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Relationships among Behavior, Physiological States and Body Weight Gain in Grazing Holstein Heifers
http://hdl.handle.net/10458/4927
http://hdl.handle.net/10458/492754285354-b82d-4a7c-8ca0-5525e457c946
| 名前 / ファイル | ライセンス | アクション |
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handle4927.pdf (133.1 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2014-08-01 | |||||
| タイトル | ||||||
| タイトル | Relationships among Behavior, Physiological States and Body Weight Gain in Grazing Holstein Heifers | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| キーワード | Behavior, Heifer, Body Weight Gain, Physiological States, Pasture, Grazing | |||||
| 資源タイプ | ||||||
| 資源タイプ | journal article | |||||
| 著者 |
長谷川, 信美
× 長谷川, 信美× 左, 久× Hidari, Hisashi |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | This study examined the behavior of dairy heifers and the factors affecting the performance of them on pasture. Behavior of 10 Holstein heifers in a herd of 25 animals that rotationally grazed five 8-ha pastures was observed and recorded every 5 minutes during 24 hours; body weights were measured once a month from June to October. Blood and rumen fluid samples were collected from 5 of them bimonthly. Chemical composition was analyzed for the forage samples collected each month. CP content （DM basis） of herbage ranged from 12.2 （June） to 17.2% （October） and ADF from 31.1 （October） to 39.1% （July）. Standing （posture） time was different significantly among months （p<0.001） ranging from 48.3 to 61.3% of 24 hours and was longer in July and August （61.3% and 58.3%, respectively） when ADF content of herbage was higher than in the other months. Grazing time which significantly differed among months （p<0.001） ranged from 29.1 to 41.6% of 24 hours and was shorter in June and September （29.1% and 33.0%, respectively） when ADF content was lower than in the other months. Average DG through the experiment period was 0.74 kg/day. August was the lowest in DG （0.41 kg/day） and the longest in rumination time and standing-rumination time among months. Animals of higher DG had a shorter standing time （r=-0.36, p<0.01） and a longer lying-rumination time （r=0.55, p<0.001） throughout the experiment. Total protein concentration in blood ranged from 9.04 to 9.64 g/dl and was negatively correlated with DG （r=-0.65, p<0.05）. Phospholipid concentration of blood ranged from 119.66 to 156.40 mg/dl and was negatively correlated with DG （r=-0.57, p<0.05）. VFA in rumen fluid, acetic acid proportion （ranging from 69.35 to 74.76%） and butyric acid proportion （ranging from 7.18 to 12.05%） showed significant differences among months （p<0.05, p<0.001, respectively）. Butyric acid proportion was significantly related with DG （r=0.60, p<0.05）. | |||||
| 言語 | en | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. | |||||
| 言語 | en | |||||
| 書誌情報 |
en : Asian-Australasian Journal of Animal Sciences 巻 14, 号 6, p. 803-810, 発行日 2001-06 |
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| 出版者 | ||||||
| 出版者 | Asian-Australasian Association of Animal Production Societies (AAAP) | |||||
| 言語 | en | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 10112367 | |||||
| 権利 | ||||||
| 言語 | en | |||||
| 権利情報 | © 2014 by Asian-Australasian Journal of Animal Sciences | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://creativecommons.org/licenses/by-nc/3.0/ | |||||
| 関連名称 | http://creativecommons.org/licenses/by-nc/3.0/ | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://www.ajas.info/upload/pdf/14-115.pdf | |||||
| 関連名称 | http://www.ajas.info/upload/pdf/14-115.pdf | |||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
