We conducted a questionnaire investigation among breeding farmers to clarify the actual conditions of maternal rejection in Japanese Black cattle. We asked keeping experience of maternal rejective cows and compared occurrence patterns, rejective behavior manners, birth assistance methods, colostrum feeding method for calves, parity and rearing conditions of the cows. We found that 24% of the farms had kept rejective cows and 6% of the cows in these farms indicated maternal rejections. The most common occurrence pattern was 'Occurred from the first birth (65.6%)' and behavior manner was performing no maternal grooming with aggressive behavior (75%). Almost all the farmers assisted in each parturition (P < 0.05). There was not a significant difference among the colostrum feeding methods, but a significant difference in the rearing conditions of the cows, except for the cows with no data (P < 0.005). The parity of the rejective cows did not significantly differ in association with rejective behavior manners, birth assistance methods, colostrum feeding methods or rearing conditions. These results suggest that the occurrence rate of maternal rejection in Japanese Black cattle was approximately 6% and many of the rejective cows continuously performed no maternal grooming with aggressive behavior.

中文翻译：

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进行问卷调查以明确日本黑牛（Bos taurus）母体排斥行为的发生率和特征。

我们对育种农民进行了问卷调查，以弄清日本黑牛产妇排斥的实际情况。我们要求保持母体拒绝母牛的经验，并比较母牛的发生方式，拒绝行为方式，助产方法，初乳喂养犊牛的方法，胎次和饲养条件。我们发现，有24％的农场饲养了拒绝的奶牛，而这些农场中有6％的母牛表示拒绝了母乳。最常见的发生方式是“第一次生育发生（65.6％）”，并且行为方式是未进行具有积极行为的孕产妇修饰（75％）。几乎所有农民都在每次分娩时提供帮助（P <0.05）。初乳喂养方法之间没有显着差异，但是除了没有数据的奶牛外，其他奶牛的饲养条件有显着差异（P <0.005）。拒绝奶牛的胎次与拒绝行为方式，助产方法，初乳喂养方法或饲养条件没有显着差异。这些结果表明，日本黑牛的母体排斥发生率约为6％，并且许多被排斥的母牛连续不进行具有侵略行为的母体修饰。