Mohamadnia Ahmadreza, Khaghani Amin
Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran;
Behboud Dam Sepahan Co., Esfahan, Iran.
Vet Res Forum. 2013 Fall;4(4):245-9.
Wide variety of timings and techniques has been used based on the housing, production, availability of requirements etc. This current study was done for a morphologic evaluation of the cow's digit in different trimming times. A dairy herd with 2200 milking cow, free stalls barns, average daily production of 36 liters per cow was selected. Forty cows were assigned to four groups based on hoof trimming times as, 100-120 days in milk (Group I), cows before drying (Group II), visual long toed cows (Group III) and delayed pregnant cows (Group IV). Toe length from coronary band to the toe tip (A), dorsal hoof angle (D), toe height from coronary band in toe region to the ground level (B), heel height from coronary band in heel region to the ground level (C) and heel height to toe length proportion was measured. The highest toe length was recorded in medial digit of group IV (9.19 ± 0.68 cm) and the lowest one recorded in lateral digit of group I (8.28 ± 0.62 cm). Distribution of the cows in different groups under study was based on their toe length, as the highest and lowest distribution were recorded in groups III and I, respectively. The highest measurements in all indices were recorded in group IV that followed by group III except for toe height that was higher in group II following group IV. The lowest toe length was recorded in group I that needs more attention due to the risk of over trimming and its supposed complications in this group.
根据牛舍、生产情况、需求可用性等因素，人们采用了各种各样的时间安排和技术。本研究旨在对不同修剪时间的奶牛蹄趾进行形态学评估。选取了一个拥有2200头泌乳奶牛、采用自由栏舍、每头奶牛平均日产奶量为36升的奶牛群。根据蹄部修剪时间，将40头奶牛分为四组，分别为：产奶100 - 120天的奶牛（第一组）、干奶前的奶牛（第二组）、视觉上趾长的奶牛（第三组）和怀孕后期的奶牛（第四组）。测量了从冠状带至蹄尖的趾长（A）、蹄背角度（D）、趾部冠状带至地面的趾高（B）、跟部冠状带至地面的跟高（C）以及跟高与趾长的比例。第四组内侧趾的趾长最高（9.19 ± 0.68厘米），第一组外侧趾的趾长最低（8.28 ± 0.62厘米）。研究中不同组奶牛的分布基于它们的趾长，其中第三组和第一组的分布分别为最高和最低。除了趾高在第四组之后第二组较高外，所有指标的最高测量值均出现在第四组，其次是第三组。第一组的趾长最低，由于该组存在过度修剪的风险及其可能引发的并发症，因此需要更多关注。
