68xLgBXFagiDOq72Nwi00BVJLyGn5%2BUJc6tGINivLpHdLjXTlmusYc5xqte2IjMSZSXtEuVRI8PZOa85pAaxRAMzqelI4PsZTWyDNhK0OTfKYskP23dcEG%2FNIhQkmcJnlvvjqdZI%2Fn7JWPQJ70fVULoXzVLGimU3YiduIhY9E%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAXX4LHRIU7ZDGVTZF%2F20240629%2Fap-northeast-1%2Fs3%2Faws4_request&X-Amz-Date=20240629T152317Z&X-Amz-SignedHeaders=host&X-Amz-Expires=1800&X-Amz-Signature=623504b6dec8e22a93b0039cc1165c9ffaf8f90f5425d5c3af46f518473d3629) |
図表4 |
![222397-4.jpg](https://s3-agre-content.s3.ap-northeast-1.amazonaws.com/assets/images/seika_chart/222397-4.jpg?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEHcaDmFwLW5vcnRoZWFzdC0xIkcwRQIhAJqN3H%2FfNnu6SzksAn4Xixb7%2Bq9JXkgVRTbO%2BQpwPiuzAiAqgbuedBeZ94cgn8AeCda0ml7m93xOa92Vh%2FV%2F052OSSqQBAgwEAIaDDUzMjMzMTA3MjA0MSIMAXFQK8WZklemKd0pKu0DaOlHzPjMw7EFxzx8MI3fsMluzt1kKx%2BZ5vlZ%2FEbSLNFlQBrRq88eRY%2B69YYZA%2B7IGEVnwYeAzPCBK8ty8xGJZOkTAWKltwyVNoY1Zg8YsXnQYvHFai6JPeq%2BInJNRJ9yx3rQqeV1%2FQ5KNZhid%2BD2AEPW0GwJ0FHD6e1jb1ptGHILlcifJxwFOlPdDA%2Fdm8oJAQzZ0Sjuz0E0n%2F4Y72DjV8zalEdKB0%2BqQSFaAxdo%2BX3lqordi3P5ankAb6AUo9IZW8BXij1zjhVFTzGi7XqLFv6Bkqwp3oQJBOUW279O5huF9VtSVgrXuCFc%2BgwCIZ%2FVN3KtW86JZQCgEFA%2BdlbGllo3By23dEhHOUsn2AqQ7yRxqe3hntUDhvJJSamc0jRKLPhSNfhJ6C6bLDFhGevi5eFGJ3jISVyuKWDKboI2nfosMV8PBzqGdNnTfRhZUCfMAancSrgUhR6nlJdBM0PgdNo2tdTFEVlXH69rCBVXIEZbtWlYln6iL44qzpO1IFfKCUvgJHsvUCFyO%2FpOLN1QSCoFrOduxWKAPnrS6oFIEy5eZ90xi2K5xMs80NyKQn9nMo2Al9Ks0KLWTRoLLMluCnJok24TifG5gV0aNmRblPfAQeiXQaJ7k9n%2F4IAfBiiajLb2SjEpgm1V2oS7JjD2yYC0BjqmAZcm0%2F%2Fdquuwi7Lla1xuFrQ2fGoJBDjK6CsZq%2FKvVy3pEVRWJd7Hbp68xLgBXFagiDOq72Nwi00BVJLyGn5%2BUJc6tGINivLpHdLjXTlmusYc5xqte2IjMSZSXtEuVRI8PZOa85pAaxRAMzqelI4PsZTWyDNhK0OTfKYskP23dcEG%2FNIhQkmcJnlvvjqdZI%2Fn7JWPQJ70fVULoXzVLGimU3YiduIhY9E%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAXX4LHRIU7ZDGVTZF%2F20240629%2Fap-northeast-1%2Fs3%2Faws4_request&X-Amz-Date=20240629T152317Z&X-Amz-SignedHeaders=host&X-Amz-Expires=1800&X-Amz-Signature=f8d44150ee0fa09082a2b4b13d545eec010dd42afd7205ee68c52c23f0d0de17) |
図表5 |
![222397-5.jpg](https://s3-agre-content.s3.ap-northeast-1.amazonaws.com/assets/images/seika_chart/222397-5.jpg?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEHcaDmFwLW5vcnRoZWFzdC0xIkcwRQIhAJqN3H%2FfNnu6SzksAn4Xixb7%2Bq9JXkgVRTbO%2BQpwPiuzAiAqgbuedBeZ94cgn8AeCda0ml7m93xOa92Vh%2FV%2F052OSSqQBAgwEAIaDDUzMjMzMTA3MjA0MSIMAXFQK8WZklemKd0pKu0DaOlHzPjMw7EFxzx8MI3fsMluzt1kKx%2BZ5vlZ%2FEbSLNFlQBrRq88eRY%2B69YYZA%2B7IGEVnwYeAzPCBK8ty8xGJZOkTAWKltwyVNoY1Zg8YsXnQYvHFai6JPeq%2BInJNRJ9yx3rQqeV1%2FQ5KNZhid%2BD2AEPW0GwJ0FHD6e1jb1ptGHILlcifJxwFOlPdDA%2Fdm8oJAQzZ0Sjuz0E0n%2F4Y72DjV8zalEdKB0%2BqQSFaAxdo%2BX3lqordi3P5ankAb6AUo9IZW8BXij1zjhVFTzGi7XqLFv6Bkqwp3oQJBOUW279O5huF9VtSVgrXuCFc%2BgwCIZ%2FVN3KtW86JZQCgEFA%2BdlbGllo3By23dEhHOUsn2AqQ7yRxqe3hntUDhvJJSamc0jRKLPhSNfhJ6C6bLDFhGevi5eFGJ3jISVyuKWDKboI2nfosMV8PBzqGdNnTfRhZUCfMAancSrgUhR6nlJdBM0PgdNo2tdTFEVlXH69rCBVXIEZbtWlYln6iL44qzpO1IFfKCUvgJHsvUCFyO%2FpOLN1QSCoFrOduxWKAPnrS6oFIEy5eZ90xi2K5xMs80NyKQn9nMo2Al9Ks0KLWTRoLLMluCnJok24TifG5gV0aNmRblPfAQeiXQaJ7k9n%2F4IAfBiiajLb2SjEpgm1V2oS7JjD2yYC0BjqmAZcm0%2F%2Fdquuwi7Lla1xuFrQ2fGoJBDjK6CsZq%2FKvVy3pEVRWJd7Hbp68xLgBXFagiDOq72Nwi00BVJLyGn5%2BUJc6tGINivLpHdLjXTlmusYc5xqte2IjMSZSXtEuVRI8PZOa85pAaxRAMzqelI4PsZTWyDNhK0OTfKYskP23dcEG%2FNIhQkmcJnlvvjqdZI%2Fn7JWPQJ70fVULoXzVLGimU3YiduIhY9E%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAXX4LHRIU7ZDGVTZF%2F20240629%2Fap-northeast-1%2Fs3%2Faws4_request&X-Amz-Date=20240629T152317Z&X-Amz-SignedHeaders=host&X-Amz-Expires=1800&X-Amz-Signature=4c773aef14920fbd5411903774f15976330494b15b3e49f87dad67de1ae3654d) |
カテゴリ |
飼育技術
乳牛
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